50278 + Interview Questions in Physics

1.	A sphere of radius 1.00 cm is placed in the path of a parallel beam of light of large aperture. The intensity of the light is 0.50 W cm−2. If the sphere completely absorbs the radiation falling on it, find the force exerted by the light beam on the sphere.
Answer» A sphere of radius 1.00 cm is placed in the path of a parallel beam of light of large aperture. The intensity of the light is 0.50 W $c m^{- 2}$ . If the sphere completely absorbs the radiation falling on it, find the force exerted by the light beam on the sphere.

Discussion

2.	A circular disc of radius R is removed from a bigger circular disc of radius 2R such that their circumferences coincide. The centre of mass of the new disc is at a distance of αR from the centre of the bigger disc. The value of α is
Answer» A circular disc of radius $R$ is removed from a bigger circular disc of radius $2 R$ such that their circumferences coincide. The centre of mass of the new disc is at a distance of $α R$ from the centre of the bigger disc. The value of $α$ is

Discussion

3.	Three charges each of +4μC are the corners B, C, D of a square ABCD of side 1m. The electric field at the centre ‘O’ of the square is
Answer» Three charges each of $+ 4 μ C$ are the corners B, C, D of a square ABCD of side 1m. The electric field at the centre ‘O’ of the square is

Discussion

4.	If mean square of x− component of the velocity of molecules is denoted by ω2, then R.M.S velocity of molecules will be
Answer» If mean square of $x -$ component of the velocity of molecules is denoted by $ω^{2}$ , then R.M.S velocity of molecules will be

Discussion

5.	Find the increase in pressure required to decrease the volume of a water sample by 0.01%. Bulk modulus of water = 2.1×109Nm−2
Answer» Find the increase in pressure required to decrease the volume of a water sample by $0.01 %$ . Bulk modulus of water = $2.1 \times 10^{9} N m^{- 2}$

Discussion

6.	Consider the situation shown in figure. Initially the spring is unstretched when the system is released from rest. Assuming no friction in the pulley, find the maximum elongation of the spring?
Answer» Consider the situation shown in figure. Initially the spring is unstretched when the system is released from rest. Assuming no friction in the pulley, find the maximum elongation of the spring?

6.

Consider the situation shown in figure. Initially the spring is unstretched when the system is released from rest. Assuming no friction in the pulley, find the maximum elongation of the spring?

Answer»

Consider the situation shown in figure. Initially the spring is unstretched when the system is released from rest. Assuming no friction in the pulley, find the maximum elongation of the spring?

Discussion

7.	A cylindrical vessel partially filled with water is rotated about its vertical central axis. It’s surface will
Answer» A cylindrical vessel partially filled with water is rotated about its vertical central axis. It’s surface will

Discussion

8.	Water enters through end A with a speed v1 and leaves through end B with a speed v2 of a cylindrical tube AB. The tube is always completely filled with water. In case I the tube is horizontal, in case II it is vertical with the end A upward and in case III it is vertical with the end B upward. We have v1 = v2 for
Answer» Water enters through end A with a speed v₁ and leaves through end B with a speed v₂ of a cylindrical tube AB. The tube is always completely filled with water. In case I the tube is horizontal, in case II it is vertical with the end A upward and in case III it is vertical with the end B upward. We have v₁ = v₂ for

Discussion

9.	A particle is moving in a circle of radius r=2 m. Its speed with time varies according to the relation v(t)=4−6t2. What is the magnitude of the total acceleration of the particle at t=2 sec ? Use the value of √769=27.73 for calculation.
Answer» A particle is moving in a circle of radius $r = 2 m$ . Its speed with time varies according to the relation $v (t) = 4 - \frac{6}{t^{2}}$ . What is the magnitude of the total acceleration of the particle at $t = 2 sec$ ? Use the value of $\sqrt{769} = 27.73$ for calculation.

Discussion

10.	A bob of mass M is suspended through a massless string of length L. The horizontal velocity at position A is sufficient enough to make it reach at point B. The angle at which the speed of bob is half of that at A, satisfies
Answer» A bob of mass $M$ is suspended through a massless string of length $L$ . The horizontal velocity at position $A$ is sufficient enough to make it reach at point $B$ . The angle at which the speed of bob is half of that at $A$ , satisfies

Discussion

11.	Energy of a photon E = hv and momentum of a photon p=hλ , then velocity of the photon is
Answer» Energy of a photon E = hv and momentum of a photon $p = \frac{h}{λ}$ , then velocity of the photon is

Discussion

12.	Four harmonic waves of equal frequencies and equal intensities I0 have phase angles 0,π3,2π3 and π. When they are superposed, the intensity of the resulting wave is nI0. The value of n is ___
Answer» Four harmonic waves of equal frequencies and equal intensities $I_{0}$ have phase angles $0, \frac{π}{3}, \frac{2 π}{3} a n d π$ . When they are superposed, the intensity of the resulting wave is $n I_{0}$ . The value of n is ___

Discussion

13.	The masses of three wires of copper are in the ratio of 1:3:5 and their lengths are in the ratio 5:3:1. The ratio of their electrical resistance is :
Answer» The masses of three wires of copper are in the ratio of 1:3:5 and their lengths are in the ratio 5:3:1. The ratio of their electrical resistance is :

Discussion

14.	A non conducting disc of radius R is rotating about an axis passing through its centre and perpendicular to its plane with an angular velocity ω. Charge q is uniformly distributed over its surface. The magnetic moment of the disc is
Answer» A non conducting disc of radius R is rotating about an axis passing through its centre and perpendicular to its plane with an angular velocity $ω$ . Charge q is uniformly distributed over its surface. The magnetic moment of the disc is

Discussion

15.	In a A.C. circuit, V and I are given by V = 100sin (100t) volt, I = 100 sin (100t+π3) A then the power dissipated in the circuit is
Answer» In a A.C. circuit, V and I are given by V = 100sin (100t) volt, I = 100 sin $(100 t + \frac{π}{3})$ A then the power dissipated in the circuit is

Discussion

16.	The potential energy of particle following S.H.M at mean position is 6 Joules and kinetic energy of particle at X=A√2 is 8 Joules, find energy of oscillation.
Answer» The potential energy of particle following S.H.M at mean position is $6 Joules$ and kinetic energy of particle at $X = \frac{A}{\sqrt{2}}$ is $8 Joules$ , find energy of oscillation.

Discussion

17.	Two long wires AB and CD carry currents i1 and i2 in the direction shown in figure.
Answer» Two long wires AB and CD carry currents i₁ and i₂ in the direction shown in figure.

17.

Two long wires AB and CD carry currents i1 and i2 in the direction shown in figure.

Answer»

Two long wires AB and CD carry currents i₁ and i₂ in the direction shown in figure.

Discussion

18.	A uniform rod ABC of mass M is placed vertically on a rough horizontal surface. The coefficient of kinetic friction between the rod and the surface is μ. A force F(>μmg) is applied on the rod at point B at distance l/3 below centre of the rod as shown in figure. The initial acceleration of point A is
Answer» A uniform rod $A B C$ of mass $M$ is placed vertically on a rough horizontal surface. The coefficient of kinetic friction between the rod and the surface is $μ$ . A force $F (> μ m g)$ is applied on the rod at point $B$ at distance $l / 3$ below centre of the rod as shown in figure. The initial acceleration of point $A$ is

Discussion

19.	There is a circular tube in a vertical plane. Two liquids which do not mix and of densities d1 and d2 are filled in the tube. Each liquid subtends 90∘ angle at centre. Radius joining their interface makes an angle α with vertical. Ratio d1d2 is:
Answer» There is a circular tube in a vertical plane. Two liquids which do not mix and of densities $d_{1}$ and $d_{2}$ are filled in the tube. Each liquid subtends $90^{\circ}$ angle at centre. Radius joining their interface makes an angle $α$ with vertical. Ratio $\frac{d_{1}}{d_{2}}$ is:

Discussion

20.	A coin is placed at the edge of a horizontal disc rotating about a vertical axis throught its axis with a uniform angular speed 2 rad/s. The radius of the disc is 50 cm. Find the minimum coefficient of friction between disc and coin so that the coin does not slip (g=10 ms−2)
Answer» A coin is placed at the edge of a horizontal disc rotating about a vertical axis throught its axis with a uniform angular speed $2 rad/s$ . The radius of the disc is $50 cm$ . Find the minimum coefficient of friction between disc and coin so that the coin does not slip $(g = 10 {ms}^{- 2})$

Discussion

21.	Why player pull his hand back while catching ball in cricket
Answer» Why player pull his hand back while catching ball in cricket

Discussion

22.	In an interference arrangement similar to Young's double slit experiment, the slits S1 and S2 are illuminated with coherent microwave sources each of frequency 106 Hz. The sources are synchronized to have zero phase difference. The slits are separated by distance d = 150 m. The intensity I(θ)is measured as a function of q, where q is defined as shown. If I0 is maximum intensity, then I(θ) for 0≤θ≤90° is given by
Answer» In an interference arrangement similar to Young's double slit experiment, the slits S₁ and S₂ are illuminated with coherent microwave sources each of frequency 10⁶ Hz. The sources are synchronized to have zero phase difference. The slits are separated by distance d = 150 m. The intensity I(θ)is measured as a function of q, where q is defined as shown. If I₀ is maximum intensity, then I(θ) for 0≤θ≤90° is given by

22.

In an interference arrangement similar to Young's double slit experiment, the slits S1 and S2 are illuminated with coherent microwave sources each of frequency 106 Hz. The sources are synchronized to have zero phase difference. The slits are separated by distance d = 150 m. The intensity I(θ)is measured as a function of q, where q is defined as shown. If I0 is maximum intensity, then I(θ) for 0≤θ≤90° is given by

Answer»

In an interference arrangement similar to Young's double slit experiment, the slits S₁ and S₂ are illuminated with coherent microwave sources each of frequency 10⁶ Hz. The sources are synchronized to have zero phase difference. The slits are separated by distance d = 150 m. The intensity I(θ)is measured as a function of q, where q is defined as shown. If I₀ is maximum intensity, then I(θ) for 0≤θ≤90° is given by

Discussion

23.	Why we don't draw electric field lines through conductors?
Answer» Why we don't draw electric field lines through conductors?

Discussion

24.	What is the definition of dimension ? What is dimension?
Answer» What is the definition of dimension ? What is dimension?

24.

What is the definition of dimension ? What is dimension?

Answer»

What is the definition of dimension ?

What is dimension?

Discussion

25.	The angle made by the vector A=^i+^j with x- axis is
Answer» The angle made by the vector $A =^i +^j$ with x- axis is

Discussion

26.	A drop of water of mass m and density ρ is placed between two well cleaned glass plates the distance between which is d. What is the force of attraction between the plates? T= surface tension
Answer» A drop of water of mass m and density ρ is placed between two well cleaned glass plates the distance between which is d. What is the force of attraction between the plates? T= surface tension

Discussion

27.	Two point A and B Lie on two extremes of a diameter AB as shown in figure. The sphere rotates with constant angular velocity ω about an axis as shown. What is the angular velocity of Q with respect to P?
Answer» Two point A and B Lie on two extremes of a diameter AB as shown in figure. The sphere rotates with constant angular velocity $ω$ about an axis as shown. What is the angular velocity of Q with respect to P?

27.

Two point A and B Lie on two extremes of a diameter AB as shown in figure. The sphere rotates with constant angular velocity ω about an axis as shown. What is the angular velocity of Q with respect to P?

Answer»

Two point A and B Lie on two extremes of a diameter AB as shown in figure. The sphere rotates with constant angular velocity $ω$ about an axis as shown. What is the angular velocity of Q with respect to P?

Discussion

28.	Two wires are fixed in a sonometer. Their tensions are in the ratio 8 : 1. The lengths are in the ratio 36 : 35. The diameters are in the ratio 4 : 1. Densities of the materials are in the ratio 1 : 2. If the lower frequency in the setting is 360 Hz. the beat frequency when the two wires are sounded together is
Answer» Two wires are fixed in a sonometer. Their tensions are in the ratio 8 : 1. The lengths are in the ratio 36 : 35. The diameters are in the ratio 4 : 1. Densities of the materials are in the ratio 1 : 2. If the lower frequency in the setting is 360 Hz. the beat frequency when the two wires are sounded together is

Discussion

29.	A highly rigid cubical block A of small mass M and side L is fixed rigidly onto another cubical block B of the same dimensions and of modulus of rigidity η such that the lower face of A completely covers the upper face of B. The lower face of B is rigidly held on a horizontal surface. A small force F is applied perpendicular to one of the side faces of A. After the force is withdrawn block A executes small oscillations. The time period of which is given by
Answer» A highly rigid cubical block $A$ of small mass $M$ and side $L$ is fixed rigidly onto another cubical block $B$ of the same dimensions and of modulus of rigidity $η$ such that the lower face of $A$ completely covers the upper face of $B$ . The lower face of $B$ is rigidly held on a horizontal surface. A small force $F$ is applied perpendicular to one of the side faces of $A$ . After the force is withdrawn block $A$ executes small oscillations. The time period of which is given by

Discussion

30.	Velocity of a car as a function of time is given by v(t)=(4t3−et+sint) in m/s. The acceleration in (m/s2) of the car as a function of time t is
Answer» Velocity of a car as a function of time is given by $v (t) = (4 t^{3} - e^{t} + sin t)$ in $m/s$ . The acceleration in $(m / s^{2})$ of the car as a function of time $t$ is

Discussion

31.	Three identical balls balls one ball two and ball 3 are placed on a smooth floor on a straight line at separation of 10 Meter between the balls as shown in the figure initially balls are at stationery ball 1 is given a velocity of 10 Meter per second towards ball 2 to collision between ball 1 and 2 is inelastic with coefficient of restitution 0.5 but collision between ball2 and 3 is perfectly elastic what is the time interval between two consecutive collisions between ball1 and 2
Answer» Three identical balls balls one ball two and ball 3 are placed on a smooth floor on a straight line at separation of 10 Meter between the balls as shown in the figure initially balls are at stationery ball 1 is given a velocity of 10 Meter per second towards ball 2 to collision between ball 1 and 2 is inelastic with coefficient of restitution 0.5 but collision between ball2 and 3 is perfectly elastic what is the time interval between two consecutive collisions between ball1 and 2

Discussion

32.	Two rods of different materials, having coefficients of linear expansion α1 and α2 and Young's moduli Y1 and Y2 respectively, are fixed between two rigid walls. The rods are heated to the same temperature. There is no bending of the rods. If α1:α2=2:3, the thermal stress developed in the two rods will be equal provided Y1:Y2 is equal to
Answer» Two rods of different materials, having coefficients of linear expansion $α_{1}$ and $α_{2}$ and Young's moduli $Y_{1}$ and $Y_{2}$ respectively, are fixed between two rigid walls. The rods are heated to the same temperature. There is no bending of the rods. If $α_{1} : α_{2} = 2 : 3$ , the thermal stress developed in the two rods will be equal provided $Y_{1} : Y_{2}$ is equal to

Discussion

33.	Is the pressure exerted by 2 N2 molecule equal to the pressure exerted by 4 N atoms at constt.temp and volume ?
Answer» Is the pressure exerted by 2 N2 molecule equal to the pressure exerted by 4 N atoms at constt.temp and volume ?

Discussion

34.	Which of the following quantity is represented by the following a )product of molecule moment of inertia and angular velocity b)product of moment of inertia of angular acceleration
Answer» Which of the following quantity is represented by the following a )product of molecule moment of inertia and angular velocity b)product of moment of inertia of angular acceleration

Discussion

35.	A wire has a non-uniform cross-sectional area as shown in figure. A steady current i flows through it. Which one of the following statement is correct
Answer» A wire has a non-uniform cross-sectional area as shown in figure. A steady current i flows through it. Which one of the following statement is correct

Discussion

36.	A cricketer hits a ball with a velocity 25 m/s at 60∘ above the horizontal. How far above the ground it passes over a fielder 50 m from the bat (assume the ball is struck very close to the ground)
Answer» A cricketer hits a ball with a velocity 25 m/s at $60^{\circ}$ above the horizontal. How far above the ground it passes over a fielder 50 m from the bat (assume the ball is struck very close to the ground)

Discussion

37.	Weight of a body of mass m decreases by 1% when it is raised to height h above the earth’s surface. If the body is taken to a depth h in a mine, change in its weight is
Answer» Weight of a body of mass m decreases by $1 %$ when it is raised to height h above the earth’s surface. If the body is taken to a depth h in a mine, change in its weight is

Discussion

38.	At constant volume, for different diatomic gases the molar specific heat is
Answer» At constant volume, for different diatomic gases the molar specific heat is

Discussion

39.	If specific heat of a substance is infinite, it means [AIIMS 1997]
Answer» If specific heat of a substance is infinite, it means [AIIMS 1997]

Discussion

40.	A light and a heavy body have equal kinetic energy. Which one has a greater momentum ?
Answer» A light and a heavy body have equal kinetic energy. Which one has a greater momentum ?

40.

A light and a heavy body have equal kinetic energy. Which one has a greater momentum ?

Answer»

A light and a heavy body have equal kinetic energy. Which one has a greater momentum ?

Discussion

41.	Energy (E) and frequency (v) of a photon is correctly represented by
Answer» Energy (E) and frequency (v) of a photon is correctly represented by

Discussion

42.	A steel wire of mass 4.0 g and length 80 cm is fixed at the two ends. The tension in the wire is 50 N. Find the frequency and wavelength of the fourth harmonic of the fundamental.
Answer» A steel wire of mass 4.0 g and length 80 cm is fixed at the two ends. The tension in the wire is 50 N. Find the frequency and wavelength of the fourth harmonic of the fundamental.

Discussion

43.	A particle is projected with velocity u at angle θ1 with horizontal. The ratio of range and maximum height is 4. When it is projected at angle θ2 with horizontal with same speed, the ratio of range and maximum height is 2. Then tanθ1tanθ2 will be equal to
Answer» A particle is projected with velocity $u$ at angle $θ_{1}$ with horizontal. The ratio of range and maximum height is $4$ . When it is projected at angle $θ_{2}$ with horizontal with same speed, the ratio of range and maximum height is $2$ . Then $\frac{tan θ_{1}}{tan θ_{2}}$ will be equal to

Discussion

44.	From a solid sphere of mass M and radius R, a cube of maximum possible volume is cut. Moment of inertia of the cube about an axis passing through its centre and perpendicular to one of its faces is
Answer» From a solid sphere of mass $M$ and radius $R$ , a cube of maximum possible volume is cut. Moment of inertia of the cube about an axis passing through its centre and perpendicular to one of its faces is

Discussion

45.	The angle between →A and resultant of (→A+→B) and −→B is
Answer» The angle between $\to A$ and resultant of $(\to A + \to B)$ and $- \to B$ is

Discussion

46.	The current generator Ig, shown in figure (38-E20), sends a constant current i through the circuit. The wire ab has a length l and mass m and can slide on the smooth, horizontal rails connected to Ig. The entire system lies in a vertical magnetic field B. Find the velocity of the wire as a function of time.
Answer» The current generator $I_{g}$ , shown in figure (38-E20), sends a constant current i through the circuit. The wire ab has a length l and mass m and can slide on the smooth, horizontal rails connected to $I_{g}$ . The entire system lies in a vertical magnetic field B. Find the velocity of the wire as a function of time.

46.

The current generator Ig, shown in figure (38-E20), sends a constant current i through the circuit. The wire ab has a length l and mass m and can slide on the smooth, horizontal rails connected to Ig. The entire system lies in a vertical magnetic field B. Find the velocity of the wire as a function of time.

Answer»

The current generator $I_{g}$ , shown in figure (38-E20), sends a constant current i through the circuit. The wire ab has a length l and mass m and can slide on the smooth, horizontal rails connected to $I_{g}$ . The entire system lies in a vertical magnetic field B. Find the velocity of the wire as a function of time.

Discussion

47.	The block shown in the figure is in equilibrium. Find acceleration of the block just after the string is cut.
Answer» The block shown in the figure is in equilibrium. Find acceleration of the block just after the string is cut.

47.

The block shown in the figure is in equilibrium. Find acceleration of the block just after the string is cut.

Answer»

The block shown in the figure is in equilibrium. Find acceleration of the block just after the string is cut.

Discussion

48.	A spherical ball of salt is dossolving in water in such a manner that the rate of decrease of the volume at any instant is propotional to the surface. Prove that the readius is decreasing at a constant rate.
Answer» A spherical ball of salt is dossolving in water in such a manner that the rate of decrease of the volume at any instant is propotional to the surface. Prove that the readius is decreasing at a constant rate.

Discussion

49.	Two waves, each having a frequency of 100 Hz and a wavelength of 2.0 cm, are travelling in the same direction on a string. What is the phase difference between the waves (a) if the second wave was produced 0.015 s later than the first one at the same place, what would be the resultant amplitude? [Given individual amplitudes = 2.0 mm]
Answer» Two waves, each having a frequency of 100 H $_{z}$ and a wavelength of 2.0 cm, are travelling in the same direction on a string. What is the phase difference between the waves (a) if the second wave was produced 0.015 s later than the first one at the same place, what would be the resultant amplitude? [Given individual amplitudes = 2.0 mm]

Discussion

50.	Find the thrust to exert a pressure of 50,000 pascals on an area of 0.05m2
Answer» Find the thrust to exert a pressure of 50,000 pascals on an area of $0.05 m^{2}$

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A sphere of radius 1.00 cm is placed in the path of a parallel beam of light of large aperture. The intensity of the light is 0.50 W cm−2. If the sphere completely absorbs the radiation falling on it, find the force exerted by the light beam on the sphere.

A circular disc of radius R is removed from a bigger circular disc of radius 2R such that their circumferences coincide. The centre of mass of the new disc is at a distance of αR from the centre of the bigger disc. The value of α is

Three charges each of +4μC are the corners B, C, D of a square ABCD of side 1m. The electric field at the centre ‘O’ of the square is

If mean square of x− component of the velocity of molecules is denoted by ω2, then R.M.S velocity of molecules will be

Find the increase in pressure required to decrease the volume of a water sample by 0.01%. Bulk modulus of water = 2.1×109Nm−2

Consider the situation shown in figure. Initially the spring is unstretched when the system is released from rest. Assuming no friction in the pulley, find the maximum elongation of the spring?

A cylindrical vessel partially filled with water is rotated about its vertical central axis. It’s surface will

A particle is moving in a circle of radius r=2 m. Its speed with time varies according to the relation v(t)=4−6t2. What is the magnitude of the total acceleration of the particle at t=2 sec ? Use the value of √769=27.73 for calculation.

A bob of mass M is suspended through a massless string of length L. The horizontal velocity at position A is sufficient enough to make it reach at point B. The angle at which the speed of bob is half of that at A, satisfies

Energy of a photon E = hv and momentum of a photon p=hλ , then velocity of the photon is

Four harmonic waves of equal frequencies and equal intensities I0 have phase angles 0,π3,2π3 and π. When they are superposed, the intensity of the resulting wave is nI0. The value of n is ___

The masses of three wires of copper are in the ratio of 1:3:5 and their lengths are in the ratio 5:3:1. The ratio of their electrical resistance is :

A non conducting disc of radius R is rotating about an axis passing through its centre and perpendicular to its plane with an angular velocity ω. Charge q is uniformly distributed over its surface. The magnetic moment of the disc is

In a A.C. circuit, V and I are given by V = 100sin (100t) volt, I = 100 sin (100t+π3) A then the power dissipated in the circuit is

The potential energy of particle following S.H.M at mean position is 6 Joules and kinetic energy of particle at X=A√2 is 8 Joules, find energy of oscillation.

Two long wires AB and CD carry currents i1 and i2 in the direction shown in figure.

There is a circular tube in a vertical plane. Two liquids which do not mix and of densities d1 and d2 are filled in the tube. Each liquid subtends 90∘ angle at centre. Radius joining their interface makes an angle α with vertical. Ratio d1d2 is:

A coin is placed at the edge of a horizontal disc rotating about a vertical axis throught its axis with a uniform angular speed 2 rad/s. The radius of the disc is 50 cm. Find the minimum coefficient of friction between disc and coin so that the coin does not slip (g=10 ms−2)

Why player pull his hand back while catching ball in cricket

Why we don't draw electric field lines through conductors?

What is the definition of dimension ? What is dimension?

The angle made by the vector A=^i+^j with x- axis is

A drop of water of mass m and density ρ is placed between two well cleaned glass plates the distance between which is d. What is the force of attraction between the plates? T= surface tension

Two point A and B Lie on two extremes of a diameter AB as shown in figure. The sphere rotates with constant angular velocity ω about an axis as shown. What is the angular velocity of Q with respect to P?

Velocity of a car as a function of time is given by v(t)=(4t3−et+sint) in m/s. The acceleration in (m/s2) of the car as a function of time t is

Is the pressure exerted by 2 N2 molecule equal to the pressure exerted by 4 N atoms at constt.temp and volume ?

Which of the following quantity is represented by the following a )product of molecule moment of inertia and angular velocity b)product of moment of inertia of angular acceleration

A wire has a non-uniform cross-sectional area as shown in figure. A steady current i flows through it. Which one of the following statement is correct

A cricketer hits a ball with a velocity 25 m/s at 60∘ above the horizontal. How far above the ground it passes over a fielder 50 m from the bat (assume the ball is struck very close to the ground)

Weight of a body of mass m decreases by 1% when it is raised to height h above the earth’s surface. If the body is taken to a depth h in a mine, change in its weight is

At constant volume, for different diatomic gases the molar specific heat is

If specific heat of a substance is infinite, it means [AIIMS 1997]

A light and a heavy body have equal kinetic energy. Which one has a greater momentum ?

Energy (E) and frequency (v) of a photon is correctly represented by

A steel wire of mass 4.0 g and length 80 cm is fixed at the two ends. The tension in the wire is 50 N. Find the frequency and wavelength of the fourth harmonic of the fundamental.

A particle is projected with velocity u at angle θ1 with horizontal. The ratio of range and maximum height is 4. When it is projected at angle θ2 with horizontal with same speed, the ratio of range and maximum height is 2. Then tanθ1tanθ2 will be equal to

From a solid sphere of mass M and radius R, a cube of maximum possible volume is cut. Moment of inertia of the cube about an axis passing through its centre and perpendicular to one of its faces is

The angle between →A and resultant of (→A+→B) and −→B is

The block shown in the figure is in equilibrium. Find acceleration of the block just after the string is cut.

A spherical ball of salt is dossolving in water in such a manner that the rate of decrease of the volume at any instant is propotional to the surface. Prove that the readius is decreasing at a constant rate.

Find the thrust to exert a pressure of 50,000 pascals on an area of 0.05m2