50278 + Interview Questions in Physics

1.	Unit vector of →A is equal to
Answer» Unit vector of $\to A$ is equal to

Discussion

2.	A body of mass 2 kg is moving uniformly with the velocity of 2^i+3^j+4^k. Find its kinetic energy.
Answer» A body of mass $2 kg$ is moving uniformly with the velocity of $2^i + 3^j + 4^k$ . Find its kinetic energy.

Discussion

3.	A particle has initial velocity (2^i+3^j) and acceleration (0.3^i+0.2^j). The magnitude of velocity after 10 s will be
Answer» A particle has initial velocity $(2^i + 3^j)$ and acceleration $(0.3^i + 0.2^j)$ . The magnitude of velocity after $10 s$ will be

Discussion

4.	What is difference between Uniform Acceleration and Uniform Velocity?
Answer» What is difference between Uniform Acceleration and Uniform Velocity?

Discussion

5.	How to solve this question ,I have calculated equivalent capacitance as 4 and after that when I solved for charges ,I had got different answer .Please help me with the solution.
Answer» How to solve this question ,I have calculated equivalent capacitance as 4 and after that when I solved for charges ,I had got different answer .Please help me with the solution.

Discussion

6.	The molar heat capacity of 1 mole of a diatomic gas, if it does a work of Q/4 in a process when heat Q is supplied to it, is -
Answer» The molar heat capacity of 1 mole of a diatomic gas, if it does a work of $Q / 4$ in a process when heat $Q$ is supplied to it, is -

Discussion

7.	Two spherical black bodies A and B, having radii rA and rB, where rB=2rA emit radiation with peak intensities at wavelength 400 nm and 800 nm respectively. If their temperatures are TA and TB respectively in Kelvin scale, their emissive powers are EA and EB and energies emitted per second are PA and PB respectively, then
Answer» Two spherical black bodies $A$ and $B$ , having radii $r_{A}$ and $r_{B},$ where $r_{B} = 2 r_{A}$ emit radiation with peak intensities at wavelength $400 nm$ and $800 nm$ respectively. If their temperatures are $T_{A}$ and $T_{B}$ respectively in Kelvin scale, their emissive powers are $E_{A}$ and $E_{B}$ and energies emitted per second are $P_{A}$ and $P_{B}$ respectively, then

Discussion

8.	A charge q is located above the centre of a square plate of side a, at a distance a2. The flux of electric field through the plate Is?
Answer» A charge q is located above the centre of a square plate of side a, at a distance $\frac{a}{2}$ . The flux of electric field through the plate Is?

Discussion

9.	with what speed should a body be thrown up so that the distance traversed in the 5th and 6th second is the same?
Answer» with what speed should a body be thrown up so that the distance traversed in the 5th and 6th second is the same?

Discussion

10.	A body travelling along a straight line transversed one third of the total distance with a velocity 4 m/s . The remaining part of the distance was covered with a velocity 2 m/s for half time and with velocity 6 m/s for the other half of time . The mean velocity averaged over the whole time of motion is
Answer» A body travelling along a straight line transversed one third of the total distance with a velocity 4 m/s . The remaining part of the distance was covered with a velocity 2 m/s for half time and with velocity 6 m/s for the other half of time . The mean velocity averaged over the whole time of motion is

Discussion

11.	Air is pumped into an automobile tyre's tube up to a pressure of 200 kPa in the morning when the air temperature is 200C. During the day the temperature rises to 400C and the tube expands by 2%. Calculate the pressure of the air in the tube at this temperature
Answer» Air is pumped into an automobile tyre's tube up to a pressure of 200 kPa in the morning when the air temperature is 200C. During the day the temperature rises to 400C and the tube expands by 2%. Calculate the pressure of the air in the tube at this temperature

Discussion

12.	A body of mass 2 kg is being dragged with a uniform velocity of 2 m/s on a rough horizontal plane. The co-efficient of friction between the body and the surface is 0.20, 4.2 J = 1 Calorie and g=9.8 m/s2. The amount of heat generated in 5 seconds is
Answer» A body of mass 2 kg is being dragged with a uniform velocity of 2 m/s on a rough horizontal plane. The co-efficient of friction between the body and the surface is 0.20, 4.2 J = 1 Calorie and $g = 9.8 m / s^{2}$ . The amount of heat generated in 5 seconds is

Discussion

13.	A block is attached to a spring having equilibrium position at x=0. The block oscillates between x=−4 m and x=4 m. Find the change in potential energy stored in the spring when the block moves from x=2 to x=−3. Given the spring constant is 5 N/m.
Answer» A block is attached to a spring having equilibrium position at $x = 0$ . The block oscillates between $x = - 4 m$ and $x = 4 m$ . Find the change in potential energy stored in the spring when the block moves from $x = 2$ to $x = - 3$ . Given the spring constant is $5 N/m$ .

Discussion

14.	Calculate the work done when 1 mole of water at 373k vaporizes against 1 atmosphere. Assume ideal gas behavior.
Answer» Calculate the work done when 1 mole of water at 373k vaporizes against 1 atmosphere. Assume ideal gas behavior.

Discussion

15.	A Lloyd’s mirror of length 5 cm is illuminated with monochromatic light of wavelength λ(=6000∘A) from a narrow 1 mm slit in its plane and 5 cm plane from its near edge. Find the fringe width on a screen 120 cm from the slit and width of interference pattern on the screen.
Answer» A Lloyd’s mirror of length 5 cm is illuminated with monochromatic light of wavelength $λ (= 6000 \circ A)$ from a narrow 1 mm slit in its plane and $5 cm$ plane from its near edge. Find the fringe width on a screen $120 cm$ from the slit and width of interference pattern on the screen.

Discussion

16.	A source of sound placed at the open end of a resonance column sends an acoustic wave of pressure amplitude PA inside the tube. If the atmospheric pressure is P0 then the ratio of maximum and minimum pressure at the closed end of the tube will be
Answer» A source of sound placed at the open end of a resonance column sends an acoustic wave of pressure amplitude $P_{A}$ inside the tube. If the atmospheric pressure is $P_{0}$ then the ratio of maximum and minimum pressure at the closed end of the tube will be

Discussion

17.	A shell is fired vertically up. At some point it explodes in three parts with mass ratio 1:1:2 . One part falls at 10m left of projected point. Heavier part falls at 20 m right. What is the position of the third part?
Answer» A shell is fired vertically up. At some point it explodes in three parts with mass ratio 1:1:2 . One part falls at 10m left of projected point. Heavier part falls at 20 m right. What is the position of the third part?

17.

A shell is fired vertically up. At some point it explodes in three parts with mass ratio 1:1:2 . One part falls at 10m left of projected point. Heavier part falls at 20 m right. What is the position of the third part?

Answer»

A shell is fired vertically up. At some point it explodes in three parts with mass ratio 1:1:2 . One part falls at 10m left of projected point. Heavier part falls at 20 m right. What is the position of the third part?

Discussion

18.	A rope of negligible mass is wound round a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force of 30 N? What is the linear acceleration of the rope?
Answer» A rope of negligible mass is wound round a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force of 30 N? What is the linear acceleration of the rope?

Discussion

19.	The position of a particle moving along x-axis is given by x=(5t2−4t+20) m, where t is in second. Find the magnitude average velocity between 1 s and 3 s.
Answer» The position of a particle moving along x-axis is given by $x = (5 t^{2} - 4 t + 20) m$ , where $t$ is in second. Find the magnitude average velocity between $1 s$ and $3 s$ .

Discussion

20.	An equilateral uniform prism of mass m rests on a rough horizontal surface with coefficient of friction μ and a horizontal force F is applied. If the coefficient of friction is sufficiently high so that the prism does not slide before toppling, then the minimum force required to topple the prism is:
Answer» An equilateral uniform prism of mass $m$ rests on a rough horizontal surface with coefficient of friction $μ$ and a horizontal force $F$ is applied. If the coefficient of friction is sufficiently high so that the prism does not slide before toppling, then the minimum force required to topple the prism is:

Discussion

21.	What will be the change in the following energies i) Kinetic ii) Potential iii) Mechanical, if a body enters into earth atmosphere from infinity.
Answer» What will be the change in the following energies i) Kinetic ii) Potential iii) Mechanical, if a body enters into earth atmosphere from infinity.

Discussion

22.	A particle retards from a velocity v0 while moving in a straight line. If the magnitude of deceleration is directly proportional to the square root of the speed of the particle, find its average velocity for the total time of its motion.
Answer» A particle retards from a velocity $v_{0}$ while moving in a straight line. If the magnitude of deceleration is directly proportional to the square root of the speed of the particle, find its average velocity for the total time of its motion.

Discussion

23.	A uniform sphere is rotating with constant angular velocity 'ω' about one of its diameter OOI which is perpendicular to the line joining A and B. Points A and B are at a separation of R3 and R2 from the origin of the solid. Choose the correct statement:-
Answer» A uniform sphere is rotating with constant angular velocity ' $ω$ ' about one of its diameter OO^Iwhich is perpendicular to the line joining A and B. Points A and B are at a separation of $\frac{R}{3}$ and $\frac{R}{2}$ from the origin of the solid. Choose the correct statement:-

Discussion

24.	If the range of the function f(x)=tan−1(3x2+bx+d) is [0,π2) then
Answer» If the range of the function $f (x) = t a n^{- 1} (3 x^{2} + b x + d)$ is $[0, \frac{π}{2})$ then

Discussion

25.	Two passenger trains moving with a speed of 108 km/hour cross each other. One of them blows a whistle whose frequency is 750 Hz. If sound speed is 330 m/s, then passengers sitting in the other train, after trains cross each other will hear sound whose frequency will be
Answer» Two passenger trains moving with a speed of 108 km/hour cross each other. One of them blows a whistle whose frequency is 750 Hz. If sound speed is 330 m/s, then passengers sitting in the other train, after trains cross each other will hear sound whose frequency will be

25.

Two passenger trains moving with a speed of 108 km/hour cross each other. One of them blows a whistle whose frequency is 750 Hz. If sound speed is 330 m/s, then passengers sitting in the other train, after trains cross each other will hear sound whose frequency will be

Answer»

Two passenger trains moving with a speed of 108 km/hour cross each other.

One of them blows a whistle whose frequency is 750 Hz. If sound speed is

330 m/s, then passengers sitting in the other train, after trains cross each

other will hear sound whose frequency will be

Discussion

26.	If a simple harmonic oscillator has got a displacement of 0.02 m and acceleration equal to 2.0ms−1 at any time, the angular frequency of the oscillator is equal to
Answer» If a simple harmonic oscillator has got a displacement of 0.02 m and acceleration equal to 2.0 $m s^{- 1}$ at any time, the angular frequency of the oscillator is equal to

26.

If a simple harmonic oscillator has got a displacement of 0.02 m and acceleration equal to 2.0ms−1 at any time, the angular frequency of the oscillator is equal to

Answer»

If a simple harmonic oscillator has got a displacement of 0.02 m and acceleration equal to 2.0 $m s^{- 1}$ at any time, the angular frequency of the oscillator is equal to

Discussion

27.	How does magnetic force only affect direction of velocity and not kinetic energy? As kinetic energy = 1/2 MVsquare and depends on velocity.
Answer» How does magnetic force only affect direction of velocity and not kinetic energy? As kinetic energy = 1/2 MVsquare and depends on velocity.

Discussion

28.	How to prove mathematically that for any random conductor charge is directly proportional to potential
Answer» How to prove mathematically that for any random conductor charge is directly proportional to potential

Discussion

29.	Heater can boil some amt of h20 in 15 mins in order to boil same amt of h20 in 10 mins from same supply . What chnge in length of coil should be done
Answer» Heater can boil some amt of h20 in 15 mins in order to boil same amt of h20 in 10 mins from same supply . What chnge in length of coil should be done

Discussion

30.	If in a plano-convex lens radius of curvature of convex surface is 10 cm and the focal length of the lens is 30 cm, the refractive index of the material of the lens will be:
Answer» If in a plano-convex lens radius of curvature of convex surface is 10 cm and the focal length of the lens is 30 cm, the refractive index of the material of the lens will be:

Discussion

31.	what is the another name of angular momentum
Answer» what is the another name of angular momentum

Discussion

32.	12 equal charges q are situated at the corners of a regular 12 sided polygon . What is the net force on the test charge Q at the centre?
Answer» 12 equal charges q are situated at the corners of a regular 12 sided polygon . What is the net force on the test charge Q at the centre?

Discussion

33.	The distance of Venus from the sun is 0.72astronomic unit. Find the orbital period of Venus
Answer» The distance of Venus from the sun is 0.72astronomic unit. Find the orbital period of Venus

Discussion

34.	A rigid ball of mass m strikes a rigid wall at 60∘ and gets reflected without loss of speed as shown in the figure. The value of impulse imparted by the wall on the ball will be
Answer» A rigid ball of mass $m$ strikes a rigid wall at $60^{\circ}$ and gets reflected without loss of speed as shown in the figure. The value of impulse imparted by the wall on the ball will be

Discussion

35.	A boat of area 10 m2 floating on the surface of a river is made to move horizontally with a speed of 2 m/s by applying a tangential force. If the river is 1 m deep and the water in contact with the bed is stationary, find the tangential force needed to keep the boat moving with same velocity. (Assume the viscosity of water as 0.01 poise).
Answer» A boat of area $10 m^{2}$ floating on the surface of a river is made to move horizontally with a speed of $2 m/s$ by applying a tangential force. If the river is $1 m$ deep and the water in contact with the bed is stationary, find the tangential force needed to keep the boat moving with same velocity. (Assume the viscosity of water as $0.01 poise$ ).

Discussion

36.	Two masses of 1 gm and 4 gm are moving with equal kinetic energies. The ratio of the magnitudes of their linear moment is
Answer» Two masses of 1 gm and 4 gm are moving with equal kinetic energies. The ratio of the magnitudes of their linear moment is

36.

Two masses of 1 gm and 4 gm are moving with equal kinetic energies. The ratio of the magnitudes of their linear moment is

Answer»

Two masses of 1 gm and 4 gm are moving with equal kinetic energies. The ratio of the magnitudes of their linear moment is

Discussion

37.	Explain the contribution of James clerk maxwell in unification of different forces and domain
Answer» Explain the contribution of James clerk maxwell in unification of different forces and domain

Discussion

38.	The ejection of a photoelectron from a metal in the photoelectric effect experiment can by stopped by applying 0.35 eV when a radiation of 256.7 nm is used. The work function of the metal is:
Answer» The ejection of a photoelectron from a metal in the photoelectric effect experiment can by stopped by applying $0.35 eV$ when a radiation of $256.7 nm$ is used. The work function of the metal is:

Discussion

39.	A particle is projected such that the horizontal range and vertical height are the same. What is the angle of projection?
Answer» A particle is projected such that the horizontal range and vertical height are the same. What is the angle of projection?

Discussion

40.	In an AC circuit the applied potential difference and the current flowing are given by: V = 200 sin 100 t volt, I = 5 sin [100t+π2]amp The average power consumed in the circuit is
Answer» In an AC circuit the applied potential difference and the current flowing are given by: V = 200 sin 100 t volt, I = 5 sin $[100 t + \frac{π}{2}] a m p$ The average power consumed in the circuit is

Discussion

41.	A body executing simple harmonic motion has a maximum acceleration equal to 24 metres/sec2 and maximum velocity equal to 16 meters/sec. The amplitude of the simple harmonic motion is [MP PMT 1995; DPMT 2002; RPET 2003; Pb. PET 2004]
Answer» A body executing simple harmonic motion has a maximum acceleration equal to 24 metres/ $s e c^{2}$ and maximum velocity equal to 16 meters/sec. The amplitude of the simple harmonic motion is [MP PMT 1995; DPMT 2002; RPET 2003; Pb. PET 2004]

41.

A body executing simple harmonic motion has a maximum acceleration equal to 24 metres/sec2 and maximum velocity equal to 16 meters/sec. The amplitude of the simple harmonic motion is [MP PMT 1995; DPMT 2002; RPET 2003; Pb. PET 2004]

Answer»

A body executing simple harmonic motion has a maximum acceleration equal to 24 metres/ $s e c^{2}$ and maximum velocity equal to 16 meters/sec. The amplitude of the simple harmonic motion is

[MP PMT 1995; DPMT 2002; RPET 2003; Pb. PET 2004]

Discussion

42.	An airplane moving horizontally with a speed of 720 km/h drops a food pocket while flying at a height of 396.9 m. The time taken by a food pocket to reach the ground and its horizontal range is (Take g = 9.8 m/sec2)
Answer» An airplane moving horizontally with a speed of 720 km/h drops a food pocket while flying at a height of 396.9 m. The time taken by a food pocket to reach the ground and its horizontal range is (Take g = 9.8 m/ $s e c^{2}$ )

Discussion

43.	Each capacitor in figure (31-E21) ha a capacitance of 10 μF. The emf of the battery is 100 V. Find the energy stored in each of the four capacitors.
Answer» Each capacitor in figure (31-E21) ha a capacitance of $10 μ F .$ The emf of the battery is 100 V. Find the energy stored in each of the four capacitors.

Discussion

44.	A rod of mass m and length l is lying along the y-axis such that its end is at the origin. Suddenly an impulse is given to the rod such that immediately after the impulse, the end on the origin has a velocity v0^i and the other end has a velocity 2vo^i. The magnitude of angular momentum of the rod about the origin at this instant is 5nmv0l. Find n.
Answer» A rod of mass $m$ and length $l$ is lying along the y-axis such that its end is at the origin. Suddenly an impulse is given to the rod such that immediately after the impulse, the end on the origin has a velocity $v_{0}^i$ and the other end has a velocity $2 v_{o}^i$ . The magnitude of angular momentum of the rod about the origin at this instant is $\frac{5}{n} m v_{0} l$ . Find n.

Discussion

45.	The diameter of the moon is 3.5×103km and its distance from the earth is 3.8×105km. If it is seen through a telescope whose focal length for objective and eye lens are 4 m and 10 cm respectively, then the angle subtended by the image of the moon on the eye will be approximately
Answer» The diameter of the moon is $3.5 \times 10^{3} k m$ and its distance from the earth is $3.8 \times 10^{5} k m$ . If it is seen through a telescope whose focal length for objective and eye lens are 4 m and 10 cm respectively, then the angle subtended by the image of the moon on the eye will be approximately

Discussion

46.	Absolute temperature can be calculated by
Answer» Absolute temperature can be calculated by

46.

Absolute temperature can be calculated by

Answer»

Absolute temperature can be calculated by

Discussion

47.	If a particle moves in a circle describing equal angles in equal intervals of time, its velocity vector
Answer» If a particle moves in a circle describing equal angles in equal intervals of time, its velocity vector

Discussion

48.	Three equal weights A, B and C of mass 2 kg each are hanging on a string passing over a fixed frictionless pulley as shown in the figure The tension in the string connecting weights B and C is
Answer» Three equal weights A, B and C of mass 2 kg each are hanging on a string passing over a fixed frictionless pulley as shown in the figure The tension in the string connecting weights B and C is

48.

Three equal weights A, B and C of mass 2 kg each are hanging on a string passing over a fixed frictionless pulley as shown in the figure The tension in the string connecting weights B and C is

Answer»

Three equal weights A, B and C of mass 2 kg each are hanging on a string passing over a fixed frictionless pulley as shown in the figure The tension in the string connecting weights B and C is

Discussion

49.	A block is at rest on an inclined plane making an angle αwith the horizontal. As the angle αof the incline is increased, the block starts slipping when the angle of inclination becomes θ. The coefficient of static friction between the block and the surface of the inclined plane is or A body starts sliding down at an angle θto horizontal. Then coefficient of friction is equal to
Answer» A block is at rest on an inclined plane making an angle αwith the horizontal. As the angle αof the incline is increased, the block starts slipping when the angle of inclination becomes θ. The coefficient of static friction between the block and the surface of the inclined plane is or A body starts sliding down at an angle θto horizontal. Then coefficient of friction is equal to

Discussion

50.	If W1, W2 and W3 represents the work done in moving a particle from A to B along three different paths 1, 2 and 3, respectively (as shown) in the gravitational field of a point mass m, find the correct relation between W1, W2 and W3.
Answer» If W1, W2 and W3 represents the work done in moving a particle from A to B along three different paths 1, 2 and 3, respectively (as shown) in the gravitational field of a point mass m, find the correct relation between W1, W2 and W3.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Unit vector of →A is equal to

A body of mass 2 kg is moving uniformly with the velocity of 2^i+3^j+4^k. Find its kinetic energy.

A particle has initial velocity (2^i+3^j) and acceleration (0.3^i+0.2^j). The magnitude of velocity after 10 s will be

What is difference between Uniform Acceleration and Uniform Velocity?

How to solve this question ,I have calculated equivalent capacitance as 4 and after that when I solved for charges ,I had got different answer .Please help me with the solution.

The molar heat capacity of 1 mole of a diatomic gas, if it does a work of Q/4 in a process when heat Q is supplied to it, is -

A charge q is located above the centre of a square plate of side a, at a distance a2. The flux of electric field through the plate Is?

with what speed should a body be thrown up so that the distance traversed in the 5th and 6th second is the same?

Air is pumped into an automobile tyre's tube up to a pressure of 200 kPa in the morning when the air temperature is 200C. During the day the temperature rises to 400C and the tube expands by 2%. Calculate the pressure of the air in the tube at this temperature

A body of mass 2 kg is being dragged with a uniform velocity of 2 m/s on a rough horizontal plane. The co-efficient of friction between the body and the surface is 0.20, 4.2 J = 1 Calorie and g=9.8 m/s2. The amount of heat generated in 5 seconds is

A block is attached to a spring having equilibrium position at x=0. The block oscillates between x=−4 m and x=4 m. Find the change in potential energy stored in the spring when the block moves from x=2 to x=−3. Given the spring constant is 5 N/m.

Calculate the work done when 1 mole of water at 373k vaporizes against 1 atmosphere. Assume ideal gas behavior.

A Lloyd’s mirror of length 5 cm is illuminated with monochromatic light of wavelength λ(=6000∘A) from a narrow 1 mm slit in its plane and 5 cm plane from its near edge. Find the fringe width on a screen 120 cm from the slit and width of interference pattern on the screen.

A source of sound placed at the open end of a resonance column sends an acoustic wave of pressure amplitude PA inside the tube. If the atmospheric pressure is P0 then the ratio of maximum and minimum pressure at the closed end of the tube will be

A shell is fired vertically up. At some point it explodes in three parts with mass ratio 1:1:2 . One part falls at 10m left of projected point. Heavier part falls at 20 m right. What is the position of the third part?

A rope of negligible mass is wound round a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force of 30 N? What is the linear acceleration of the rope?

The position of a particle moving along x-axis is given by x=(5t2−4t+20) m, where t is in second. Find the magnitude average velocity between 1 s and 3 s.

What will be the change in the following energies i) Kinetic ii) Potential iii) Mechanical, if a body enters into earth atmosphere from infinity.

A particle retards from a velocity v0 while moving in a straight line. If the magnitude of deceleration is directly proportional to the square root of the speed of the particle, find its average velocity for the total time of its motion.

A uniform sphere is rotating with constant angular velocity 'ω' about one of its diameter OOI which is perpendicular to the line joining A and B. Points A and B are at a separation of R3 and R2 from the origin of the solid. Choose the correct statement:-

If the range of the function f(x)=tan−1(3x2+bx+d) is [0,π2) then

Two passenger trains moving with a speed of 108 km/hour cross each other. One of them blows a whistle whose frequency is 750 Hz. If sound speed is 330 m/s, then passengers sitting in the other train, after trains cross each other will hear sound whose frequency will be

If a simple harmonic oscillator has got a displacement of 0.02 m and acceleration equal to 2.0ms−1 at any time, the angular frequency of the oscillator is equal to

How does magnetic force only affect direction of velocity and not kinetic energy? As kinetic energy = 1/2 MVsquare and depends on velocity.

How to prove mathematically that for any random conductor charge is directly proportional to potential

Heater can boil some amt of h20 in 15 mins in order to boil same amt of h20 in 10 mins from same supply . What chnge in length of coil should be done

If in a plano-convex lens radius of curvature of convex surface is 10 cm and the focal length of the lens is 30 cm, the refractive index of the material of the lens will be:

what is the another name of angular momentum

12 equal charges q are situated at the corners of a regular 12 sided polygon . What is the net force on the test charge Q at the centre?

The distance of Venus from the sun is 0.72astronomic unit. Find the orbital period of Venus

A rigid ball of mass m strikes a rigid wall at 60∘ and gets reflected without loss of speed as shown in the figure. The value of impulse imparted by the wall on the ball will be

Two masses of 1 gm and 4 gm are moving with equal kinetic energies. The ratio of the magnitudes of their linear moment is

Explain the contribution of James clerk maxwell in unification of different forces and domain

The ejection of a photoelectron from a metal in the photoelectric effect experiment can by stopped by applying 0.35 eV when a radiation of 256.7 nm is used. The work function of the metal is:

A particle is projected such that the horizontal range and vertical height are the same. What is the angle of projection?

In an AC circuit the applied potential difference and the current flowing are given by: V = 200 sin 100 t volt, I = 5 sin [100t+π2]amp The average power consumed in the circuit is

A body executing simple harmonic motion has a maximum acceleration equal to 24 metres/sec2 and maximum velocity equal to 16 meters/sec. The amplitude of the simple harmonic motion is [MP PMT 1995; DPMT 2002; RPET 2003; Pb. PET 2004]

An airplane moving horizontally with a speed of 720 km/h drops a food pocket while flying at a height of 396.9 m. The time taken by a food pocket to reach the ground and its horizontal range is (Take g = 9.8 m/sec2)

Each capacitor in figure (31-E21) ha a capacitance of 10 μF. The emf of the battery is 100 V. Find the energy stored in each of the four capacitors.

The diameter of the moon is 3.5×103km and its distance from the earth is 3.8×105km. If it is seen through a telescope whose focal length for objective and eye lens are 4 m and 10 cm respectively, then the angle subtended by the image of the moon on the eye will be approximately

Absolute temperature can be calculated by

If a particle moves in a circle describing equal angles in equal intervals of time, its velocity vector

Three equal weights A, B and C of mass 2 kg each are hanging on a string passing over a fixed frictionless pulley as shown in the figure The tension in the string connecting weights B and C is

If W1, W2 and W3 represents the work done in moving a particle from A to B along three different paths 1, 2 and 3, respectively (as shown) in the gravitational field of a point mass m, find the correct relation between W1, W2 and W3.