50278 + Interview Questions in Physics

1.	On a railway curve, the outside rail is laid higher than the inside one so that resultant force exerted on the wheels of the rail car by the tops of the rails will
Answer» On a railway curve, the outside rail is laid higher than the inside one so that resultant force exerted on the wheels of the rail car by the tops of the rails will

Discussion

2.	Find the maximum velocity for skidding for a car moved on a circular track of radius 100 m. The coefficient of friction between the road and tyre is 0.2
Answer» Find the maximum velocity for skidding for a car moved on a circular track of radius 100 m. The coefficient of friction between the road and tyre is 0.2

Discussion

3.	There are four identical metal plates each of area A. The plates are placed at equal distance d successively as shown in figure. If A ϵ0d=2 μF and source of emf 10 V is connected between x and y, then charge on plate x will be
Answer» There are four identical metal plates each of area $A$ . The plates are placed at equal distance $d$ successively as shown in figure. If $\frac{A ϵ_{0}}{d} = 2 μ F$ and source of emf $10 V$ is connected between $x$ and $y$ , then charge on plate $x$ will be

Discussion

4.	A parachutist drops first freely from an aeroplane for 10 s and then parachute opens out. Now he descends with a net retardation of 2.5 m/s2. If he bails out of the plane at a height of 2495 m and g=10 m/s2, his velocity on reaching the ground in m/s will be
Answer» A parachutist drops first freely from an aeroplane for $10 s$ and then parachute opens out. Now he descends with a net retardation of $2.5 {m/s}^{2}$ . If he bails out of the plane at a height of $2495 m$ and $g = 10 {m/s}^{2}$ , his velocity on reaching the ground in $m/s$ will be

Discussion

5.	The blades of a wind mill sweep out a circle of area A. If wind flows with velocity v perpendicular to blades of wind mill and its density is ρ, then the mechanical power received by wind mill is
Answer» The blades of a wind mill sweep out a circle of area A. If wind flows with velocity v perpendicular to blades of wind mill and its density is $ρ$ , then the mechanical power received by wind mill is

Discussion

6.	Is it possible that a body has centripetal acceleration but not tangential acceleration? And tangential acceleration but not angular acceleration?
Answer» Is it possible that a body has centripetal acceleration but not tangential acceleration? And tangential acceleration but not angular acceleration?

Discussion

7.	The figure shows the displacement-time graph of a body moving in a straight line. Which of the following shows the corresponding velocity-time graph?
Answer» The figure shows the displacement-time graph of a body moving in a straight line. Which of the following shows the corresponding velocity-time graph?

Discussion

8.	Figure shows a smooth curved track terminating in a smooth horizontal part. A spring of spring constant 400 N/m is attached at one end to a wedge fixed rigidly with the horizontal part. A 40 g mass is released from rest at a height of 4.9 m on the curved track. Find the maximum compression of the spring. (g = 9.8 m/s2)
Answer» Figure shows a smooth curved track terminating in a smooth horizontal part. A spring of spring constant 400 N/m is attached at one end to a wedge fixed rigidly with the horizontal part. A 40 g mass is released from rest at a height of 4.9 m on the curved track. Find the maximum compression of the spring. (g = 9.8 m/ $s^{2}$ )

8.

Figure shows a smooth curved track terminating in a smooth horizontal part. A spring of spring constant 400 N/m is attached at one end to a wedge fixed rigidly with the horizontal part. A 40 g mass is released from rest at a height of 4.9 m on the curved track. Find the maximum compression of the spring. (g = 9.8 m/s2)

Answer»

Figure shows a smooth curved track terminating in a smooth horizontal part. A spring of spring constant 400 N/m is attached at one end to a wedge fixed rigidly with the horizontal part. A 40 g mass is released from rest at a height of 4.9 m on the curved track. Find the maximum compression of the spring. (g = 9.8 m/ $s^{2}$ )

Discussion

9.	If T is the reverberation time of an auditorium of volume V then
Answer» If T is the reverberation time of an auditorium of volume V then

9.

If T is the reverberation time of an auditorium of volume V then

Answer»

If T is the reverberation time of an auditorium of volume V then

Discussion

10.	In the formation of a molecule by an atom
Answer» In the formation of a molecule by an atom

10.

In the formation of a molecule by an atom

Answer»

In the formation of a molecule by an atom

Discussion

11.	Beats are produced by the superposition of two harmonic waves if:
Answer» Beats are produced by the superposition of two harmonic waves if:

Discussion

12.	A spherical black body with a radius of 12 cm radiates 450 W power at 500 K. If the radius were halved and the temperature doubled, the power radiated in W would be
Answer» A spherical black body with a radius of $12 cm$ radiates $450 W$ power at $500 K$ . If the radius were halved and the temperature doubled, the power radiated in $W$ would be

Discussion

13.	The number of turns in a coil of wire of fixed radius is 600 and its self inductance is 108 mH. The self inductance of a coil of 500 turns will be (in mH)
Answer» The number of turns in a coil of wire of fixed radius is 600 and its self inductance is 108 mH. The self inductance of a coil of 500 turns will be (in mH)

Discussion

14.	What is a choke coil
Answer» What is a choke coil

Discussion

15.	It is desired to increase the fundamental resonance frequency in a tube which is closed at one end. This can be achieved by
Answer» It is desired to increase the fundamental resonance frequency in a tube which is closed at one end. This can be achieved by

Discussion

16.	A radio transmitter radiates 1 kW power at a wavelength 198.6 metres. How many photons does it emit per second
Answer» A radio transmitter radiates 1 kW power at a wavelength 198.6 metres. How many photons does it emit per second

Discussion

17.	An automobile moving with a speed 60kmph can break to stop at a distance 20m. A car is moving twice as fast as this, the stopping distance will be?
Answer» An automobile moving with a speed 60kmph can break to stop at a distance 20m. A car is moving twice as fast as this, the stopping distance will be?

Discussion

18.	Figure (38-E27) shows a square frame of wire having a total resistance r placed coplanarly with a long, straight wire. The wire carries a current i given by i=i0 sin ωt. Find (a) the flux of the magnetic field through the square frame, (b) the emf induced in the frame and (c) the heat 20x developed in the frame in the time interval 0 to 20πω
Answer» Figure (38-E27) shows a square frame of wire having a total resistance r placed coplanarly with a long, straight wire. The wire carries a current i given by $i = i_{0} s i n ω t$ . Find (a) the flux of the magnetic field through the square frame, (b) the emf induced in the frame and (c) the heat 20x developed in the frame in the time interval 0 to $\frac{20 π}{ω}$

18.

Figure (38-E27) shows a square frame of wire having a total resistance r placed coplanarly with a long, straight wire. The wire carries a current i given by i=i0 sin ωt. Find (a) the flux of the magnetic field through the square frame, (b) the emf induced in the frame and (c) the heat 20x developed in the frame in the time interval 0 to 20πω

Answer»

Figure (38-E27) shows a square frame of wire having a total resistance r placed coplanarly with a long, straight wire. The wire carries a current i given by $i = i_{0} s i n ω t$ . Find (a) the flux of the magnetic field through the square frame, (b) the emf induced in the frame and (c) the heat 20x developed in the frame in the time interval 0 to $\frac{20 π}{ω}$

Discussion

19.	140 cal of heat is required to raise the temperature of 2 mole of a diatomic gas at constant pressure from 0∘C to 10∘C. How much heat will be required to rise its temperature from 0∘C to 10∘C at constant volume?
Answer» $140 cal$ of heat is required to raise the temperature of $2$ mole of a diatomic gas at constant pressure from $0^{\circ} C$ to $10^{\circ} C$ . How much heat will be required to rise its temperature from $0^{\circ} C$ to $10^{\circ} C$ at constant volume?

Discussion

20.	Find the derivative of functions cosx, cosecx, secx, cotx using first principle
Answer» Find the derivative of functions $c o s x$ , $c o s e c x$ , $s e c x$ , $c o t x$ using first principle

Discussion

21.	What does Area under POSITION-TIME graph give? Just curious to know, sorry if it's silly.
Answer» What does Area under POSITION-TIME graph give? Just curious to know, sorry if it's silly.

21.

What does Area under POSITION-TIME graph give? Just curious to know, sorry if it's silly.

Answer»

What does Area under POSITION-TIME graph give?

Just curious to know, sorry if it's silly.

Discussion

22.	If →a=^i+^j+^k, and →b=^j−^k then area vector of plane formed by →a and →b is
Answer» If $\to a =^i +^j +^k$ , and $\to b =^j -^k$ then area vector of plane formed by $\to a$ and $\to b$ is

Discussion

23.	Which of the following expressions correctly represents the relationship between the average molar kinetic energy ¯¯¯¯¯¯¯¯¯¯¯K.E, of CO and N2 molecules at the same temperature
Answer» Which of the following expressions correctly represents the relationship between the average molar kinetic energy $¯ ¯¯¯¯¯¯¯¯¯ ¯ K . E$ , of CO and $N_{2}$ molecules at the same temperature

23.

Which of the following expressions correctly represents the relationship between the average molar kinetic energy ¯¯¯¯¯¯¯¯¯¯¯K.E, of CO and N2 molecules at the same temperature

Answer»

Which of the following expressions correctly represents the relationship between the average molar kinetic energy $¯ ¯¯¯¯¯¯¯¯¯ ¯ K . E$ , of CO and $N_{2}$ molecules at the same temperature

Discussion

24.	Four spheres of mass M and radius R each are touching each other as shown. Calculate the MI about the axis which passes through centre of the square and perpendicular to the plane.
Answer» Four spheres of mass $M$ and radius $R$ each are touching each other as shown. Calculate the MI about the axis which passes through centre of the square and perpendicular to the plane.

Discussion

25.	A wave propagates on a string in the positive x-direction at a velocity v. The shape of the string at t=t0 is given by g(x,t0)=A sin(xa) . Write the wave equation for a general time t.
Answer» A wave propagates on a string in the positive x-direction at a velocity v. The shape of the string at $t = t_{0}$ is given by $g (x, t_{0}) = A s i n (\frac{x}{a})$ . Write the wave equation for a general time t.

Discussion

26.	Find the equivalent resistance of the network shown in figure (32-E7) between the points a and b.
Answer» Find the equivalent resistance of the network shown in figure (32-E7) between the points a and b.

26.

Find the equivalent resistance of the network shown in figure (32-E7) between the points a and b.

Answer»

Find the equivalent resistance of the network shown in figure (32-E7) between the points a and b.

Discussion

27.	What is the right hand screw rule in case of cross product?
Answer» What is the right hand screw rule in case of cross product?

Discussion

28.	Two balls of masses 2 kg and 4 kg are moved towards each other with velocities 4 m/s and 2 m/s respectively on a frictionless surface. Find the impulse of maximum deformation for the ball of 4 kg mass.
Answer» Two balls of masses $2 kg$ and $4 kg$ are moved towards each other with velocities $4 m/s$ and $2 m/s$ respectively on a frictionless surface. Find the impulse of maximum deformation for the ball of $4 kg$ mass.

Discussion

29.	The approximate wavelength of a photon of energy 2.48 eV is
Answer» The approximate wavelength of a photon of energy 2.48 eV is

Discussion

30.	According to the electromagnetic theory of Maxwell when a charged particle moves under the influence of attractive forces loses energy continuously in the form of electromagnetic radiation. So so if the electrons move around the nucleus in circular orbits all the electrons should fall into the nucleus which leads to instability of the atom. Then how are molecules formed from these unstable atoms?
Answer» According to the electromagnetic theory of Maxwell when a charged particle moves under the influence of attractive forces loses energy continuously in the form of electromagnetic radiation. So so if the electrons move around the nucleus in circular orbits all the electrons should fall into the nucleus which leads to instability of the atom. Then how are molecules formed from these unstable atoms?

Discussion

31.	A bird is sitting in a large closed cage which is placed on a spring balance. It records a weight of 25 N. The bird (mass m = 0.5 kg) flies upward in the cage with an acceleration of 2 m/s2. The spring balance will now record a weight of
Answer» A bird is sitting in a large closed cage which is placed on a spring balance. It records a weight of 25 N. The bird (mass m = 0.5 kg) flies upward in the cage with an acceleration of 2 $m / s^{2}$ . The spring balance will now record a weight of

Discussion

32.	What is the mutual inductance of a two-loop system as shown with centre separation l
Answer» What is the mutual inductance of a two-loop system as shown with centre separation l

Discussion

33.	A ball of mass 150g starts moving with an acceleration of 20 m/s2. When hit by a force, which acts on it for 0.1 sec. The impulsive force is
Answer» A ball of mass 150g starts moving with an acceleration of 20 $m / s^{2}$ . When hit by a force, which acts on it for 0.1 sec. The impulsive force is

Discussion

34.	Two conducting circular loops of radii R1 and R2 are placed in the same plane with their centres coinciding. If R1≫R2, the mutual inductance M between them will be directly proportional to
Answer» Two conducting circular loops of radii $R_{1} a n d R_{2}$ are placed in the same plane with their centres coinciding. If $R_{1} ≫ R_{2}$ , the mutual inductance M between them will be directly proportional to

Discussion

35.	An unidentified gas X when heated, is found to radiate light of wavelengths 423 nm, 520 nm, and 640 nm. In another situation, after white light was passed through a cooled sample of gas X, certain wavelengths were found missing. The missing wavelengths could be -
Answer» An unidentified gas X when heated, is found to radiate light of wavelengths 423 nm, 520 nm, and 640 nm. In another situation, after white light was passed through a cooled sample of gas X, certain wavelengths were found missing. The missing wavelengths could be -

Discussion

36.	Declination is the angle between:
Answer» Declination is the angle between:

Discussion

37.	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 by uniform retardation in further 40 s. What is the magnitude average velocity during this period?
Answer» 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 by uniform retardation in further $40 s$ . What is the magnitude average velocity during this period?

Discussion

38.	The equation of a particle executing SHM is x=(5m)sin[(π s−1)t+π3]. What is its amplitude, time period, maximum speed and velocity. At t = 1s?
Answer» The equation of a particle executing SHM is $x = (5 m) s i n [(π s^{- 1}) t + \frac{π}{3}]$ . What is its amplitude, time period, maximum speed and velocity. At t = 1s?

Discussion

39.	The following velocity-time graph depicts the motion of a vehicle. During what part of the motion was the vehicle experiencing zero acceleration?
Answer» The following velocity-time graph depicts the motion of a vehicle. During what part of the motion was the vehicle experiencing zero acceleration?

39.

The following velocity-time graph depicts the motion of a vehicle. During what part of the motion was the vehicle experiencing zero acceleration?

Answer»

The following velocity-time graph depicts the motion of a vehicle. During what part of the motion was the vehicle experiencing zero acceleration?

Discussion

40.	What will be the reading of a d.c. ammeter in an a.c. circuit where the current flowing is 4A
Answer» What will be the reading of a d.c. ammeter in an a.c. circuit where the current flowing is 4A

Discussion

41.	__ is the S.I unit of time.
Answer» __ is the S.I unit of time.

Discussion

42.	Two small spheres each having the charge + q are suspended by insulating threads of length L from a hook. This arrangement is taken in space where there is no gravitational effect, then the angle between the two suspensions and the tension in each will be
Answer» Two small spheres each having the charge + q are suspended by insulating threads of length L from a hook. This arrangement is taken in space where there is no gravitational effect, then the angle between the two suspensions and the tension in each will be

Discussion

43.	A block of mass m is dept on a horizontal table. If the static friction coefficient is μ Find the frictional force acting on the block.
Answer» A block of mass m is dept on a horizontal table. If the static friction coefficient is $μ$ Find the frictional force acting on the block.

Discussion

44.	The angle made by the string of a simple pendulum with the vertical depends on time as θ=π90 sin [(πs−1)t].Find the length of the pendulum if g = π2ms2.
Answer» The angle made by the string of a simple pendulum with the vertical depends on time as $θ = \frac{π}{90} s i n [(π s^{- 1}) t]$ .Find the length of the pendulum if $g = π^{2} \frac{m}{s^{2}}$ .

44.

The angle made by the string of a simple pendulum with the vertical depends on time as θ=π90 sin [(πs−1)t].Find the length of the pendulum if g = π2ms2.

Answer»

The angle made by the string of a simple pendulum with the vertical depends on time as

$θ = \frac{π}{90} s i n [(π s^{- 1}) t]$ .Find the length of the pendulum if $g = π^{2} \frac{m}{s^{2}}$ .

Discussion

45.	If the radius of a sphere is measured as 9 cm with an error 0.03cm , then find the approximate error in calculating its volume.
Answer» If the radius of a sphere is measured as 9 cm with an error 0.03cm , then find the approximate error in calculating its volume.

Discussion

46.	A carrom board (4 ft × 4 ft square) has the queen at the centre. The queen, hit by the striker moves to the front edge, rebounds and goes in the hole behind the striking line. Find the magnitude of displacement of the queen (a) from the centre to the front edge, (b) from the front edge to the hole and (c) from the centre to the hole.
Answer» A carrom board (4 ft $\times$ 4 ft square) has the queen at the centre. The queen, hit by the striker moves to the front edge, rebounds and goes in the hole behind the striking line. Find the magnitude of displacement of the queen (a) from the centre to the front edge, (b) from the front edge to the hole and (c) from the centre to the hole.

46.

A carrom board (4 ft × 4 ft square) has the queen at the centre. The queen, hit by the striker moves to the front edge, rebounds and goes in the hole behind the striking line. Find the magnitude of displacement of the queen (a) from the centre to the front edge, (b) from the front edge to the hole and (c) from the centre to the hole.

Answer»

A carrom board (4 ft $\times$ 4 ft square) has the queen at the centre. The queen, hit by the striker moves to the front edge, rebounds and goes in the hole behind the striking line. Find the magnitude of displacement of the queen

(a) from the centre to the front edge,

(b) from the front edge to the hole and (c) from the centre to the hole.

Discussion

47.	A body of mass 'M' moving with a speed of 'u' has a head-on collision with a body of mass 'm' originally at rest. If M >> m, then the speed of the body of mass 'm' after the collision, will be nearly
Answer» A body of mass 'M' moving with a speed of 'u' has a head-on collision with a body of mass 'm' originally at rest. If M >> m, then the speed of the body of mass 'm' after the collision, will be nearly

Discussion

48.	The coefficient of linear expansion of an inhomogeneous rod changes linearly from α1 to α2 from one end to the other end of the rod. The effective coefficient of linear expansion of rod is
Answer» The coefficient of linear expansion of an inhomogeneous rod changes linearly from $α_{1}$ to $α_{2}$ from one end to the other end of the rod. The effective coefficient of linear expansion of rod is

Discussion

49.	A point moves on x-axis according to x=4sin(πt), find the time when its speed becomes zero
Answer» A point moves on x-axis according to $x = 4 sin (π t)$ , find the time when its speed becomes zero

Discussion

50.	An open pipe of length 100 cm is resonating with a tuning fork. To what depth the open pipe is to be immersed vertically in a trough of water, so that the pipe again resonates with the same tuning fork? (neglect end correction)
Answer» An open pipe of length 100 cm is resonating with a tuning fork. To what depth the open pipe is to be immersed vertically in a trough of water, so that the pipe again resonates with the same tuning fork? (neglect end correction)

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

On a railway curve, the outside rail is laid higher than the inside one so that resultant force exerted on the wheels of the rail car by the tops of the rails will

Find the maximum velocity for skidding for a car moved on a circular track of radius 100 m. The coefficient of friction between the road and tyre is 0.2

There are four identical metal plates each of area A. The plates are placed at equal distance d successively as shown in figure. If A ϵ0d=2 μF and source of emf 10 V is connected between x and y, then charge on plate x will be

A parachutist drops first freely from an aeroplane for 10 s and then parachute opens out. Now he descends with a net retardation of 2.5 m/s2. If he bails out of the plane at a height of 2495 m and g=10 m/s2, his velocity on reaching the ground in m/s will be

The blades of a wind mill sweep out a circle of area A. If wind flows with velocity v perpendicular to blades of wind mill and its density is ρ, then the mechanical power received by wind mill is

Is it possible that a body has centripetal acceleration but not tangential acceleration? And tangential acceleration but not angular acceleration?

The figure shows the displacement-time graph of a body moving in a straight line. Which of the following shows the corresponding velocity-time graph?

If T is the reverberation time of an auditorium of volume V then

In the formation of a molecule by an atom

Beats are produced by the superposition of two harmonic waves if:

A spherical black body with a radius of 12 cm radiates 450 W power at 500 K. If the radius were halved and the temperature doubled, the power radiated in W would be

The number of turns in a coil of wire of fixed radius is 600 and its self inductance is 108 mH. The self inductance of a coil of 500 turns will be (in mH)

What is a choke coil

It is desired to increase the fundamental resonance frequency in a tube which is closed at one end. This can be achieved by

A radio transmitter radiates 1 kW power at a wavelength 198.6 metres. How many photons does it emit per second

An automobile moving with a speed 60kmph can break to stop at a distance 20m. A car is moving twice as fast as this, the stopping distance will be?

140 cal of heat is required to raise the temperature of 2 mole of a diatomic gas at constant pressure from 0∘C to 10∘C. How much heat will be required to rise its temperature from 0∘C to 10∘C at constant volume?

Find the derivative of functions cosx, cosecx, secx, cotx using first principle​​​​​​

What does Area under POSITION-TIME graph give? Just curious to know, sorry if it's silly.

If →a=^i+^j+^k, and →b=^j−^k then area vector of plane formed by →a and →b is

Which of the following expressions correctly represents the relationship between the average molar kinetic energy ¯¯¯¯¯¯¯¯¯¯¯K.E, of CO and N2 molecules at the same temperature

Four spheres of mass M and radius R each are touching each other as shown. Calculate the MI about the axis which passes through centre of the square and perpendicular to the plane.

A wave propagates on a string in the positive x-direction at a velocity v. The shape of the string at t=t0 is given by g(x,t0)=A sin(xa) . Write the wave equation for a general time t.

Find the equivalent resistance of the network shown in figure (32-E7) between the points a and b.

What is the right hand screw rule in case of cross product?

Two balls of masses 2 kg and 4 kg are moved towards each other with velocities 4 m/s and 2 m/s respectively on a frictionless surface. Find the impulse of maximum deformation for the ball of 4 kg mass.

The approximate wavelength of a photon of energy 2.48 eV is

A bird is sitting in a large closed cage which is placed on a spring balance. It records a weight of 25 N. The bird (mass m = 0.5 kg) flies upward in the cage with an acceleration of 2 m/s2. The spring balance will now record a weight of

What is the mutual inductance of a two-loop system as shown with centre separation l

A ball of mass 150g starts moving with an acceleration of 20 m/s2. When hit by a force, which acts on it for 0.1 sec. The impulsive force is

Two conducting circular loops of radii R1 and R2 are placed in the same plane with their centres coinciding. If R1≫R2, the mutual inductance M between them will be directly proportional to

An unidentified gas X when heated, is found to radiate light of wavelengths 423 nm, 520 nm, and 640 nm. In another situation, after white light was passed through a cooled sample of gas X, certain wavelengths were found missing. The missing wavelengths could be -

Declination is the angle between:

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 by uniform retardation in further 40 s. What is the magnitude average velocity during this period?

The equation of a particle executing SHM is x=(5m)sin[(π s−1)t+π3]. What is its amplitude, time period, maximum speed and velocity. At t = 1s?

The following velocity-time graph depicts the motion of a vehicle. During what part of the motion was the vehicle experiencing zero acceleration?

What will be the reading of a d.c. ammeter in an a.c. circuit where the current flowing is 4A

__ is the S.I unit of time.

Two small spheres each having the charge + q are suspended by insulating threads of length L from a hook. This arrangement is taken in space where there is no gravitational effect, then the angle between the two suspensions and the tension in each will be

A block of mass m is dept on a horizontal table. If the static friction coefficient is μ Find the frictional force acting on the block.

The angle made by the string of a simple pendulum with the vertical depends on time as θ=π90 sin [(πs−1)t].Find the length of the pendulum if g = π2ms2.

If the radius of a sphere is measured as 9 cm with an error 0.03cm , then find the approximate error in calculating its volume.

A body of mass 'M' moving with a speed of 'u' has a head-on collision with a body of mass 'm' originally at rest. If M &gt;&gt; m, then the speed of the body of mass 'm' after the collision, will be nearly

The coefficient of linear expansion of an inhomogeneous rod changes linearly from α1 to α2 from one end to the other end of the rod. The effective coefficient of linear expansion of rod is

A point moves on x-axis according to x=4sin(πt), find the time when its speed becomes zero

An open pipe of length 100 cm is resonating with a tuning fork. To what depth the open pipe is to be immersed vertically in a trough of water, so that the pipe again resonates with the same tuning fork? (neglect end correction)

Find the derivative of functions cosx, cosecx, secx, cotx using first principle

A body of mass 'M' moving with a speed of 'u' has a head-on collision with a body of mass 'm' originally at rest. If M >> m, then the speed of the body of mass 'm' after the collision, will be nearly