50278 + Interview Questions in Physics Page 105 InterviewSolution

5201.	Two charges each of 1 colulomb are at a distance 1 km apart, the force between them is
Answer» Two charges each of 1 colulomb are at a distance 1 km apart, the force between them is

Discussion

5202.	In a medium the force of attraction between two point electric charges, distance r apart, is F. What distance apart should these be kept in the same medium so that the force between them becomes 3F?
Answer» In a medium the force of attraction between two point electric charges, distance r apart, is F. What distance apart should these be kept in the same medium so that the force between them becomes 3F?

Discussion

5203.	A wheel having moment of inertia 2 kgm2 about its axis, rotates at 50 rpm about this axis. Find the torque(Nm) that can stop the wheel in one minute.
Answer» A wheel having moment of inertia $2 {kgm}^{2}$ about its axis, rotates at $50 rpm$ about this axis. Find the torque $(Nm)$ that can stop the wheel in one minute.

Discussion

5204.	Given \|→A+→B\|=\|→A−→B\| Find the angle between →A and →B
Answer» Given $\| \to A + \to B \| = \| \to A - \to B \|$ Find the angle between $\to A$ and $\to B$

Discussion

5205.	Q. If acceleration a=3x(sq.), where x is position then velocity is proportional to1. sq. route of x2. x(sq.)3. cube of x4. sq. route of x cube
Answer» Q. If acceleration a=3x(sq.), where x is position then velocity is proportional to 1. sq. route of x 2. x(sq.) 3. cube of x 4. sq. route of x cube

Discussion

5206.	At t=0 , switch S1 is closed and remains closed for a long time and S2 remains open. Now S1 is opened and S2 is closed. Find out the charge on the capacitor long after that moment.
Answer» At $t = 0$ , switch $S_{1}$ is closed and remains closed for a long time and $S_{2}$ remains open. Now $S_{1}$ is opened and $S_{2}$ is closed. Find out the charge on the capacitor long after that moment.

Discussion

5207.	The binding energies of nuclei X and Y are E1 and E2 respectively. Two atoms of X fuse together to give one atom of Y and some amount of energy,Q is released. Then
Answer» The binding energies of nuclei X and Y are E₁ and E₂ respectively. Two atoms of X fuse together to give one atom of Y and some amount of energy,Q is released. Then

Discussion

5208.	Keeping banking angle same to increase maximum speed with which a vehicle can travel on curved road by10%radius of curvature of road has to be changed from 20 m to
Answer» Keeping banking angle same to increase maximum speed with which a vehicle can travel on curved road by10%radius of curvature of road has to be changed from 20 m to

Discussion

5209.	A vessel of depth 2h is half filled with a liquid of refractive index 2√2 and the upper half with another liquid of refractive index 2. The liquids are immiscible. The apparent depth of an object which has a height h2 from the bottom of the vessel inside the liquid as seen from the top of the vessel is (Take h=√2 m)
Answer» A vessel of depth $2 h$ is half filled with a liquid of refractive index $2 \sqrt{2}$ and the upper half with another liquid of refractive index $2$ . The liquids are immiscible. The apparent depth of an object which has a height $\frac{h}{2}$ from the bottom of the vessel inside the liquid as seen from the top of the vessel is (Take $h = \sqrt{2} m)$

Discussion

5210.	A charge Q is spread uniformly over an insulated ring of radius ‘R’. If the ring is rotated with angular velocity ‘ω′ with respect to the normal axis, the magnetic moment of the ring is
Answer» A charge Q is spread uniformly over an insulated ring of radius ‘R’. If the ring is rotated with angular velocity $‘ ω^{'}$ with respect to the normal axis, the magnetic moment of the ring is

Discussion

5211.	Two travelling waves y1=A sin [k(x - ct)] and y2=A sin [k(x+ct)] are superimposed on string. The distance between adjacent nodes is
Answer» Two travelling waves $y_{1} = A sin [k(x - ct)]$ and $y_{2} = A sin [k (x + c t)]$ are superimposed on string. The distance between adjacent nodes is

Discussion

5212.	A wave is travelling along positive x− direction with speed 4 m/s. Further, equation of the wave pulse at t=0 is y(x,0)=54+(3x+6)2. The equation of the same pulse after t s will be
Answer» A wave is travelling along positive $x -$ direction with speed $4 m/s$ . Further, equation of the wave pulse at $t = 0$ is $y (x, 0) = \frac{5}{4 + (3 x + 6)^{2}}$ . The equation of the same pulse after $t s$ will be

Discussion

5213.	no. of electrons constituting 10C of charge
Answer» no. of electrons constituting 10C of charge

Discussion

5214.	A boy is pushing a ring of mass 2 kg and radius 0.5 m with a stick as shown in the figure. The stick applies a normal force of 2 N on the ring and rolls it without slipping with an acceleration of 0.3 ms−2. The coefficient of friction between the ground and the ring is large enough that rolling always occurs, and the coefficient of friction between the stick and the ring is (P/10) . The value of P is
Answer» A boy is pushing a ring of mass $2 k g$ and radius $0.5 m$ with a stick as shown in the figure. The stick applies a normal force of $2 N$ on the ring and rolls it without slipping with an acceleration of $0.3 m s^{- 2}$ . The coefficient of friction between the ground and the ring is large enough that rolling always occurs, and the coefficient of friction between the stick and the ring is $(P / 10)$ . The value of $P$ is

Discussion

5215.	A plane loop is shaped in the form as shown in figure with radii a=20 cm and b=10 cm and is placed in a uniform time varying magnetic field B=B0sin(ωt) where B0=10 m T and ω=100 rad s−1. The amplitude of the induced current in the loop is n A. The value of n is (integer only) [Resistance per unit length λ=50×10−3Ωm−1 and inductance of the loop is negligible.]
Answer» A plane loop is shaped in the form as shown in figure with radii $a = 20 cm$ and $b = 10 cm$ and is placed in a uniform time varying magnetic field $B = B_{0} sin (ω t)$ where $B_{0} = 10 m T$ and $ω = 100 {rad s}^{- 1}$ . The amplitude of the induced current in the loop is $n A .$ The value of $n$ is (integer only) [Resistance per unit length $λ = 50 \times 10^{- 3} Ω m^{- 1}$ and inductance of the loop is negligible.]

Discussion

5216.	In the figure, the block of mass m, attached to the spring of stiffness k is in contact with the completely elastic wall, and the compression in the spring is ‘e’. The spring is compressed further by ‘e’ by displacing the block towards left and is then released. If the collision between the block and the wall is completely elastic then the time period of oscillations of the block will be :
Answer» In the figure, the block of mass m, attached to the spring of stiffness $k$ is in contact with the completely elastic wall, and the compression in the spring is ‘ $e$ ’. The spring is compressed further by ‘ $e$ ’ by displacing the block towards left and is then released. If the collision between the block and the wall is completely elastic then the time period of oscillations of the block will be :

Discussion

5217.	A projectile is given an initial velocity of (2^i+4^j) m/s, where ^i is along the ground and ^j is along the vertical. If g=10 m/s2, then the equation of its trajectory is
Answer» A projectile is given an initial velocity of $(2^i + 4^j)$ $m / s$ , where $^i$ is along the ground and $^j$ is along the vertical. If $g = 10 m / s^{2}$ , then the equation of its trajectory is

Discussion

5218.	Two particles of masses 4 kg & 2 kg are located as shown in the figure. The position of the centre of mass of the given system is (cos37∘=45 )
Answer» Two particles of masses $4 kg$ & $2 kg$ are located as shown in the figure. The position of the centre of mass of the given system is $(cos 37^{\circ} = \frac{4}{5})$

Discussion

5219.	For the given uniformly charged quarter ring, the electric field along x− axis is
Answer» For the given uniformly charged quarter ring, the electric field along $x -$ axis is

Discussion

5220.	54.A galvanometer coil has resistance 90 ohm and full scale deflection current 10 mA .A 910 ohm resistance is coonected in series with galvanometer to make it voltmeter.If the least count of voltmeter is 0.1 V then number of divisions on its scale is??
Answer» 54.A galvanometer coil has resistance 90 ohm and full scale deflection current 10 mA .A 910 ohm resistance is coonected in series with galvanometer to make it voltmeter.If the least count of voltmeter is 0.1 V then number of divisions on its scale is??

Discussion

5221.	The work done in slowly moving an electron of charge e and mass m from A to B along a semicircular pat in vertical plane in the field of charge Q is
Answer» The work done in slowly moving an electron of charge e and mass m from A to B along a semicircular pat in vertical plane in the field of charge Q is

Discussion

5222.	Define wavelength of a sound wave. How is it related to frequency and wave speed?
Answer» Define wavelength of a sound wave. How is it related to frequency and wave speed?

Discussion

5223.	For a concave lens of focal length f, the relation between object and image distances u and y, respectively, from its pole can best be represented by(u=v is the reference line):
Answer» For a concave lens of focal length $f$ , the relation between object and image distances $u$ and $y$ , respectively, from its pole can best be represented by( $u = v$ is the reference line):

Discussion

5224.	A particle of mass 1 kg is projected from the ground with an initial speed u at an angle 60∘ with the horizontal. At the highest point of its trajectory, it makes a complete inelastic collision with another identical particle, which was thrown vertically upwards from the ground with the same initial speed u. The angle that the composite system makes with the horizontal just after collision in degrees is .
Answer» A particle of mass $1 kg$ is projected from the ground with an initial speed $u$ at an angle $60^{\circ}$ with the horizontal. At the highest point of its trajectory, it makes a complete inelastic collision with another identical particle, which was thrown vertically upwards from the ground with the same initial speed $u$ . The angle that the composite system makes with the horizontal just after collision in degrees is .

Discussion

5225.	∫(2x+3)√2−3x dx is equal to
Answer» $\int (2 x + 3) \sqrt{2 - 3 x} d x$ is equal to

Discussion

5226.	Find Ceff
Answer» Find $C_{e f f}$

Discussion

5227.	34.A bar of iron is 10 cmat 20'C.At 19'C it will be (alpha Fe=11×10-6/^° C) 1) 11×10-6 cm longer 2)11×10-6 cm shorter 3)11×10-5 cm shorter 4)11×10-5 cm longer
Answer» 34.A bar of iron is 10 cmat 20'C.At 19'C it will be (alpha Fe=11×10-6/^° C) 1) 11×10-6 cm longer 2)11×10-6 cm shorter 3)11×10-5 cm shorter 4)11×10-5 cm longer

Discussion

5228.	Let us list some of the factors, which could possibly influence thespeed of wave propagation: (i) nature of the source. (ii) direction of propagation. (iii) motion of the source and/or observer. (iv) wavelength (v) intensity of the wave.On which of these factors, if any, does(a) the speed of light in vacuum,(b) the speed of light in a medium (say, glass or water),depend?
Answer» Let us list some of the factors, which could possibly influence thespeed of wave propagation: (i) nature of the source. (ii) direction of propagation. (iii) motion of the source and/or observer. (iv) wavelength (v) intensity of the wave.On which of these factors, if any, does(a) the speed of light in vacuum,(b) the speed of light in a medium (say, glass or water),depend?

Discussion

5229.	Two blocks are connected by a string, as shown in the figure. They are released from rest. Find the speed after they have moved a distance x. μ is the coefficient of kinetic friction between the upper block and the surface. Assume that the pulley is massless and frictionless.
Answer» Two blocks are connected by a string, as shown in the figure. They are released from rest. Find the speed after they have moved a distance x. $μ$ is the coefficient of kinetic friction between the upper block and the surface. Assume that the pulley is massless and frictionless.

Discussion

5230.	You are riding in an automobile of mass 3000 kg. Assuming that you are examining the oscillation characteristics of its suspension system, the suspension hangs 15 cm when the entire automobile is placed on it. Also, the amplitude of oscillation decreases by 50% during one complete oscillation. The values of the spring constant k and the damping constant b for the spring and shock absorber system of one wheel (assuming that each wheel supports 750 kg) are:
Answer» You are riding in an automobile of mass 3000 kg. Assuming that you are examining the oscillation characteristics of its suspension system, the suspension hangs 15 cm when the entire automobile is placed on it. Also, the amplitude of oscillation decreases by $50 %$ during one complete oscillation. The values of the spring constant k and the damping constant b for the spring and shock absorber system of one wheel (assuming that each wheel supports 750 kg) are:

Discussion

5231.	A projectile rises upto a maximum distance of R1−k2 where K is a constant and R is the radius of Earth. If the velocity of the projectile with which it should be fired upwards from the surface of Earth to reach this height is equal to the product of a coefficient and escape velocity, then this coefficient is equal to:
Answer» A projectile rises upto a maximum distance of $\frac{R}{1 - k^{2}}$ where K is a constant and R is the radius of Earth. If the velocity of the projectile with which it should be fired upwards from the surface of Earth to reach this height is equal to the product of a coefficient and escape velocity, then this coefficient is equal to:

Discussion

5232.	Two bodies A and B of masses 5 kg and 10 kg in contact with each other rest on a table against a rigid wall (Fig. 5.21). The coefficient of friction between the bodies and the table is 0.15. A force of 200 N is applied horizontally to A. What are (a) the reaction of the partition (b) the action-reaction forces between A and B? What happens when the wall is removed? Does the answer to (b) change, when the bodies are in motion? Ignore the difference between μs and μk.
Answer» Two bodies A and B of masses 5 kg and 10 kg in contact with each other rest on a table against a rigid wall (Fig. 5.21). The coefficient of friction between the bodies and the table is 0.15. A force of 200 N is applied horizontally to A. What are (a) the reaction of the partition (b) the action-reaction forces between A and B? What happens when the wall is removed? Does the answer to (b) change, when the bodies are in motion? Ignore the difference between $μ_{s}$ and $μ_{k}$ .

Discussion

5233.	A bob of a simple pendulum, which is initially at rest at its mean position, is now raised to a vertical height of 1.8 cm and released from rest. The velocity of the bob at the mean position is
Answer» A bob of a simple pendulum, which is initially at rest at its mean position, is now raised to a vertical height of $1.8 cm$ and released from rest. The velocity of the bob at the mean position is

Discussion

5234.	A battery of 10 V is connected in series with resistors of 3 Ω,5 Ω,4 Ω,5 Ω and 13 Ω. How much current would flow through the 3 Ω resistor?
Answer» A battery of 10 V is connected in series with resistors of $3 Ω, 5 Ω, 4 Ω, 5 Ω a n d 13 Ω .$ How much current would flow through the $3 Ω$ resistor?

Discussion

5235.	5-(3aa-2a)(6-3aa+2a)
Answer» 5-(3aa-2a)(6-3aa+2a)

Discussion

5236.	For the given system, it is desired that the system be stable. The minimum value of α for this condition is 0.618
Answer» For the given system, it is desired that the system be stable. The minimum value of $α$ for this condition is 0.618

Discussion

5237.	Two metallic spheres S1 and S2 are made of the same material and have identical surface finish. The mass of S1 is three times that of S2. Both the spheres are heated to the same high temperature and placed in the same room having lower temperature, but are thermally insulated from each other. This ratio of the initial rate of cooling of S1 to that of S2 is
Answer» Two metallic spheres $S_{1}$ and $S_{2}$ are made of the same material and have identical surface finish. The mass of $S_{1}$ is three times that of $S_{2}$ . Both the spheres are heated to the same high temperature and placed in the same room having lower temperature, but are thermally insulated from each other. This ratio of the initial rate of cooling of $S_{1}$ to that of $S_{2}$ is

Discussion

5238.	Two particles A and B start moving with velocities 20m/s and 30√2m/s along x-axis and at an angle of 45 degree with x-axis respectively in xy - plane from origin. what is the relative velocity of B w.r.t A ?
Answer» Two particles A and B start moving with velocities 20m/s and 30√2m/s along x-axis and at an angle of 45 degree with x-axis respectively in xy - plane from origin. what is the relative velocity of B w.r.t A ?

Discussion

5239.	Two cars moving in opposite directions approach each other with speeds of 40 ms−1 and 50 ms−1 respectively. The driver of the first car blows a horn of frequency 400 Hz. The frequency heard by the driver of the second car is [speed of sound =340 ms−1]
Answer» Two cars moving in opposite directions approach each other with speeds of $40 {ms}^{- 1}$ and $50 {ms}^{- 1}$ respectively. The driver of the first car blows a horn of frequency $400 Hz$ . The frequency heard by the driver of the second car is [speed of sound $= 340 {ms}^{- 1}$ ]

Discussion

5240.	For the given whole numbers, choose the correct option such that the resultant is NOT closed.3 ________ 5
Answer» For the given whole numbers, choose the correct option such that the resultant is NOT closed. 3 ________ 5

5240.

For the given whole numbers, choose the correct option such that the resultant is NOT closed.3 ________ 5

Answer»

For the given whole numbers, choose the correct option such that the resultant is NOT closed.

3 ________ 5

Discussion

5241.	The specific heat capacities of hydrogen at constant volume and at constant pressure 2.4 cal g−1 0C−1 and 3.4calg−1 0C−1 respectively. The molecular weight of hydrogen is 2 g mol−1 and the gas constant R=8.3×10γ ~erg0C−1mol−1. Calculate the valuve of J
Answer» The specific heat capacities of hydrogen at constant volume and at constant pressure 2.4 cal $g^{- 1}^{0} C^{- 1}$ and $3.4 c a l g^{- 1}^{0} C^{- 1}$ respectively. The molecular weight of hydrogen is 2 g $m o l^{- 1}$ and the gas constant $R = 8.3 \times 10^{γ}$ ~ $e r g^{0} C^{- 1} m o l^{- 1} .$ Calculate the valuve of J

Discussion

5242.	In hydrogen spectrum, the ratio of the longest wavelength in the Lyman series to the longest wavelength in the Balmer series is -
Answer» In hydrogen spectrum, the ratio of the longest wavelength in the Lyman series to the longest wavelength in the Balmer series is -

Discussion

5243.	Two magnets of equal mass are joined at right angles to each other, as shown in the figure. The magnet 1 has a magnetic moment four times that of magnet 2. This arrangement is pivoted so that it is free to rotate in the horizontal plane. In equilibrium, what will be the angle (θ) subtended by the magnet 1 with the magnetic meridian.
Answer» Two magnets of equal mass are joined at right angles to each other, as shown in the figure. The magnet $1$ has a magnetic moment four times that of magnet $2$ . This arrangement is pivoted so that it is free to rotate in the horizontal plane. In equilibrium, what will be the angle $(θ)$ subtended by the magnet $1$ with the magnetic meridian.

Discussion

5244.	What is the gain of the transfer function G(s)=5(s+1)(s+3)2?
Answer» What is the gain of the transfer function $G (s) = \frac{5 (s + 1)}{(s + 3)^{2}} ?$

Discussion

5245.	Find the natural frequency of oscillation of spring block system shown.
Answer» Find the natural frequency of oscillation of spring block system shown.

Discussion

5246.	A hydraulic automobile lift is designed to lift cars with a maximum mass of 3000 kg. The area of cross-section of the piston carrying the load is 425 cm². What maximum pressure would the smaller piston have to bear ?
Answer» A hydraulic automobile lift is designed to lift cars with a maximum mass of 3000 kg. The area of cross-section of the piston carrying the load is 425 cm². What maximum pressure would the smaller piston have to bear ?

Discussion

5247.	is phase difference in travelling wave =kx?
Answer» is phase difference in travelling wave =kx?

Discussion

5248.	Some equipotential surfaces are shown in figure given below. The magnitude of electric field will be
Answer» Some equipotential surfaces are shown in figure given below. The magnitude of electric field will be

Discussion

5249.	In the given circuit diagram, when the current reaches steady state in the circuit, the charge on the capacitor of capacitance C will be
Answer» In the given circuit diagram, when the current reaches steady state in the circuit, the charge on the capacitor of capacitance $C$ will be

Discussion

5250.	8.A coil fo inductance 0.50 H and resistance of 100 ohms is connected to a 240V 50 Hz a) what is the maximum current in the coil ? b) what is the time lag between voltage maximum and current maximum?
Answer» 8.A coil fo inductance 0.50 H and resistance of 100 ohms is connected to a 240V 50 Hz a) what is the maximum current in the coil ? b) what is the time lag between voltage maximum and current maximum?

Discussion

Explore topic-wise InterviewSolutions in .

Two charges each of 1 colulomb are at a distance 1 km apart, the force between them is

In a medium the force of attraction between two point electric charges, distance r apart, is F. What distance apart should these be kept in the same medium so that the force between them becomes 3F?

A wheel having moment of inertia 2 kgm2 about its axis, rotates at 50 rpm about this axis. Find the torque(Nm) that can stop the wheel in one minute.

Given |→A+→B|=|→A−→B| Find the angle between →A and →B

Q. If acceleration a=3x(sq.), where x is position then velocity is proportional to1. sq. route of x2. x(sq.)3. cube of x4. sq. route of x cube

At t=0 , switch S1 is closed and remains closed for a long time and S2 remains open. Now S1 is opened and S2 is closed. Find out the charge on the capacitor long after that moment.

The binding energies of nuclei X and Y are E1 and E2 respectively. Two atoms of X fuse together to give one atom of Y and some amount of energy,Q is released. Then

Keeping banking angle same to increase maximum speed with which a vehicle can travel on curved road by10%radius of curvature of road has to be changed from 20 m to

A charge Q is spread uniformly over an insulated ring of radius ‘R’. If the ring is rotated with angular velocity ‘ω′ with respect to the normal axis, the magnetic moment of the ring is

Two travelling waves y1=A sin [k(x - ct)] and y2=A sin [k(x+ct)] are superimposed on string. The distance between adjacent nodes is

A wave is travelling along positive x− direction with speed 4 m/s. Further, equation of the wave pulse at t=0 is y(x,0)=54+(3x+6)2. The equation of the same pulse after t s will be

no. of electrons constituting 10C of charge

A projectile is given an initial velocity of (2^i+4^j) m/s, where ^i is along the ground and ^j is along the vertical. If g=10 m/s2, then the equation of its trajectory is

Two particles of masses 4 kg & 2 kg are located as shown in the figure. The position of the centre of mass of the given system is (cos37∘=45 )

For the given uniformly charged quarter ring, the electric field along x− axis is

54.A galvanometer coil has resistance 90 ohm and full scale deflection current 10 mA .A 910 ohm resistance is coonected in series with galvanometer to make it voltmeter.If the least count of voltmeter is 0.1 V then number of divisions on its scale is??

The work done in slowly moving an electron of charge e and mass m from A to B along a semicircular pat in vertical plane in the field of charge Q is

Define wavelength of a sound wave. How is it related to frequency and wave speed?

For a concave lens of focal length f, the relation between object and image distances u and y, respectively, from its pole can best be represented by(u=v is the reference line):

∫(2x+3)√2−3x dx is equal to

Find Ceff

34.A bar of iron is 10 cmat 20'C.At 19'C it will be (alpha Fe=11×10-6/^° C) 1) 11×10-6 cm longer 2)11×10-6 cm shorter 3)11×10-5 cm shorter 4)11×10-5 cm longer

Two blocks are connected by a string, as shown in the figure. They are released from rest. Find the speed after they have moved a distance x. μ is the coefficient of kinetic friction between the upper block and the surface. Assume that the pulley is massless and frictionless.

A bob of a simple pendulum, which is initially at rest at its mean position, is now raised to a vertical height of 1.8 cm and released from rest. The velocity of the bob at the mean position is

A battery of 10 V is connected in series with resistors of 3 Ω,5 Ω,4 Ω,5 Ω and 13 Ω. How much current would flow through the 3 Ω resistor?

5-(3aa-2a)(6-3aa+2a)

For the given system, it is desired that the system be stable. The minimum value of α for this condition is 0.618

Two particles A and B start moving with velocities 20m/s and 30√2m/s along x-axis and at an angle of 45 degree with x-axis respectively in xy - plane from origin. what is the relative velocity of B w.r.t A ?

Two cars moving in opposite directions approach each other with speeds of 40 ms−1 and 50 ms−1 respectively. The driver of the first car blows a horn of frequency 400 Hz. The frequency heard by the driver of the second car is [speed of sound =340 ms−1]

For the given whole numbers, choose the correct option such that the resultant is NOT closed.3 ________ 5

The specific heat capacities of hydrogen at constant volume and at constant pressure 2.4 cal g−1 0C−1 and 3.4calg−1 0C−1 respectively. The molecular weight of hydrogen is 2 g mol−1 and the gas constant R=8.3×10γ ~erg0C−1mol−1. Calculate the valuve of J

In hydrogen spectrum, the ratio of the longest wavelength in the Lyman series to the longest wavelength in the Balmer series is -

What is the gain of the transfer function G(s)=5(s+1)(s+3)2?

Find the natural frequency of oscillation of spring block system shown.

A hydraulic automobile lift is designed to lift cars with a maximum mass of 3000 kg. The area of cross-section of the piston carrying the load is 425 cm². What maximum pressure would the smaller piston have to bear ?

is phase difference in travelling wave =kx?

Some equipotential surfaces are shown in figure given below. The magnitude of electric field will be

In the given circuit diagram, when the current reaches steady state in the circuit, the charge on the capacitor of capacitance C will be

8.A coil fo inductance 0.50 H and resistance of 100 ohms is connected to a 240V 50 Hz a) what is the maximum current in the coil ? b) what is the time lag between voltage maximum and current maximum?

Explore topic-wise InterviewSolutions in .

Two charges each of 1 colulomb are at a distance 1 km apart, the force between them is

In a medium the force of attraction between two point electric charges, distance r apart, is F. What distance apart should these be kept in the same medium so that the force between them becomes 3F?

A wheel having moment of inertia 2 kgm2 about its axis, rotates at 50 rpm about this axis. Find the torque(Nm) that can stop the wheel in one minute.

Given |→A+→B|=|→A−→B| Find the angle between →A and →B

Q. If acceleration a=3x(sq.), where x is position then velocity is proportional to1. sq. route of x2. x(sq.)3. cube of x4. sq. route of x cube

At t=0 , switch S1 is closed and remains closed for a long time and S2 remains open. Now S1 is opened and S2 is closed. Find out the charge on the capacitor long after that moment.

The binding energies of nuclei X and Y are E1 and E2 respectively. Two atoms of X fuse together to give one atom of Y and some amount of energy,Q is released. Then

Keeping banking angle same to increase maximum speed with which a vehicle can travel on curved road by10%radius of curvature of road has to be changed from 20 m to

A charge Q is spread uniformly over an insulated ring of radius ‘R’. If the ring is rotated with angular velocity ‘ω′ with respect to the normal axis, the magnetic moment of the ring is

Two travelling waves y1=A sin [k(x - ct)] and y2=A sin [k(x+ct)] are superimposed on string. The distance between adjacent nodes is

A wave is travelling along positive x− direction with speed 4 m/s. Further, equation of the wave pulse at t=0 is y(x,0)=54+(3x+6)2. The equation of the same pulse after t s will be

no. of electrons constituting 10C of charge

A projectile is given an initial velocity of (2^i+4^j) m/s, where ^i is along the ground and ^j is along the vertical. If g=10 m/s2, then the equation of its trajectory is

Two particles of masses 4 kg &amp; 2 kg are located as shown in the figure. The position of the centre of mass of the given system is (cos37∘=45 )

For the given uniformly charged quarter ring, the electric field along x− axis is

54.A galvanometer coil has resistance 90 ohm and full scale deflection current 10 mA .A 910 ohm resistance is coonected in series with galvanometer to make it voltmeter.If the least count of voltmeter is 0.1 V then number of divisions on its scale is??

The work done in slowly moving an electron of charge e and mass m from A to B along a semicircular pat in vertical plane in the field of charge Q is

Define wavelength of a sound wave. How is it related to frequency and wave speed?

For a concave lens of focal length f, the relation between object and image distances u and y, respectively, from its pole can best be represented by(u=v is the reference line):

∫(2x+3)√2−3x dx is equal to

Find Ceff

34.A bar of iron is 10 cmat 20'C.At 19'C it will be (alpha Fe=11×10-6/^° C) 1) 11×10-6 cm longer 2)11×10-6 cm shorter 3)11×10-5 cm shorter 4)11×10-5 cm longer

Two blocks are connected by a string, as shown in the figure. They are released from rest. Find the speed after they have moved a distance x. μ is the coefficient of kinetic friction between the upper block and the surface. Assume that the pulley is massless and frictionless.

A bob of a simple pendulum, which is initially at rest at its mean position, is now raised to a vertical height of 1.8 cm and released from rest. The velocity of the bob at the mean position is

A battery of 10 V is connected in series with resistors of 3 Ω,5 Ω,4 Ω,5 Ω and 13 Ω. How much current would flow through the 3 Ω resistor?

5-(3a*a-2a)(6-3a*a+2a)

For the given system, it is desired that the system be stable. The minimum value of α for this condition is 0.618

Two particles A and B start moving with velocities 20m/s and 30√2m/s along x-axis and at an angle of 45 degree with x-axis respectively in xy - plane from origin. what is the relative velocity of B w.r.t A ?

Two cars moving in opposite directions approach each other with speeds of 40 ms−1 and 50 ms−1 respectively. The driver of the first car blows a horn of frequency 400 Hz. The frequency heard by the driver of the second car is [speed of sound =340 ms−1]

For the given whole numbers, choose the correct option such that the resultant is NOT closed.3 ________ 5

The specific heat capacities of hydrogen at constant volume and at constant pressure 2.4 cal g−1 0C−1 and 3.4calg−1 0C−1 respectively. The molecular weight of hydrogen is 2 g mol−1 and the gas constant R=8.3×10γ ~erg0C−1mol−1. Calculate the valuve of J

In hydrogen spectrum, the ratio of the longest wavelength in the Lyman series to the longest wavelength in the Balmer series is -

What is the gain of the transfer function G(s)=5(s+1)(s+3)2?

Find the natural frequency of oscillation of spring block system shown.

A hydraulic automobile lift is designed to lift cars with a maximum mass of 3000 kg. The area of cross-section of the piston carrying the load is 425 cm². What maximum pressure would the smaller piston have to bear ?

is phase difference in travelling wave =kx?

Some equipotential surfaces are shown in figure given below. The magnitude of electric field will be

In the given circuit diagram, when the current reaches steady state in the circuit, the charge on the capacitor of capacitance C will be

8.A coil fo inductance 0.50 H and resistance of 100 ohms is connected to a 240V 50 Hz a) what is the maximum current in the coil ? b) what is the time lag between voltage maximum and current maximum?

Two particles of masses 4 kg & 2 kg are located as shown in the figure. The position of the centre of mass of the given system is (cos37∘=45 )

5-(3aa-2a)(6-3aa+2a)