50278 + Interview Questions in Physics

1.	A capillary tube of radius of cross section r is immersed in water and water rises in it to a height h. The mass of the water in the capillary is m. Another capillary is also immersed in water. The mass of water that rises in this capillary is m2. The radius of cross section of this capillary is
Answer» A capillary tube of radius of cross section r is immersed in water and water rises in it to a height h. The mass of the water in the capillary is m. Another capillary is also immersed in water. The mass of water that rises in this capillary is $\frac{m}{2}$ . The radius of cross section of this capillary is

Discussion

2.	Two similar coils of radius R are lying concentrically with their planes at right angles to each other, if the current through them are 2I and 4I respectively, then net magnetic induction at the centre is
Answer» Two similar coils of radius $R$ are lying concentrically with their planes at right angles to each other, if the current through them are $2 I$ and $4 I$ respectively, then net magnetic induction at the centre is

Discussion

3.	The mass of a bucket containing water is 10 kg. What is the work done in pulling up the bucket from a well of depth 10 m if water is pouring out at a uniform rate from a hole in it and there is loss of 2kg of water from it while it reaches the top (g=10m/sec2)
Answer» The mass of a bucket containing water is 10 kg. What is the work done in pulling up the bucket from a well of depth 10 m if water is pouring out at a uniform rate from a hole in it and there is loss of 2kg of water from it while it reaches the top $(g = 10 m / s e c^{2})$

Discussion

4.	River is flowing at 3 Km/h in the west direction and You can swim at a maximum speed of 5 Km/h , Given if the river is 12 km wide, How long will you take to cross the river?
Answer» River is flowing at 3 Km/h in the west direction and You can swim at a maximum speed of 5 Km/h , Given if the river is 12 km wide, How long will you take to cross the river?

Discussion

5.	A force →F=3^i+c^j+2^k acting on a particle causes a displacement →S=−4^i+2^j−3^k in its own direction. If the work done by the force is 6 J, then the value of c will be
Answer» A force $\to F = 3^i + c^j + 2^k$ acting on a particle causes a displacement $\to S = - 4^i + 2^j - 3^k$ in its own direction. If the work done by the force is $6 J$ , then the value of $c$ will be

Discussion

6.	Consider the network shown in the figure. The current in 2Ω resistor is 6A. Then power delivered in 12Ω resistor is (4n) W .find n. ___
Answer» Consider the network shown in the figure. The current in $2 Ω$ resistor is 6A. Then power delivered in $12 Ω$ resistor is (4n) W .find n. ___

Discussion

7.	A bar magnet, of magnetic moment M, is placed in a magnetic field of induction B. The torque exerted on it is
Answer» A bar magnet, of magnetic moment M, is placed in a magnetic field of induction B. The torque exerted on it is

Discussion

8.	A vertical glass tube, closed at the bottom, contains a mercury column of length L0 at 0∘ C. If γ is the coefficient of cubical expansion of mercury α the coefficient of linear expansion of glass, the length of the mercury column when the temperature rises to t∘ C is (assuming that t not more than 100∘ C)
Answer» A vertical glass tube, closed at the bottom, contains a mercury column of length $L_{0}$ at $0^{\circ} C$ . If $γ$ is the coefficient of cubical expansion of mercury $α$ the coefficient of linear expansion of glass, the length of the mercury column when the temperature rises to $t^{\circ} C$ is (assuming that $t$ not more than $100^{\circ} C$ )

Discussion

9.	If a body is in equilibrium under a set of non collinear forces then the minimum number of forces has to be
Answer» If a body is in equilibrium under a set of non collinear forces then the minimum number of forces has to be

Discussion

10.	The power factor of a series RC circuit is 1√2 . If the frequency of the applied AC is halved, the power factor will be
Answer» The power factor of a series RC circuit is $\frac{1}{\sqrt{2}}$ . If the frequency of the applied AC is halved, the power factor will be

Discussion

11.	In the network shown, which is part of a larger network, the potential at P is greater than Q by 43 V. The potential difference across the battery A is
Answer» In the network shown, which is part of a larger network, the potential at P is greater than Q by 43 V. The potential difference across the battery A is

11.

In the network shown, which is part of a larger network, the potential at P is greater than Q by 43 V. The potential difference across the battery A is

Answer»

In the network shown, which is part of a larger network, the potential at P is greater than Q by 43 V. The potential difference across the battery A is

Discussion

12.	Two bikes moving in opposite directions approach each other with speed of 40 m/s and 20 m/s respectively. The first bike sounds a horn having a frequency 380 Hz. The frequency heard by the biker of the second bike is [velocity of sound in air is 340 m/s]
Answer» Two bikes moving in opposite directions approach each other with speed of $40 m/s$ and $20 m/s$ respectively. The first bike sounds a horn having a frequency $380 Hz$ . The frequency heard by the biker of the second bike is [velocity of sound in air is $340 m/s]$

Discussion

13.	On the basis of details given about two measuring instruments, select the correct statement: (i) Vernier callipers having main scale division = 0.05 cm and vernier scale division = 2.4550cm (ii) Screw gauge having pitch 0.5 mm and its circular scale has 50 divisions
Answer» On the basis of details given about two measuring instruments, select the correct statement: (i) Vernier callipers having main scale division = 0.05 cm and vernier scale division = $\frac{2.45}{50}$ cm (ii) Screw gauge having pitch 0.5 mm and its circular scale has 50 divisions

13.

On the basis of details given about two measuring instruments, select the correct statement: (i) Vernier callipers having main scale division = 0.05 cm and vernier scale division = 2.4550cm (ii) Screw gauge having pitch 0.5 mm and its circular scale has 50 divisions

Answer»

On the basis of details given about two measuring instruments, select the correct statement:

(i) Vernier callipers having main scale division = 0.05 cm and vernier scale division = $\frac{2.45}{50}$ cm

(ii) Screw gauge having pitch 0.5 mm and its circular scale has 50 divisions

Discussion

14.	For given shape of wave at time t=t0, velocity of particle at x=x0 is twice the wave velocity of given transverse wave. Find the slope of wave at x=x0.
Answer» For given shape of wave at time $t = t_{0}$ , velocity of particle at $x = x_{0}$ is twice the wave velocity of given transverse wave. Find the slope of wave at $x = x_{0}$ .

Discussion

15.	Describe how acceleration can be divided into two tangential and normal components
Answer» Describe how acceleration can be divided into two tangential and normal components

Discussion

16.	A parallel plate capacitor is charged and then isolated. The effect of increasing the plate separation on charge, potential and capacitance respectively are
Answer» A parallel plate capacitor is charged and then isolated. The effect of increasing the plate separation on charge, potential and capacitance respectively are

Discussion

17.	A sphere and a cube of same material and same volume are heated up to same temperature and allowed to cool in the same surroundings. The ratio of the amounts of radiations emitted in equal time1 intervals will be
Answer» A sphere and a cube of same material and same volume are heated up to same temperature and allowed to cool in the same surroundings. The ratio of the amounts of radiations emitted in equal time1 intervals will be

Discussion

18.	The coefficient of volume expansion of mercury is 20 times the coefficient of linear expansion of glass. Find the volume of mercury that must be poured into a glass vessel of volume V so that the volume above mercury may remain constant at all temperature
Answer» The coefficient of volume expansion of mercury is 20 times the coefficient of linear expansion of glass. Find the volume of mercury that must be poured into a glass vessel of volume V so that the volume above mercury may remain constant at all temperature

Discussion

19.	A string of negligible mass going over a clamped pulley of mass m supports a block of mass M as shown in the figure. The force on the pulley by the clamp is given by
Answer» A string of negligible mass going over a clamped pulley of mass $m$ supports a block of mass $M$ as shown in the figure. The force on the pulley by the clamp is given by

Discussion

20.	Two discs are rotating about their axes, normal to the disc and passing through the centres of the discs. Disc D1 has 2 kg mass and 0.2 m radius and its initial angular velocity is 50 rad/s. Disc D2 has 4 kg mass, 0.1 m radius and its initial angular velocity is 200 rad/s. The two discs are brought in contact face to face, with their axes of rotation coincident. The final angular velocity (in rad/s) of the system is
Answer» Two discs are rotating about their axes, normal to the disc and passing through the centres of the discs. Disc $D_{1}$ has $2 kg$ mass and $0.2 m$ radius and its initial angular velocity is $50 rad/s$ . Disc $D_{2}$ has $4 kg$ mass, $0.1 m$ radius and its initial angular velocity is $200 rad/s$ . The two discs are brought in contact face to face, with their axes of rotation coincident. The final angular velocity (in $rad/s$ ) of the system is

Discussion

21.	Three particles of masses 1.0 kg and 2.0 kg and 3.0 kg are placed at the corners A,B and C respectively of an equilateral triangle ABC of edge 1 m.Locate the centre of mass of the system.
Answer» Three particles of masses 1.0 kg and 2.0 kg and 3.0 kg are placed at the corners A,B and C respectively of an equilateral triangle ABC of edge 1 m.Locate the centre of mass of the system.

Discussion

22.	Moment of inertia of hemispherical shell of mass M and radius R about axis passing through its center of mass as shown in figure is 53xMR2. Here x is
Answer» Moment of inertia of hemispherical shell of mass M and radius R about axis passing through its center of mass as shown in figure is $\frac{5}{3 x} M R^{2}$ . Here x is

Discussion

23.	Velocity of block B in the given arrangement is 300 mm/sec towards right. Then velocity of A will be
Answer» Velocity of block B in the given arrangement is $300 m m / s e c$ towards right. Then velocity of A will be

Discussion

24.	Reading shown in two spring balances S1 and S2 is 90 kg and 30 kg respectively when lift is accelerating upwards with acceleration 10 m/s2. The mass is stationary with respect to lift. Then the mass of the block will be
Answer» Reading shown in two spring balances S1 and S2 is 90 kg and 30 kg respectively when lift is accelerating upwards with acceleration 10 m/s2. The mass is stationary with respect to lift. Then the mass of the block will be

24.

Reading shown in two spring balances S1 and S2 is 90 kg and 30 kg respectively when lift is accelerating upwards with acceleration 10 m/s2. The mass is stationary with respect to lift. Then the mass of the block will be

Answer»

Reading shown in two spring balances S1 and S2 is 90 kg and 30 kg respectively when lift is accelerating upwards with acceleration 10 m/s2. The mass is stationary with respect to lift. Then the mass of the block will be

Discussion

25.	In a pn junction a) high potential at n side and a low potential at p side b) high potential at p side and a low potential at n side c) p and n both are at the same potential d) undetermined
Answer» In a pn junction a) high potential at n side and a low potential at p side b) high potential at p side and a low potential at n side c) p and n both are at the same potential d) undetermined

Discussion

26.	A body is projected at 30∘ with velocity v1 from point A on the ground. At the same time, another body is projected vertically upwards from B with velocity v2 from the ground. The point B lies vertically below the highest point of the trajectory of ball A. For both the bodies to collide, what should be the ratio of v1v2 ?
Answer» A body is projected at $30^{\circ}$ with velocity $v_{1}$ from point $A$ on the ground. At the same time, another body is projected vertically upwards from $B$ with velocity $v_{2}$ from the ground. The point $B$ lies vertically below the highest point of the trajectory of ball $A$ . For both the bodies to collide, what should be the ratio of $\frac{v_{1}}{v_{2}}$ ?

Discussion

27.	A bear jumps off a wall and falls on the ground in 1 sec.what is the colour of the bear?
Answer» A bear jumps off a wall and falls on the ground in 1 sec.what is the colour of the bear?

Discussion

28.	A stone is allowed to fall from the top of a tower 100 m high and at the same time another stone is projected vertically upwards from the ground with a velocity of 25 ms−1. The two stones will meet after
Answer» A stone is allowed to fall from the top of a tower $100 m$ high and at the same time another stone is projected vertically upwards from the ground with a velocity of $25 {ms}^{- 1}$ . The two stones will meet after

Discussion

29.	A block begins to slide down a rough inclined plane of angle 45∘ and moves 1 m in 4√2 second. What is the coefficient of friction between the plane and the block? g=10 m/s2
Answer» A block begins to slide down a rough inclined plane of angle $45^{\circ}$ and moves $1 m$ in $\sqrt[4]{2} second$ . What is the coefficient of friction between the plane and the block? $g = 10 m / s^{2}$

Discussion

30.	The pressure measured by a constant volume gas thermometer is 40 kPa at the triple point of water. What will be the pressure measured at the boiling point of water (100∘ C) ?
Answer» The pressure measured by a constant volume gas thermometer is 40 kPa at the triple point of water. What will be the pressure measured at the boiling point of water $(100^{\circ} C)$ ?

Discussion

31.	For a square sheet of side 1 m having uniform surface density, the position of COM is at x1. On the other hand, if surface density is varying as σ=2x kg/m2, COM is observed to be at position x2. The distance between x2 and x1 is :
Answer» For a square sheet of side $1 m$ having uniform surface density, the position of $COM$ is at $x_{1}$ . On the other hand, if surface density is varying as $σ = 2 x {kg/m}^{2}$ , $COM$ is observed to be at position $x_{2}$ . The distance between $x_{2}$ and $x_{1}$ is :

Discussion

32.	Which of the following is the necessary and sufficient criterion for a body to be called rigid?
Answer» Which of the following is the necessary and sufficient criterion for a body to be called rigid?

Discussion

33.	What will be the equivalent resistance of circuit shown in figure between points A and D
Answer» What will be the equivalent resistance of circuit shown in figure between points A and D

Discussion

34.	The initial velocity of a particle is 10 m/sec and its retardation is 2 m/sec2. The distance covered in the fifth second of the motion will be
Answer» The initial velocity of a particle is $10 m/sec$ and its retardation is $2 {m/sec}^{2}$ . The distance covered in the fifth second of the motion will be

Discussion

35.	The springs shown in the figure (12-E7) are all unstretched in the beginning when a man starts pulling the block. The man exerts a constant force F on the block. Find the amplitude and the frequency of the motion of the block.
Answer» The springs shown in the figure (12-E7) are all unstretched in the beginning when a man starts pulling the block. The man exerts a constant force F on the block. Find the amplitude and the frequency of the motion of the block.

35.

The springs shown in the figure (12-E7) are all unstretched in the beginning when a man starts pulling the block. The man exerts a constant force F on the block. Find the amplitude and the frequency of the motion of the block.

Answer»

The springs shown in the figure (12-E7) are all unstretched in the beginning when a man starts pulling the block. The man exerts a constant force F on the block. Find the amplitude and the frequency of the motion of the block.

Discussion

36.	Given in the figure are two blocks A and B of weight 20 N and 100 N, respectively. These are being pressed against a wall by a force as shown. If the coefficient of friction between the blocks is 0.1 and between block B and the wall is 0.15, the frictional force applied by the wall on block B is
Answer» Given in the figure are two blocks A and B of weight $20 N$ and $100 N$ , respectively. These are being pressed against a wall by a force as shown. If the coefficient of friction between the blocks is $0.1$ and between block B and the wall is $0.15$ , the frictional force applied by the wall on block B is

Discussion

37.	Force of 20N was applied on a circular wooden piece with area of 2cm2. Calculate the pressure on that area.
Answer» Force of $20 N$ was applied on a circular wooden piece with area of ${2 c m}^{2}$ . Calculate the pressure on that area.

Discussion

38.	Find the radius of gyration of a thin uniform rod of mass ′m′ and length l=9 m about an axis passing through one end and perpendicular to the rod as shown in figure.
Answer» Find the radius of gyration of a thin uniform rod of mass $^{'} m^{'}$ and length $l = 9 m$ about an axis passing through one end and perpendicular to the rod as shown in figure.

Discussion

39.	SO2 and CH4 are introduced in a vessel in the molar ratio 1:2 . The ratio of molecules of two gases present in the container when their rate of effusion becomes equal is :
Answer» $S O_{2}$ and $C H_{4}$ are introduced in a vessel in the molar ratio $1 : 2$ . The ratio of molecules of two gases present in the container when their rate of effusion becomes equal is :

Discussion

40.	At 273 K temperature and 76 cm Hg pressure, the density of a gas is 1.964 gL−1. The gas is :
Answer» At $273 K$ temperature and $76 c m H g$ pressure, the density of a gas is $1.964 g L^{- 1} .$ The gas is :

Discussion

41.	Carry is running over a circular track of radius 10 m. If he runs 2 m in 1 second. Find the angle substended by carry at the center of circular track in 1 second.
Answer» Carry is running over a circular track of radius $10 m$ . If he runs $2 m$ in $1 second$ . Find the angle substended by carry at the center of circular track in $1$ second.

Discussion

42.	The amplitude of a body performing simple harmonic motion is 1.5 m. Write down the distance covered and the displacement of the body after one complete oscillation.
Answer» The amplitude of a body performing simple harmonic motion is 1.5 m. Write down the distance covered and the displacement of the body after one complete oscillation.

Discussion

43.	A satellite does not need any fuel to orbit the earth why?
Answer» A satellite does not need any fuel to orbit the earth why?

Discussion

44.	A solid sphere of radius r is gently placed on a rough horizontal surface with an initial angular speed ω0 but no linear velocity. If the coefficient of friction is μ, then the time t when the slipping will stop is
Answer» A solid sphere of radius $r$ is gently placed on a rough horizontal surface with an initial angular speed $ω_{0}$ but no linear velocity. If the coefficient of friction is $μ$ , then the time $t$ when the slipping will stop is

Discussion

45.	Two stones, having masses in the ratio of 3 : 2, are dropped from the heights in the ratio of 4 : 9. The ratio of magnitudes of their linear momenta just before reaching the ground is (neglect air resistance)
Answer» Two stones, having masses in the ratio of 3 : 2, are dropped from the heights in the ratio of 4 : 9. The ratio of magnitudes of their linear momenta just before reaching the ground is (neglect air resistance)

Discussion

46.	Two capacitors of capacitances 20.0 pF and 50.0 pF are connected in series with a 6.00 V battery. Find (a) the potential difference across each capacitor and (b) the energy stored in each capacitor.
Answer» Two capacitors of capacitances 20.0 pF and 50.0 pF are connected in series with a 6.00 V battery. Find (a) the potential difference across each capacitor and (b) the energy stored in each capacitor.

Discussion

47.	The resultant capacitance (in μF) between the points A and B in the figure is
Answer» The resultant capacitance (in $μ F$ ) between the points A and B in the figure is

Discussion

48.	An object is thrown up with a speed of 50m/s. Its height from the ground after 7 s is ( take g =10m/s^2)
Answer» An object is thrown up with a speed of 50m/s. Its height from the ground after 7 s is ( take g =10m/s^2)

Discussion

49.	(a) Using Biot-Savart's law, derive the expression for the magnetic field in the vector form at a point on the axis of a circular current loop. (b) What does a toroid consist of ? Find out the expression for the magnetic field inside a toroid for N turns of the coil having the average radius r and carrying a current I. Show that the magnetic field in the open space inside and exterior to the toroid is zero.
Answer» (a) Using Biot-Savart's law, derive the expression for the magnetic field in the vector form at a point on the axis of a circular current loop. (b) What does a toroid consist of ? Find out the expression for the magnetic field inside a toroid for N turns of the coil having the average radius r and carrying a current I. Show that the magnetic field in the open space inside and exterior to the toroid is zero.

Discussion

50.	The lens formula is
Answer» The lens formula is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A capillary tube of radius of cross section r is immersed in water and water rises in it to a height h. The mass of the water in the capillary is m. Another capillary is also immersed in water. The mass of water that rises in this capillary is m2. The radius of cross section of this capillary is

Two similar coils of radius R are lying concentrically with their planes at right angles to each other, if the current through them are 2I and 4I respectively, then net magnetic induction at the centre is

The mass of a bucket containing water is 10 kg. What is the work done in pulling up the bucket from a well of depth 10 m if water is pouring out at a uniform rate from a hole in it and there is loss of 2kg of water from it while it reaches the top (g=10m/sec2)

River is flowing at 3 Km/h in the west direction and You can swim at a maximum speed of 5 Km/h , Given if the river is 12 km wide, How long will you take to cross the river?

A force →F=3^i+c^j+2^k acting on a particle causes a displacement →S=−4^i+2^j−3^k in its own direction. If the work done by the force is 6 J, then the value of c will be

Consider the network shown in the figure. The current in 2Ω resistor is 6A. Then power delivered in 12Ω resistor is (4n) W .find n. ___

A bar magnet, of magnetic moment M, is placed in a magnetic field of induction B. The torque exerted on it is

If a body is in equilibrium under a set of non collinear forces then the minimum number of forces has to be

The power factor of a series RC circuit is 1√2 . If the frequency of the applied AC is halved, the power factor will be

In the network shown, which is part of a larger network, the potential at P is greater than Q by 43 V. The potential difference across the battery A is

Two bikes moving in opposite directions approach each other with speed of 40 m/s and 20 m/s respectively. The first bike sounds a horn having a frequency 380 Hz. The frequency heard by the biker of the second bike is [velocity of sound in air is 340 m/s]

On the basis of details given about two measuring instruments, select the correct statement: (i) Vernier callipers having main scale division = 0.05 cm and vernier scale division = 2.4550cm (ii) Screw gauge having pitch 0.5 mm and its circular scale has 50 divisions

For given shape of wave at time t=t0, velocity of particle at x=x0 is twice the wave velocity of given transverse wave. Find the slope of wave at x=x0.

Describe how acceleration can be divided into two tangential and normal components

A parallel plate capacitor is charged and then isolated. The effect of increasing the plate separation on charge, potential and capacitance respectively are

A sphere and a cube of same material and same volume are heated up to same temperature and allowed to cool in the same surroundings. The ratio of the amounts of radiations emitted in equal time1 intervals will be

The coefficient of volume expansion of mercury is 20 times the coefficient of linear expansion of glass. Find the volume of mercury that must be poured into a glass vessel of volume V so that the volume above mercury may remain constant at all temperature

A string of negligible mass going over a clamped pulley of mass m supports a block of mass M as shown in the figure. The force on the pulley by the clamp is given by

Three particles of masses 1.0 kg and 2.0 kg and 3.0 kg are placed at the corners A,B and C respectively of an equilateral triangle ABC of edge 1 m.Locate the centre of mass of the system.

Moment of inertia of hemispherical shell of mass M and radius R about axis passing through its center of mass as shown in figure is 53xMR2. Here x is

Velocity of block B in the given arrangement is 300 mm/sec towards right. Then velocity of A will be

Reading shown in two spring balances S1 and S2 is 90 kg and 30 kg respectively when lift is accelerating upwards with acceleration 10 m/s2. The mass is stationary with respect to lift. Then the mass of the block will be

In a pn junction a) high potential at n side and a low potential at p side b) high potential at p side and a low potential at n side c) p and n both are at the same potential d) undetermined

A bear jumps off a wall and falls on the ground in 1 sec.what is the colour of the bear?

A stone is allowed to fall from the top of a tower 100 m high and at the same time another stone is projected vertically upwards from the ground with a velocity of 25 ms−1. The two stones will meet after

A block begins to slide down a rough inclined plane of angle 45∘ and moves 1 m in 4√2 second. What is the coefficient of friction between the plane and the block? g=10 m/s2

The pressure measured by a constant volume gas thermometer is 40 kPa at the triple point of water. What will be the pressure measured at the boiling point of water (100∘ C) ?

For a square sheet of side 1 m having uniform surface density, the position of COM is at x1. On the other hand, if surface density is varying as σ=2x kg/m2, COM is observed to be at position x2. The distance between x2 and x1 is :

Which of the following is the necessary and sufficient criterion for a body to be called rigid?

What will be the equivalent resistance of circuit shown in figure between points A and D

The initial velocity of a particle is 10 m/sec and its retardation is 2 m/sec2. The distance covered in the fifth second of the motion will be

The springs shown in the figure (12-E7) are all unstretched in the beginning when a man starts pulling the block. The man exerts a constant force F on the block. Find the amplitude and the frequency of the motion of the block.

Given in the figure are two blocks A and B of weight 20 N and 100 N, respectively. These are being pressed against a wall by a force as shown. If the coefficient of friction between the blocks is 0.1 and between block B and the wall is 0.15, the frictional force applied by the wall on block B is

Force of 20N was applied on a circular wooden piece with area of 2cm2. Calculate the pressure on that area.

Find the radius of gyration of a thin uniform rod of mass ′m′ and length l=9 m about an axis passing through one end and perpendicular to the rod as shown in figure.

SO2 and CH4 are introduced in a vessel in the molar ratio 1:2 . The ratio of molecules of two gases present in the container when their rate of effusion becomes equal is :

At 273 K temperature and 76 cm Hg pressure, the density of a gas is 1.964 gL−1. The gas is :

Carry is running over a circular track of radius 10 m. If he runs 2 m in 1 second. Find the angle substended by carry at the center of circular track in 1 second.

The amplitude of a body performing simple harmonic motion is 1.5 m. Write down the distance covered and the displacement of the body after one complete oscillation.

A satellite does not need any fuel to orbit the earth why?

A solid sphere of radius r is gently placed on a rough horizontal surface with an initial angular speed ω0 but no linear velocity. If the coefficient of friction is μ, then the time t when the slipping will stop is

Two stones, having masses in the ratio of 3 : 2, are dropped from the heights in the ratio of 4 : 9. The ratio of magnitudes of their linear momenta just before reaching the ground is (neglect air resistance)

Two capacitors of capacitances 20.0 pF and 50.0 pF are connected in series with a 6.00 V battery. Find (a) the potential difference across each capacitor and (b) the energy stored in each capacitor.

The resultant capacitance (in μF) between the points A and B in the figure is

An object is thrown up with a speed of 50m/s. Its height from the ground after 7 s is ( take g =10m/s^2)

The lens formula is