50278 + Interview Questions in Physics Page 135 InterviewSolution

6701.	14.A wooden is taken to the bottom of a lake of water and then released. It rises up with a 1-constant acceleration 2-decreasing acceleration 3-constant velocity 4-decreasing velocity
Answer» 14.A wooden is taken to the bottom of a lake of water and then released. It rises up with a 1-constant acceleration 2-decreasing acceleration 3-constant velocity 4-decreasing velocity

Discussion

6702.	In an electromagnetic wave in free space, the root mean square value of the electric field is Erms=6 Vm−1. The peak value of the magnetic field is
Answer» In an electromagnetic wave in free space, the root mean square value of the electric field is $E_{r m s} = 6 V m^{- 1}$ . The peak value of the magnetic field is

Discussion

6703.	A rectangular solid box of length 0.3 m is held horizontally, with one of its sides on the edge of a platform of height 5 m. When released, it slips off the table in a very short time τ=0.01 s, remaining essentially horizontal. The angle by which it would rotate when it hits the ground will be (in radians) close to:
Answer» A rectangular solid box of length $0.3 m$ is held horizontally, with one of its sides on the edge of a platform of height $5 m$ . When released, it slips off the table in a very short time $τ = 0.01 s$ , remaining essentially horizontal. The angle by which it would rotate when it hits the ground will be (in radians) close to:

Discussion

6704.	Four charges equal to –Q are placed at the four corners of a square and a charge q is at its centre. If the system is in equilibrium the value of q is
Answer» Four charges equal to –Q are placed at the four corners of a square and a charge q is at its centre. If the system is in equilibrium the value of q is

Discussion

6705.	68 The displacement x of a body having relation with timeasx=3t^2-6t+7,then distance covered by the body inthefirsttwosecondis\lbrack wherexisinmeterandtisinsecond\rbrack?
Answer» 68 The displacement x of a body having relation with timeasx=3t^2-6t+7,then distance covered by the body inthefirsttwosecondis\lbrack wherexisinmeterandtisinsecond\rbrack?

Discussion

6706.	A ball falls freely from height of 45m. When the ball is at the height of 25m, it explodes into two equal peices, one of them moves horizontally with speed 10m/s. What is the distance between the two peices on the ground?
Answer» A ball falls freely from height of 45m. When the ball is at the height of 25m, it explodes into two equal peices, one of them moves horizontally with speed 10m/s. What is the distance between the two peices on the ground?

Discussion

6707.	Why is r cubed in vector notation of universal law of gravitation?
Answer» Why is r cubed in vector notation of universal law of gravitation?

Discussion

6708.	For the given diagram for what maximum value of force both block will move together?
Answer» For the given diagram for what maximum value of force both block will move together?

Discussion

6709.	50.Does energy produce by the rotation of Earth and the celestial bodies in space
Answer» 50.Does energy produce by the rotation of Earth and the celestial bodies in space

Discussion

6710.	A beam of diameter d is incident on a glass hemisphere as shown in figure. If the radius of curvature of the hemisphere is very large in comparison to d, then diameter of the beam at the base of the hemisphere will be
Answer» A beam of diameter d is incident on a glass hemisphere as shown in figure. If the radius of curvature of the hemisphere is very large in comparison to d, then diameter of the beam at the base of the hemisphere will be

6710.

A beam of diameter d is incident on a glass hemisphere as shown in figure. If the radius of curvature of the hemisphere is very large in comparison to d, then diameter of the beam at the base of the hemisphere will be

Answer»

A beam of diameter d is incident on a glass hemisphere as shown in figure. If the radius of curvature of the hemisphere is very large in comparison to d, then diameter of the beam at the base of the hemisphere will be

Discussion

6711.	Find the maximum force F to be applied for the system shown, so that the two blocks move together. Given that it accelerates with 2 m/s2. Take g=10 m/s2. (μ1=0.2, μ2=0.3)
Answer» Find the maximum force $F$ to be applied for the system shown, so that the two blocks move together. Given that it accelerates with $2 {m/s}^{2}$ . Take $g = 10 {m/s}^{2}$ . $(μ_{1} = 0.2, μ_{2} = 0.3)$

Discussion

6712.	A conductor ABOCD moves along its bisector with a velocity of 1 ms−1 through a perpendicular magnetic field of 1 (Wb)m−2 as shown in the figure. If all the four sides are of 1 m length each, then the induced emf between point A and D is
Answer» A conductor ABOCD moves along its bisector with a velocity of $1 m s^{- 1}$ through a perpendicular magnetic field of $1 (W b) m^{- 2}$ as shown in the figure. If all the four sides are of $1 m$ length each, then the induced emf between point A and D is

Discussion

6713.	a balloon of gross weight W is falling vertically downward with a cons†an t accelaration a(
Answer» a balloon of gross weight W is falling vertically downward with a cons†an t accelaration a(

Discussion

6714.	Let →a=2^i+^j−2^k and →b=^i+^j. If →c is a vector such that →a⋅→c=∣∣→c∣∣, ∣∣→c−→a∣∣=2√2 and the angle between (→a×→b) and →c is π6, then the value of ∣∣∣(→a×→b)×→c∣∣∣ is
Answer» Let $\to a = 2^i +^j - 2^k$ and $\to b =^i +^j .$ If $\to c$ is a vector such that $\to a \cdot \to c = ∣ ∣ \to c ∣ ∣,$ $∣ ∣ \to c - \to a ∣ ∣ = 2 \sqrt{2}$ and the angle between $(\to a \times \to b)$ and $\to c$ is $\frac{π}{6},$ then the value of $∣ ∣ ∣ (\to a \times \to b) \times \to c ∣ ∣ ∣$ is

Discussion

6715.	A particle is projected with speed vo (upwards) atan angle 0 from horizontal. The average velocity ofparticle between point of projection and highestpoint on the trajectory, is0(2) 1+3cos2V1+3cos2030o1+3sin20/1+3sin20(4)(3)3
Answer» A particle is projected with speed vo (upwards) atan angle 0 from horizontal. The average velocity ofparticle between point of projection and highestpoint on the trajectory, is0(2) 1+3cos2V1+3cos2030o1+3sin20/1+3sin20(4)(3)3

Discussion

6716.	In the circuit shown in figure, the voltmeter reading would be
Answer» In the circuit shown in figure, the voltmeter reading would be

Discussion

6717.	The magnetic field in a travelling electromagnetic wave has a peak value of 20 nT. The peak value of electric field strength is
Answer» The magnetic field in a travelling electromagnetic wave has a peak value of 20 nT. The peak value of electric field strength is

Discussion

6718.	The net electric force on a charge of +3μ C at the mid-point on the line joining two charges of magnitude+2 μ C and -2C separated by the distance of 6 mm is(a) 6000 N(c) 60 N(b) 500 N(d) zero
Answer» The net electric force on a charge of +3μ C at the mid-point on the line joining two charges of magnitude+2 μ C and -2C separated by the distance of 6 mm is(a) 6000 N(c) 60 N(b) 500 N(d) zero

Discussion

6719.	Calculate the amount of current
Answer» Calculate the amount of current

Discussion

6720.	A parallel beam of light of wavelength 500 nm falls on a narrow slitand the resulting diffraction pattern is observed on a screen 1 maway. It is observed that the first minimum is at a distance of 2.5mm from the centre of the screen. Find the width of the slit.
Answer» A parallel beam of light of wavelength 500 nm falls on a narrow slitand the resulting diffraction pattern is observed on a screen 1 maway. It is observed that the first minimum is at a distance of 2.5mm from the centre of the screen. Find the width of the slit.

Discussion

6721.	The work function of metal is 1 eV. Light of wavelength 3000∘A is incident on this metal surface. The velocity of emitted photo-electrons will be
Answer» The work function of metal is 1 eV. Light of wavelength $3000 \circ A$ is incident on this metal surface. The velocity of emitted photo-electrons will be

Discussion

6722.	A magnetising field of 5000 A/m produces a magnetic flux of 5×10−5 wb in an iron rod is 0.5 cm2, then the permeability of the rod will be (in H/m)
Answer» A magnetising field of $5000 A/m$ produces a magnetic flux of $5 \times 10^{- 5} wb$ in an iron rod is $0.5 {cm}^{2}$ , then the permeability of the rod will be (in $H/m$ )

Discussion

6723.	What are the laws of motion?
Answer» What are the laws of motion?

Discussion

6724.	A spherical mirror having focal length f=−25 cm is used to obtain an image which is of the same size as that of the object. What should be the object distance (u) as per sign convention?
Answer» A spherical mirror having focal length $f = - 25 cm$ is used to obtain an image which is of the same size as that of the object. What should be the object distance $(u)$ as per sign convention?

Discussion

6725.	A current of 2 A flows through a 2 Ω resistance when connected across a battery. The same battery supplies a current of 0.5 A when connected across a 9 Ω resistor. The internal resistance of the battery is
Answer» A current of 2 $A$ flows through a $2 Ω$ resistance when connected across a battery. The same battery supplies a current of 0.5 $A$ when connected across a $9 Ω$ resistor. The internal resistance of the battery is

Discussion

6726.	Potential energy of a particle is given by U=x2−6x+29. Locate the position where the particle is in stable equilibrium.
Answer» Potential energy of a particle is given by $U = x^{2} - 6 x + 29$ . Locate the position where the particle is in stable equilibrium.

Discussion

6727.	A charge of 20 μC is placed on the positive plate of an isolated parallel-plate capacitor of capacitance 10 μF. Calculate the potential difference developed between the plates.
Answer» A charge of $20 μ C$ is placed on the positive plate of an isolated parallel-plate capacitor of capacitance $10 μ F .$ Calculate the potential difference developed between the plates.

Discussion

6728.	A smooth chain AB of mass m rests against a surface in the form of a quarter-circle of radius R. If it is released from rest, the velocity of the chain after it comes over the horizontal part of the surface is
Answer» A smooth chain $AB$ of mass $m$ rests against a surface in the form of a quarter-circle of radius $R$ . If it is released from rest, the velocity of the chain after it comes over the horizontal part of the surface is

Discussion

6729.	Figure( 6-E12) shows a small block of mass m kept at the left end of a larger block of mass M and length l. The system can slide on a horizontal road. The system is started towards right with an initial velocity v. The friction coefficientbetween the road and the bigger block is μ and that between the block is μ2. Find the time elapsed before the smaller blocks separates from the bigger block.
Answer» Figure( 6-E12) shows a small block of mass m kept at the left end of a larger block of mass M and length l. The system can slide on a horizontal road. The system is started towards right with an initial velocity v. The friction coefficientbetween the road and the bigger block is $μ$ and that between the block is $\frac{μ}{2}$ . Find the time elapsed before the smaller blocks separates from the bigger block.

Discussion

6730.	58. A container has two immiscible liquids of densities rho1 and rho2 .a capilary tube of radius r is inserted in the liquid so that it's bottom reaches upto the denser liquid. The denser liquid rises in the capilary and attains a hight h from the interface of the liquids which is equal to the column of the lighter liquid .assuming angle of contact to be 0,the surface tension of the heavier liquid is
Answer» 58. A container has two immiscible liquids of densities rho1 and rho2 .a capilary tube of radius r is inserted in the liquid so that it's bottom reaches upto the denser liquid. The denser liquid rises in the capilary and attains a hight h from the interface of the liquids which is equal to the column of the lighter liquid .assuming angle of contact to be 0,the surface tension of the heavier liquid is

Discussion

6731.	A stone is dropped from a height h. It hits the ground with a certain momentum P. If the same stone is dropped from a height 100% more than the previous height, the momentum when it hits the ground will change by (1) 68% (2) 41% (3) 200% (4) 100%
Answer» A stone is dropped from a height h. It hits the ground with a certain momentum P. If the same stone is dropped from a height 100% more than the previous height, the momentum when it hits the ground will change by (1) 68% (2) 41% (3) 200% (4) 100%

Discussion

6732.	A horizontal force of 2 N is applied to a box placed on a flat surface, and it is still at rest. What will be the correct representation of the free body diagram?
Answer» A horizontal force of 2 N is applied to a box placed on a flat surface, and it is still at rest. What will be the correct representation of the free body diagram?

Discussion

6733.	Find the minimum value of coefficient of friction between the 6 kg block and the surface if the system shown does not accelerate.
Answer» Find the minimum value of coefficient of friction between the $6 k g$ block and the surface if the system shown does not accelerate.

Discussion

6734.	Two simple harmonic motions are represented by the equations Y1=0.1 sin(100 π t+π3) and Y2=0.1 cos π t. The phase of velocity of particle 1 with respect to the velocity of particle 2 at time t=0 is
Answer» Two simple harmonic motions are represented by the equations $Y_{1} = 0.1 sin (100 π t + \frac{π}{3}) and Y_{2} = 0.1 c o s π t .$ The phase of velocity of particle 1 with respect to the velocity of particle 2 at time $t = 0$ is

Discussion

6735.	6.Two masses m1 and m2 are placed at a separation r. Find out the moment of inertia of the system about an axis passing through its centre of mass and perpendicular to the line joining the masses.
Answer» 6.Two masses m1 and m2 are placed at a separation r. Find out the moment of inertia of the system about an axis passing through its centre of mass and perpendicular to the line joining the masses.

Discussion

6736.	A compound microscope consists of an objective lens of focal length 1 cm and an eye piece of focal length 5 cm with a separation of 10 cm. The distance between an object and the objective lens, at which the strain on the eye is minimum is n40 cm. The value of n is
Answer» A compound microscope consists of an objective lens of focal length $1 cm$ and an eye piece of focal length $5 cm$ with a separation of $10 cm$ . The distance between an object and the objective lens, at which the strain on the eye is minimum is $\frac{n}{40} cm$ . The value of $n$ is

Discussion

6737.	A 100 μFcapacitor in series with a 40 Ω resistanceis connected to a 110 V, 60 Hz supply.(a) What is themaximum current in the circuit?(b) What is thetime lag between the current maximum and the voltage maximum?
Answer» A 100 μF capacitor in series with a 40 Ω resistance is connected to a 110 V, 60 Hz supply. (a) What is the maximum current in the circuit? (b) What is the time lag between the current maximum and the voltage maximum?

6737.

A 100 μFcapacitor in series with a 40 Ω resistanceis connected to a 110 V, 60 Hz supply.(a) What is themaximum current in the circuit?(b) What is thetime lag between the current maximum and the voltage maximum?

Answer»

A 100 μF
capacitor in series with a 40 Ω resistance
is connected to a 110 V, 60 Hz supply.

(a) What is the
maximum current in the circuit?

(b) What is the
time lag between the current maximum and the voltage maximum?

Discussion

6738.	The friction coefficient between the horizontal surface and each of the blocks shown in figure is 0.20. The collision between the blocks is perfectly elastic. Find the separation between the two blocks when they come to rest. Take g = 10 m/s2.
Answer» The friction coefficient between the horizontal surface and each of the blocks shown in figure is 0.20. The collision between the blocks is perfectly elastic. Find the separation between the two blocks when they come to rest. Take $g$ = 10 $m / s^{2}$ .

6738.

The friction coefficient between the horizontal surface and each of the blocks shown in figure is 0.20. The collision between the blocks is perfectly elastic. Find the separation between the two blocks when they come to rest. Take g = 10 m/s2.

Answer»

The friction coefficient between the horizontal surface and each of the blocks shown in figure is 0.20. The collision between the blocks is perfectly elastic. Find the separation between the two blocks when they come to rest. Take $g$ = 10 $m / s^{2}$ .

Discussion

6739.	the wavelength of electron and wavelength of photon of same energy E are related as
Answer» the wavelength of electron and wavelength of photon of same energy E are related as

Discussion

6740.	Find the domain of 1/√[x]-x
Answer» Find the domain of 1/√[x]-x

Discussion

6741.	Determine the water equivalent of 4.5 kg of antimony. Take specific heat of antimony and water as 0.210 kJ/kg K and 4.20 kJ/kg K respectively.
Answer» Determine the water equivalent of $4.5 kg$ of antimony. Take specific heat of antimony and water as $0.210 kJ/kg K$ and $4.20 kJ/kg K$ respectively.

Discussion

6742.	A particle vibrates in SHM along a straight line. Its greatest acceleration is 5π2 cm s−2 and when its distance from the equilibrium position is 4cm, the velocity of the particle is 3π2 cm s−2. The amplitude and the period of oscillation of the vibrating particle(in SI units) are a and T respectively.Report the sum of numerical values of (a+T)
Answer» A particle vibrates in SHM along a straight line. Its greatest acceleration is $5 π^{2} {cm s}^{- 2}$ and when its distance from the equilibrium position is $4 cm$ , the velocity of the particle is $3 π^{2} {cm s}^{- 2}$ . The amplitude and the period of oscillation of the vibrating particle(in SI units) are $a$ and $T$ respectively. Report the sum of numerical values of $(a + T)$

Discussion

6743.	A conducting circular loop of radius r carries a constant current i. It is placed in a uniform magnetic field , such that is perpendicular to the plane of the loop. The magnetic force acting on the loop is?[BIT 1992; MP PET 1994; IIT 1983;MP PMT 1999; AMU (Engg.) 2000]
Answer» A conducting circular loop of radius r carries a constant current i. It is placed in a uniform magnetic field , such that is perpendicular to the plane of the loop. The magnetic force acting on the loop is? [BIT 1992; MP PET 1994; IIT 1983;MP PMT 1999; AMU (Engg.) 2000]

6743.

A conducting circular loop of radius r carries a constant current i. It is placed in a uniform magnetic field , such that is perpendicular to the plane of the loop. The magnetic force acting on the loop is?[BIT 1992; MP PET 1994; IIT 1983;MP PMT 1999; AMU (Engg.) 2000]

Answer»

A conducting circular loop of radius r carries a constant current i. It is placed in a uniform magnetic field , such that is perpendicular to the plane of the loop. The magnetic force acting on the loop is?

[BIT 1992; MP PET 1994; IIT 1983;MP PMT 1999; AMU (Engg.) 2000]

Discussion

6744.	The wavelength of de-Broglie wave is 2 μm, then its momentum is, h=6.63×10−34 J-s
Answer» The wavelength of de-Broglie wave is $2 μ m$ , then its momentum is, $h = 6.63 \times 10^{- 34} J-s$

Discussion

6745.	Each situation in column I gives graph of a particle moving in circular path. The variables and t represent angular speed (at any time t ), angular displacement (in time t) and time respectively. Column II gives certain resulting interpretation. Match the graphs in column I with statements in column II.
Answer» Each situation in column I gives graph of a particle moving in circular path. The variables and t represent angular speed (at any time t ), angular displacement (in time t) and time respectively. Column II gives certain resulting interpretation. Match the graphs in column I with statements in column II.

Discussion

6746.	A train accelerating uniformly from rest attains a maximum speed of 40 ms−1 in 20 s. It travels at this speed for 20 s and is brought to rest under uniform retardation in further 40 s. What is the average velocity during this period?
Answer» A train accelerating uniformly from rest attains a maximum speed of 40 $m s^{- 1}$ in 20 s. It travels at this speed for 20 s and is brought to rest under uniform retardation in further 40 s. What is the average velocity during this period?

Discussion

6747.	In terms of time period of oscillation T, what will be the shortest time in moving a particle from +A2 to −√32A?
Answer» In terms of time period of oscillation $T$ , what will be the shortest time in moving a particle from $+ \frac{A}{2}$ to $- \frac{\sqrt{3}}{2} A$ ?

Discussion

6748.	Two coherent sources emit light waves which superimpose at a point and are expressed as E1=E0sin(ωt+π/4)E2=2E0sin(ωt−π/4)Here, E1 and E2 are the electric field strengths of the two waves at the given point. If I is the intensity of wave expressed by field strength E1 . The resultant intensity istimes I.
Answer» Two coherent sources emit light waves which superimpose at a point and are expressed as $\begin{matrix} E_{1} = E_{0} sin (ω t + π / 4) E_{2} = 2 E_{0} sin (ω t - π / 4) \end{matrix}$ Here, $E_{1}$ and $E_{2}$ are the electric field strengths of the two waves at the given point. If $I$ is the intensity of wave expressed by field strength $E_{1}$ . The resultant intensity istimes $I$ .

Discussion

6749.	Find the remainder when 5 raised to the power 97 is divided by 97
Answer» Find the remainder when 5 raised to the power 97 is divided by 97

Discussion

6750.	A battery of 12V emf and internal resis†an ce of 4 ia connected to a variable resistor . The maximum rate at which chemical energy is converted into electrical energy
Answer» A battery of 12V emf and internal resis†an ce of 4 ia connected to a variable resistor . The maximum rate at which chemical energy is converted into electrical energy

Discussion

Explore topic-wise InterviewSolutions in .

14.A wooden is taken to the bottom of a lake of water and then released. It rises up with a 1-constant acceleration 2-decreasing acceleration 3-constant velocity 4-decreasing velocity

In an electromagnetic wave in free space, the root mean square value of the electric field is Erms=6 Vm−1. The peak value of the magnetic field is

Four charges equal to –Q are placed at the four corners of a square and a charge q is at its centre. If the system is in equilibrium the value of q is

68 The displacement x of a body having relation with timeasx=3t^2-6t+7,then distance covered by the body inthefirsttwosecondis\lbrack wherexisinmeterandtisinsecond\rbrack?

A ball falls freely from height of 45m. When the ball is at the height of 25m, it explodes into two equal peices, one of them moves horizontally with speed 10m/s. What is the distance between the two peices on the ground?

Why is r cubed in vector notation of universal law of gravitation?

For the given diagram for what maximum value of force both block will move together?

50.Does energy produce by the rotation of Earth and the celestial bodies in space

A beam of diameter d is incident on a glass hemisphere as shown in figure. If the radius of curvature of the hemisphere is very large in comparison to d, then diameter of the beam at the base of the hemisphere will be

Find the maximum force F to be applied for the system shown, so that the two blocks move together. Given that it accelerates with 2 m/s2. Take g=10 m/s2. (μ1=0.2, μ2=0.3)

A conductor ABOCD moves along its bisector with a velocity of 1 ms−1 through a perpendicular magnetic field of 1 (Wb)m−2 as shown in the figure. If all the four sides are of 1 m length each, then the induced emf between point A and D is

a balloon of gross weight W is falling vertically downward with a cons†an t accelaration a(

Let →a=2^i+^j−2^k and →b=^i+^j. If →c is a vector such that →a⋅→c=∣∣→c∣∣, ∣∣→c−→a∣∣=2√2 and the angle between (→a×→b) and →c is π6, then the value of ∣∣∣(→a×→b)×→c∣∣∣ is

A particle is projected with speed vo (upwards) atan angle 0 from horizontal. The average velocity ofparticle between point of projection and highestpoint on the trajectory, is0(2) 1+3cos2V1+3cos2030o1+3sin20/1+3sin20(4)(3)3

In the circuit shown in figure, the voltmeter reading would be

The magnetic field in a travelling electromagnetic wave has a peak value of 20 nT. The peak value of electric field strength is

The net electric force on a charge of +3μ C at the mid-point on the line joining two charges of magnitude+2 μ C and -2C separated by the distance of 6 mm is(a) 6000 N(c) 60 N(b) 500 N(d) zero

Calculate the amount of current

A parallel beam of light of wavelength 500 nm falls on a narrow slitand the resulting diffraction pattern is observed on a screen 1 maway. It is observed that the first minimum is at a distance of 2.5mm from the centre of the screen. Find the width of the slit.

The work function of metal is 1 eV. Light of wavelength 3000∘A is incident on this metal surface. The velocity of emitted photo-electrons will be

A magnetising field of 5000 A/m produces a magnetic flux of 5×10−5 wb in an iron rod is 0.5 cm2, then the permeability of the rod will be (in H/m)

What are the laws of motion?

A spherical mirror having focal length f=−25 cm is used to obtain an image which is of the same size as that of the object. What should be the object distance (u) as per sign convention?

A current of 2 A flows through a 2 Ω resistance when connected across a battery. The same battery supplies a current of 0.5 A when connected across a 9 Ω resistor. The internal resistance of the battery is

Potential energy of a particle is given by U=x2−6x+29. Locate the position where the particle is in stable equilibrium.

A charge of 20 μC is placed on the positive plate of an isolated parallel-plate capacitor of capacitance 10 μF. Calculate the potential difference developed between the plates.

A smooth chain AB of mass m rests against a surface in the form of a quarter-circle of radius R. If it is released from rest, the velocity of the chain after it comes over the horizontal part of the surface is

A stone is dropped from a height h. It hits the ground with a certain momentum P. If the same stone is dropped from a height 100% more than the previous height, the momentum when it hits the ground will change by (1) 68% (2) 41% (3) 200% (4) 100%

A horizontal force of 2 N is applied to a box placed on a flat surface, and it is still at rest. What will be the correct representation of the free body diagram?

Find the minimum value of coefficient of friction between the 6 kg block and the surface if the system shown does not accelerate.

Two simple harmonic motions are represented by the equations Y1=0.1 sin(100 π t+π3) and Y2=0.1 cos π t. The phase of velocity of particle 1 with respect to the velocity of particle 2 at time t=0 is

6.Two masses m1 and m2 are placed at a separation r. Find out the moment of inertia of the system about an axis passing through its centre of mass and perpendicular to the line joining the masses.

A compound microscope consists of an objective lens of focal length 1 cm and an eye piece of focal length 5 cm with a separation of 10 cm. The distance between an object and the objective lens, at which the strain on the eye is minimum is n40 cm. The value of n is

A 100 μFcapacitor in series with a 40 Ω resistanceis connected to a 110 V, 60 Hz supply.(a) What is themaximum current in the circuit?(b) What is thetime lag between the current maximum and the voltage maximum?

The friction coefficient between the horizontal surface and each of the blocks shown in figure is 0.20. The collision between the blocks is perfectly elastic. Find the separation between the two blocks when they come to rest. Take g = 10 m/s2.

the wavelength of electron and wavelength of photon of same energy E are related as

Find the domain of 1/√[x]-x

Determine the water equivalent of 4.5 kg of antimony. Take specific heat of antimony and water as 0.210 kJ/kg K and 4.20 kJ/kg K respectively.

A conducting circular loop of radius r carries a constant current i. It is placed in a uniform magnetic field , such that is perpendicular to the plane of the loop. The magnetic force acting on the loop is?[BIT 1992; MP PET 1994; IIT 1983;MP PMT 1999; AMU (Engg.) 2000]

The wavelength of de-Broglie wave is 2 μm, then its momentum is, h=6.63×10−34 J-s

A train accelerating uniformly from rest attains a maximum speed of 40 ms−1 in 20 s. It travels at this speed for 20 s and is brought to rest under uniform retardation in further 40 s. What is the average velocity during this period?

In terms of time period of oscillation T, what will be the shortest time in moving a particle from +A2 to −√32A?

Find the remainder when 5 raised to the power 97 is divided by 97

A battery of 12V emf and internal resis†an ce of 4 ia connected to a variable resistor . The maximum rate at which chemical energy is converted into electrical energy