50278 + Interview Questions in Physics Page 276 InterviewSolution

13751.	A lossless transmission line having operating voltage VS=VR=400kV has surge impedance of 400 Ω. It is connected with a 25% of shunt capacitance compensation at the load end. If the generator is delivering a power of 200 MW through these lines, then the load angle δ of the generator in degree is
Answer» A lossless transmission line having operating voltage $V_{S} = V_{R} = 400 k V$ has surge impedance of 400 $Ω$ . It is connected with a 25% of shunt capacitance compensation at the load end. If the generator is delivering a power of 200 MW through these lines, then the load angle $δ$ of the generator in degree is

Discussion

13752.	A small block is connected to one end of two identical massless strings of length 503 cm each with their other ends fixed to a vertical rod. If the ratio of tensions be 4:1, then what will be the angular velocity ω of the block.
Answer» A small block is connected to one end of two identical massless strings of length $\frac{50}{3}$ cm each with their other ends fixed to a vertical rod. If the ratio of tensions be 4:1, then what will be the angular velocity $ω$ of the block.

13752.

A small block is connected to one end of two identical massless strings of length 503 cm each with their other ends fixed to a vertical rod. If the ratio of tensions be 4:1, then what will be the angular velocity ω of the block.

Answer»

A small block is connected to one end of two identical massless strings of length $\frac{50}{3}$ cm each with their other ends fixed to a vertical rod. If the ratio of tensions be 4:1, then what will be the angular velocity $ω$ of the block.

Discussion

13753.	Keeping the sourcefrequency equal to the resonating frequency of the series LCRcircuit, if the three elements, L, C and R arearranged in parallel, show that the total current in the parallel LCRcircuit is minimum at this frequency. Obtain the current rmsvalue in each branch of the circuit for the elements and sourcespecified in Exercise 7.11 for this frequency.
Answer» Keeping the source frequency equal to the resonating frequency of the series LCR circuit, if the three elements, L, C and R are arranged in parallel, show that the total current in the parallel LCR circuit is minimum at this frequency. Obtain the current rms value in each branch of the circuit for the elements and source specified in Exercise 7.11 for this frequency.

Discussion

13754.	In the given velocity-time graph, AB shows that the body has:
Answer» In the given velocity-time graph, $A B$ shows that the body has:

13754.

In the given velocity-time graph, AB shows that the body has:

Answer»

In the given velocity-time graph, $A B$ shows that the body has:

Discussion

13755.	A block of mass 2 kg is given a push for a moment horizontally and then the block starts sliding over a horizontal plane. The graph shows the velocity-time graph of the motion. The co-efficient of sliding friction between the plane and the block is μ, then the value of 10μ is (Answer upto two digit after decimal places)
Answer» A block of mass 2 kg is given a push for a moment horizontally and then the block starts sliding over a horizontal plane. The graph shows the velocity-time graph of the motion. The co-efficient of sliding friction between the plane and the block is $μ$ , then the value of $10 μ$ is (Answer upto two digit after decimal places)

Discussion

13756.	Two planets move around the sun. The periodic times and the mean radii of the orbits are T1,T2 and r1,r2 respectively. The ratio T1T2 is equal to.
Answer» Two planets move around the sun. The periodic times and the mean radii of the orbits are $T_{1}, T_{2} a n d r_{1,} r_{2}$ respectively. The ratio $\frac{T_{1}}{T_{2}}$ is equal to.

Discussion

13757.	If carnot engine works between 127 degree Celsius to 527 degree Celsius then it's efficiency isA) 25%B)37.5%C)50%D)75%
Answer» If carnot engine works between 127 degree Celsius to 527 degree Celsius then it's efficiency is A) 25% B)37.5% C)50% D)75%

Discussion

13758.	The diameter of the spherical bob is measured using a vernier callipers. 9 divisions of the main scale, in the vernier callipers, are equal to 10 divisions of the vernier scale. One main scale division is 1 mm. The main scale reading is 10 mm and 8th division of vernier scale was found to coincide exactly with one of the main scale division. If the given vernier callipers has positive zero error of 0.04 cm, then the radius of the bob is ____×10−2 cm.
Answer» The diameter of the spherical bob is measured using a vernier callipers. $9$ divisions of the main scale, in the vernier callipers, are equal to $10$ divisions of the vernier scale. One main scale division is $1 mm$ . The main scale reading is $10 mm$ and $8^{t h}$ division of vernier scale was found to coincide exactly with one of the main scale division. If the given vernier callipers has positive zero error of $0.04 cm$ , then the radius of the bob is ____ $\times 10^{- 2} cm$ .

Discussion

13759.	A charged particle (Q = 1 C) is projected with velocity 10 m/s from origin in xy plane inside a uniform magnetic field →B=2^iT as shown. Magnetic force on the charged particle just after projection will beएक आवेशित कण (Q = 1 C) को दर्शाए अनुसार x-y तल में मूलबिंदु से एकसमान चुम्बकीय क्षेत्र →B=2^iT के अन्दर 10 m/s के वेग से प्रक्षेपित किया जाता है। प्रक्षेपण के ठीक बाद आवेशित कण पर चुम्बकीय बल होगा
Answer» A charged particle (Q = 1 C) is projected with velocity 10 m/s from origin in xy plane inside a uniform magnetic field $\to B = 2^i T$ as shown. Magnetic force on the charged particle just after projection will be एक आवेशित कण (Q = 1 C) को दर्शाए अनुसार x-y तल में मूलबिंदु से एकसमान चुम्बकीय क्षेत्र $\to B = 2^i T$ के अन्दर 10 m/s के वेग से प्रक्षेपित किया जाता है। प्रक्षेपण के ठीक बाद आवेशित कण पर चुम्बकीय बल होगा

Discussion

13760.	Discuss resonance and formal charge in N_3^- and N_2O?
Answer» Discuss resonance and formal charge in N_3^- and N_2O?

Discussion

13761.	A block of mass m is suspended by a light thread from an elevator. The elevator is accelerating upward with a uniform acceleration a. The work done by tension on the block in t seconds is (u=0)
Answer» A block of mass $m$ is suspended by a light thread from an elevator. The elevator is accelerating upward with a uniform acceleration $a$ . The work done by tension on the block in $t$ seconds is $(u = 0)$

Discussion

13762.	Two successive resonance frequencies in an open organ pipe are 1944 Hz and 2592 Hz. Find the length of the tube. The speed of sound in air is 324 ms−1
Answer» Two successive resonance frequencies in an open organ pipe are 1944 Hz and 2592 Hz. Find the length of the tube. The speed of sound in air is $324 m s^{- 1}$

Discussion

13763.	A point source radiates energy at the rate of 10 Joules per second, or 10 Watts. As shown in the diagram, two spherical shells of radii r1 and r2 (r1 < r2) receive energies E1 and E2 per second, respectively. Which of the following option(s) is/are true?
Answer» A point source radiates energy at the rate of 10 Joules per second, or 10 Watts. As shown in the diagram, two spherical shells of radii $r_{1} a n d r_{2} (r_{1} < r_{2})$ receive energies $E_{1} a n d E_{2}$ per second, respectively. Which of the following option(s) is/are true?

13763.

A point source radiates energy at the rate of 10 Joules per second, or 10 Watts. As shown in the diagram, two spherical shells of radii r1 and r2 (r1 < r2) receive energies E1 and E2 per second, respectively. Which of the following option(s) is/are true?

Answer»

A point source radiates energy at the rate of 10 Joules per second, or 10 Watts. As shown in the diagram, two spherical shells of radii $r_{1} a n d r_{2} (r_{1} < r_{2})$ receive energies $E_{1} a n d E_{2}$ per second, respectively. Which of the following option(s) is/are true?

Discussion

13764.	If the screw on a screw-gauge is given six rotations, it moves by 3 mm on the main scale. If there are 50 divisions on the circular scale, the least count of the screw gauge is:
Answer» If the screw on a screw-gauge is given six rotations, it moves by $3 mm$ on the main scale. If there are $50$ divisions on the circular scale, the least count of the screw gauge is:

Discussion

13765.	A boy covers a distance AB of 2 km with speed of 2.5 km/hr, while going from A to B and comes back from B to A with speed 0.5 km/hr, his average speed will be
Answer» A boy covers a distance $A B$ of $2 km$ with speed of $2.5 km/hr$ , while going from $A$ to $B$ and comes back from $B$ to $A$ with speed $0.5 km/hr$ , his average speed will be

Discussion

13766.	40.The average value of sawtooth voltage V=V^°{2t/T-1} over 0 to T/2 is given by
Answer» 40.The average value of sawtooth voltage V=V^°{2t/T-1} over 0 to T/2 is given by

Discussion

13767.	Two particles A and B are thrown vertically upward with velocity, 5 m/s and 10 m/s respectively (g=10m/s2). Find separation between them after one second.
Answer» Two particles A and B are thrown vertically upward with velocity, 5 m/s and 10 m/s respectively ( $g = 10 m / s^{2}$ ). Find separation between them after one second.

13767.

Two particles A and B are thrown vertically upward with velocity, 5 m/s and 10 m/s respectively (g=10m/s2). Find separation between them after one second.

Answer»

Two particles A and B are thrown vertically upward with velocity, 5 m/s and 10 m/s respectively ( $g = 10 m / s^{2}$ ). Find separation between them after one second.

Discussion

13768.	One end of a massless spring of relaxed length 50 cm and spring constant k is fixed on top of a frictionless inclined plane of inclination θ=30∘ as shown in figure. When a mass m = 1.5 kg is attached at the other end, the spring extends by 2.5 cm. The mass is displaced slightly and released. The time period (in seconds) of the resulting oscillation will be
Answer» One end of a massless spring of relaxed length 50 cm and spring constant k is fixed on top of a frictionless inclined plane of inclination $θ = 30^{\circ}$ as shown in figure. When a mass m = 1.5 kg is attached at the other end, the spring extends by 2.5 cm. The mass is displaced slightly and released. The time period (in seconds) of the resulting oscillation will be

Discussion

13769.	Two parallel wires X and Y carry a current of 10 A and 8 A , they are separated by a distance of 5 cm. What is the force on a 11cm section of wire X?
Answer» Two parallel wires X and Y carry a current of 10 A and 8 A , they are separated by a distance of 5 cm. What is the force on a 11cm section of wire X?

Discussion

13770.	36. A bullet of mass 0.05 kg collides with a pendulumbob of mass 0.1 kg with initial velocity v andemerges with velocity The minimum value of v2so that the bob completes the vertical circularmotion (length of pendulum is 0.5 m, g 10 ms)(2) 10 m/s(1) 20 m/s(4) 15 m/s(3) 40 m/s
Answer» 36. A bullet of mass 0.05 kg collides with a pendulumbob of mass 0.1 kg with initial velocity v andemerges with velocity The minimum value of v2so that the bob completes the vertical circularmotion (length of pendulum is 0.5 m, g 10 ms)(2) 10 m/s(1) 20 m/s(4) 15 m/s(3) 40 m/s

Discussion

13771.	Ifthe velocity of the electron in Bohr’s first orbit is 2.19 ×106ms–1,calculate the de Broglie wavelength associated with it.
Answer» If the velocity of the electron in Bohr’s first orbit is 2.19 × 10⁶ ms^–1, calculate the de Broglie wavelength associated with it.

Discussion

13772.	A string of length 0.3 m and mass 10−2 kg is clamped at both its ends. The tension in the string is 1.2 N. When a pulse travels along the string, the shape the string is found to be the same at times t and t+Δt. The minimum value of Δt is 12k s. Find the value of k. ___
Answer» A string of length 0.3 m and mass $10^{- 2} k g$ is clamped at both its ends. The tension in the string is 1.2 N. When a pulse travels along the string, the shape the string is found to be the same at times t and $t + Δ t$ . The minimum value of $Δ t$ is $\frac{1}{2 k} s$ . Find the value of k. ___

Discussion

13773.	current flowing through a long conductor with round cross section with radius R.In which current density is varying radially.Then find the total current flowing through the cross section of given conductor
Answer» current flowing through a long conductor with round cross section with radius R.In which current density is varying radially.Then find the total current flowing through the cross section of given conductor

Discussion

13774.	A vehicle, with a horn of frequency n, is moving with a velocity of 30 m/s in a direction perpendicular to the straight line joining the observer and the vehicle. The observer perceives the sound to have a frequency n + n1. Then n1 is equal to (take velocity of sound in air as 330 m/s)
Answer» A vehicle, with a horn of frequency n, is moving with a velocity of 30 m/s in a direction perpendicular to the straight line joining the observer and the vehicle. The observer perceives the sound to have a frequency n + n₁. Then n₁ is equal to (take velocity of sound in air as 330 m/s)

Discussion

13775.	Four identical capacitors are connected as shown in diagram. When a battery of 6 V is connected between A and B, the charge stored is found to be 1.5 μC. The value of C1 is: -
Answer» Four identical capacitors are connected as shown in diagram. When a battery of $6 V$ is connected between A and B, the charge stored is found to be $1.5 μ C$ . The value of $C_{1}$ is: -

Discussion

13776.	what is diamagnetism?
Answer» what is diamagnetism?

Discussion

13777.	The shear force diagram of a given beam is shown in figure.The loading and bending moment diagram of the beam are
Answer» The shear force diagram of a given beam is shown in figure. The loading and bending moment diagram of the beam are

Discussion

13778.	why e/m ratio in case of proton depends on nature of gas whereas doesn't in case of electron.
Answer» why e/m ratio in case of proton depends on nature of gas whereas doesn't in case of electron.

Discussion

13779.	The number of turns per unit length of a solenoid is 10. If its average radius is 5 cm and it carries a current of 10 A, then the ratio of flux densities obtained at the centre and at the end on position on the axis will be -
Answer» The number of turns per unit length of a solenoid is $10.$ If its average radius is $5 cm$ and it carries a current of $10 A$ , then the ratio of flux densities obtained at the centre and at the end on position on the axis will be -

Discussion

13780.	94. A particle is projected horizontally with speed �u from point A, which is 10m above the ground. If particle hits the incline perpendicularly at point B. Find �u, length OB and speed at point B??
Answer» 94. A particle is projected horizontally with speed �u from point A, which is 10m above the ground. If particle hits the incline perpendicularly at point B. Find �u, length OB and speed at point B??

Discussion

13781.	54.A block of mass m moving with velocity Vo collides with another stationary block of mass M as shown. Maximum compression in the spring is
Answer» 54.A block of mass m moving with velocity Vo collides with another stationary block of mass M as shown. Maximum compression in the spring is

Discussion

13782.	A block of mass m is projected on a smooth horizontal circular track with speed v. What is the average normal force (in Newtons) exerted by circular walls on the block during its motion from A to B?
Answer» A block of mass $m$ is projected on a smooth horizontal circular track with speed $v$ . What is the average normal force (in Newtons) exerted by circular walls on the block during its motion from $A$ to $B$ ?

Discussion

13783.	two bodies each of mass m are intially at rest at infinite dis†an ce apart. now, they move towards each other under gravitational force. The relative velocity of approach at a seperation d between them is
Answer» two bodies each of mass m are intially at rest at infinite dis†an ce apart. now, they move towards each other under gravitational force. The relative velocity of approach at a seperation d between them is

Discussion

13784.	What doyou understand by ‘parametric shift of a line’? How doesa line shift when its (i) slope decreases, and (ii) its interceptincreases?
Answer» What do you understand by ‘parametric shift of a line’? How does a line shift when its (i) slope decreases, and (ii) its intercept increases?

Discussion

13785.	The length of needle floating on the surface of water is 2 cm. Find the force in addition to its weight required to lift needle from the water surface. (Surface tension of water =7.5 N/cm)
Answer» The length of needle floating on the surface of water is $2 cm$ . Find the force in addition to its weight required to lift needle from the water surface. (Surface tension of water $= 7.5 N/cm$ )

Discussion

13786.	The moment of resistance for the given section using limit state method, will be________ kNm.32.08
Answer» The moment of resistance for the given section using limit state method, will be________ kNm. 32.08

Discussion

13787.	Two radioactive nuclei A and B decay into C with decay constant λ and 2λ respectively. Initially, both A and B have the same number of nuclei N0. The rate of production of C after time τλ is αλN0, where τ is the half life of A. Find α.
Answer» Two radioactive nuclei A and B decay into C with decay constant $λ$ and $2 λ$ respectively. Initially, both A and B have the same number of nuclei $N_{0}$ . The rate of production of C after time $\frac{τ}{λ}$ is $α λ N_{0}$ , where $τ$ is the half life of A. Find $α$ .

Discussion

13788.	Is the relation between focal length and radius of curvature valid for lens ?
Answer» Is the relation between focal length and radius of curvature valid for lens ?

Discussion

13789.	The value of 8∫3sin√x+1√x+1dx is
Answer» The value of $8 \int 3 \frac{sin \sqrt{x + 1}}{\sqrt{x + 1}} d x$ is

Discussion

13790.	Why the sky looks light blue from the earth? In reality it is so dark.
Answer» Why the sky looks light blue from the earth? In reality it is so dark.

Discussion

13791.	If angle of minimum deviation by an equilateral prism is equal to its prism angle, then the refractive index of material of prism can be
Answer» If angle of minimum deviation by an equilateral prism is equal to its prism angle, then the refractive index of material of prism can be

Discussion

13792.	By sucking through a straw, a student can reduce the pressure in lungs to 750 mm of Hg (density= 13.6 grams / centimetre cube). using the staw, he can drink water from glass up to a maximum depth of 10 cm 75 cm 13.6 cm 1.36 cm
Answer» By sucking through a straw, a student can reduce the pressure in lungs to 750 mm of Hg (density= 13.6 grams / centimetre cube). using the staw, he can drink water from glass up to a maximum depth of 10 cm 75 cm 13.6 cm 1.36 cm

Discussion

13793.	prove that the path of a projectile with respect to another projectile is a straight line
Answer» prove that the path of a projectile with respect to another projectile is a straight line

Discussion

13794.	A batsman hits back a ball straight in the direction of the bowlerwithout changing its initial speed of 12 m/s. If the mass of the ball isO.15 kg, determine the impulse imparted to the ball. (Assume linear2.motion of the ball)(B) 3.6 Ns(A)4.6 Ns(D) O Ns(C) 2.6 Ns(E) None of these
Answer» A batsman hits back a ball straight in the direction of the bowlerwithout changing its initial speed of 12 m/s. If the mass of the ball isO.15 kg, determine the impulse imparted to the ball. (Assume linear2.motion of the ball)(B) 3.6 Ns(A)4.6 Ns(D) O Ns(C) 2.6 Ns(E) None of these

Discussion

13795.	Two identical bodies are there. The first one has a charge of 9 micro coulomb and the second one is uncharged. How will the charge be divided between the two bodies when they are connected by a conductin g wire and what is the new charge on both the bodies ?
Answer» Two identical bodies are there. The first one has a charge of 9 micro coulomb and the second one is uncharged. How will the charge be divided between the two bodies when they are connected by a conductin g wire and what is the new charge on both the bodies ?

Discussion

13796.	: A square glass plate of length 10 cm and thickness O.4 cm, weighs 40 g in air. It is held verticallysuch that its lower edge rests on water surface. What is the apparent weight of glass plate now?(Given surface tension of water 0.073 N m1)
Answer» : A square glass plate of length 10 cm and thickness O.4 cm, weighs 40 g in air. It is held verticallysuch that its lower edge rests on water surface. What is the apparent weight of glass plate now?(Given surface tension of water 0.073 N m1)

Discussion

13797.	A rectangular coil ABCD having a battery connected at its ends A and D is placed between the pole of ahorse-shoe magnet as shown below. For the given position of coil(i) What is the direction of force on each arm?(i) What is the effect of force on coil?
Answer» A rectangular coil ABCD having a battery connected at its ends A and D is placed between the pole of ahorse-shoe magnet as shown below. For the given position of coil(i) What is the direction of force on each arm?(i) What is the effect of force on coil?

Discussion

13798.	A car weighing 1400 kg is moving at a speed of 54km/hr up a hill when the motor stops. If it is just able to reach the destination which is at a height of 10m above the point, calculate the work done against friction
Answer» A car weighing 1400 kg is moving at a speed of 54km/hr up a hill when the motor stops. If it is just able to reach the destination which is at a height of 10m above the point, calculate the work done against friction

Discussion

13799.	A square loop of side a is rotating about its diagonal withangular velocity in a perpendicular magnetic field B. Ithas 10 turns. The e.m.f. induced is(a) B2 sinω t(b) B2 cos ω t(c) 5\sqrt2 Ba^2(d) 10Ba^2sin t
Answer» A square loop of side a is rotating about its diagonal withangular velocity in a perpendicular magnetic field B. Ithas 10 turns. The e.m.f. induced is(a) B2 sinω t(b) B2 cos ω t(c) 5\sqrt2 Ba^2(d) 10Ba^2sin t

Discussion

13800.	80.In the arrangement shown, all bulbs have same resistance. If bulb C gets fused then the brightness of bulb A will
Answer» 80.In the arrangement shown, all bulbs have same resistance. If bulb C gets fused then the brightness of bulb A will

Discussion

Explore topic-wise InterviewSolutions in .

A lossless transmission line having operating voltage VS=VR=400kV has surge impedance of 400 Ω. It is connected with a 25% of shunt capacitance compensation at the load end. If the generator is delivering a power of 200 MW through these lines, then the load angle δ of the generator in degree is

A small block is connected to one end of two identical massless strings of length 503 cm each with their other ends fixed to a vertical rod. If the ratio of tensions be 4:1, then what will be the angular velocity ω of the block.

In the given velocity-time graph, AB shows that the body has:

Two planets move around the sun. The periodic times and the mean radii of the orbits are T1,T2 and r1,r2 respectively. The ratio T1T2 is equal to.

If carnot engine works between 127 degree Celsius to 527 degree Celsius then it's efficiency isA) 25%B)37.5%C)50%D)75%

Discuss resonance and formal charge in N_3^- and N_2O?

A block of mass m is suspended by a light thread from an elevator. The elevator is accelerating upward with a uniform acceleration a. The work done by tension on the block in t seconds is (u=0)

Two successive resonance frequencies in an open organ pipe are 1944 Hz and 2592 Hz. Find the length of the tube. The speed of sound in air is 324 ms−1

A point source radiates energy at the rate of 10 Joules per second, or 10 Watts. As shown in the diagram, two spherical shells of radii r1 and r2 (r1 &lt; r2) receive energies E1 and E2 per second, respectively. Which of the following option(s) is/are true?

If the screw on a screw-gauge is given six rotations, it moves by 3 mm on the main scale. If there are 50 divisions on the circular scale, the least count of the screw gauge is:

A boy covers a distance AB of 2 km with speed of 2.5 km/hr, while going from A to B and comes back from B to A with speed 0.5 km/hr, his average speed will be

40.The average value of sawtooth voltage V=V^°{2t/T-1} over 0 to T/2 is given by

Two particles A and B are thrown vertically upward with velocity, 5 m/s and 10 m/s respectively (g=10m/s2). Find separation between them after one second.

Two parallel wires X and Y carry a current of 10 A and 8 A , they are separated by a distance of 5 cm. What is the force on a 11cm section of wire X?

36. A bullet of mass 0.05 kg collides with a pendulumbob of mass 0.1 kg with initial velocity v andemerges with velocity The minimum value of v2so that the bob completes the vertical circularmotion (length of pendulum is 0.5 m, g 10 ms)(2) 10 m/s(1) 20 m/s(4) 15 m/s(3) 40 m/s

Ifthe velocity of the electron in Bohr’s first orbit is 2.19 ×106ms–1,calculate the de Broglie wavelength associated with it.

A string of length 0.3 m and mass 10−2 kg is clamped at both its ends. The tension in the string is 1.2 N. When a pulse travels along the string, the shape the string is found to be the same at times t and t+Δt. The minimum value of Δt is 12k s. Find the value of k. ___

current flowing through a long conductor with round cross section with radius R.In which current density is varying radially.Then find the total current flowing through the cross section of given conductor

A vehicle, with a horn of frequency n, is moving with a velocity of 30 m/s in a direction perpendicular to the straight line joining the observer and the vehicle. The observer perceives the sound to have a frequency n + n1. Then n1 is equal to (take velocity of sound in air as 330 m/s)

Four identical capacitors are connected as shown in diagram. When a battery of 6 V is connected between A and B, the charge stored is found to be 1.5 μC. The value of C1 is: -

what is diamagnetism?

The shear force diagram of a given beam is shown in figure.The loading and bending moment diagram of the beam are

why e/m ratio in case of proton depends on nature of gas whereas doesn't in case of electron.

The number of turns per unit length of a solenoid is 10. If its average radius is 5 cm and it carries a current of 10 A, then the ratio of flux densities obtained at the centre and at the end on position on the axis will be -

94. A particle is projected horizontally with speed �u from point A, which is 10m above the ground. If particle hits the incline perpendicularly at point B. Find �u, length OB and speed at point B??

54.A block of mass m moving with velocity Vo collides with another stationary block of mass M as shown. Maximum compression in the spring is

A block of mass m is projected on a smooth horizontal circular track with speed v. What is the average normal force (in Newtons) exerted by circular walls on the block during its motion from A to B?

two bodies each of mass m are intially at rest at infinite dis†an ce apart. now, they move towards each other under gravitational force. The relative velocity of approach at a seperation d between them is

What doyou understand by ‘parametric shift of a line’? How doesa line shift when its (i) slope decreases, and (ii) its interceptincreases?

The length of needle floating on the surface of water is 2 cm. Find the force in addition to its weight required to lift needle from the water surface. (Surface tension of water =7.5 N/cm)

The moment of resistance for the given section using limit state method, will be________ kNm.32.08

Two radioactive nuclei A and B decay into C with decay constant λ and 2λ respectively. Initially, both A and B have the same number of nuclei N0. The rate of production of C after time τλ is αλN0, where τ is the half life of A. Find α.

Is the relation between focal length and radius of curvature valid for lens ?

The value of 8∫3sin√x+1√x+1dx is

Why the sky looks light blue from the earth? In reality it is so dark.

If angle of minimum deviation by an equilateral prism is equal to its prism angle, then the refractive index of material of prism can be

By sucking through a straw, a student can reduce the pressure in lungs to 750 mm of Hg (density= 13.6 grams / centimetre cube). using the staw, he can drink water from glass up to a maximum depth of 10 cm 75 cm 13.6 cm 1.36 cm

prove that the path of a projectile with respect to another projectile is a straight line

A batsman hits back a ball straight in the direction of the bowlerwithout changing its initial speed of 12 m/s. If the mass of the ball isO.15 kg, determine the impulse imparted to the ball. (Assume linear2.motion of the ball)(B) 3.6 Ns(A)4.6 Ns(D) O Ns(C) 2.6 Ns(E) None of these

Two identical bodies are there. The first one has a charge of 9 micro coulomb and the second one is uncharged. How will the charge be divided between the two bodies when they are connected by a conductin g wire and what is the new charge on both the bodies ?

: A square glass plate of length 10 cm and thickness O.4 cm, weighs 40 g in air. It is held verticallysuch that its lower edge rests on water surface. What is the apparent weight of glass plate now?(Given surface tension of water 0.073 N m1)

A rectangular coil ABCD having a battery connected at its ends A and D is placed between the pole of ahorse-shoe magnet as shown below. For the given position of coil(i) What is the direction of force on each arm?(i) What is the effect of force on coil?

A car weighing 1400 kg is moving at a speed of 54km/hr up a hill when the motor stops. If it is just able to reach the destination which is at a height of 10m above the point, calculate the work done against friction

A square loop of side a is rotating about its diagonal withangular velocity in a perpendicular magnetic field B. Ithas 10 turns. The e.m.f. induced is(a) B2 sinω t(b) B2 cos ω t(c) 5\sqrt2 Ba^2(d) 10Ba^2sin t

80.In the arrangement shown, all bulbs have same resistance. If bulb C gets fused then the brightness of bulb A will

A point source radiates energy at the rate of 10 Joules per second, or 10 Watts. As shown in the diagram, two spherical shells of radii r1 and r2 (r1 < r2) receive energies E1 and E2 per second, respectively. Which of the following option(s) is/are true?