50278 + Interview Questions in Physics

1.	An aeroplane is flying with a uniform speed of 100 m/s along a circular path of radius 100 m. the angular speed of the aeroplane will be
Answer» An aeroplane is flying with a uniform speed of 100 m/s along a circular path of radius 100 m. the angular speed of the aeroplane will be

Discussion

2.	Match the order of magnitude of observations in p and q with their correct values in x and y. (p)3×108 (x) 8 (q)7×108 (y) 9
Answer» Match the order of magnitude of observations in p and q with their correct values in x and y. (p) $3 \times 10^{8}$ (x) 8 (q) $7 \times 10^{8}$ (y) 9

2.

Match the order of magnitude of observations in p and q with their correct values in x and y. (p)3×108 (x) 8 (q)7×108 (y) 9

Answer»

Match the order of magnitude of observations in p and q with their correct values in x and y.

(p) $3 \times 10^{8}$ (x) 8

(q) $7 \times 10^{8}$ (y) 9

Discussion

3.	An air bubble of diameter 4 mm rises steadily through a solution of density 1800 kg/m3 at the rate of 0.05 m/s. Neglecting density of air, the co-efficient of viscosity of the solution is [Take g=10 m/s2]
Answer» An air bubble of diameter $4 mm$ rises steadily through a solution of density $1800 {kg/m}^{3}$ at the rate of $0.05 m/s$ . Neglecting density of air, the co-efficient of viscosity of the solution is [Take $g = 10 {m/s}^{2}$ ]

Discussion

4.	Four identical planks each of length 'a' are arranged one above the other over a table as shown. Each projects a distance beyond the edge of the one that is below it. Maximum value for 'L' so that no block topples is
Answer» Four identical planks each of length 'a' are arranged one above the other over a table as shown. Each projects a distance beyond the edge of the one that is below it. Maximum value for 'L' so that no block topples is

4.

Four identical planks each of length 'a' are arranged one above the other over a table as shown. Each projects a distance beyond the edge of the one that is below it. Maximum value for 'L' so that no block topples is

Answer»

Four identical planks each of length 'a' are arranged one above the other over a table as shown. Each projects a distance beyond the edge of the one that is below it. Maximum value for 'L' so that no block topples is

Discussion

5.	A 50 kg man is running at a speed of 18 km h−1. If all the kinetic energy of the man can be used to increase the temperature of water from 200 C to 300 C, how much water can be heated with this energy ?
Answer» A 50 kg man is running at a speed of 18 km $h^{- 1}$ . If all the kinetic energy of the man can be used to increase the temperature of water from $20^{0}$ C to $30^{0}$ C, how much water can be heated with this energy ?

Discussion

6.	What is the meaning of electric charge
Answer» What is the meaning of electric charge

Discussion

7.	What is the minimum speed I need to cross the river which is flowing in the west direction at 3 Km/hr? Beware of the crocodiles.
Answer» What is the minimum speed I need to cross the river which is flowing in the west direction at 3 Km/hr? Beware of the crocodiles.

Discussion

8.	In a large cylindrical water tank there are two small holes Q and P on the wall at a depth of h1 from upper level of water and at a height of h2 from the lower end of the tank respectively as shown in the figure. Water coming out from both the holes strikes the ground at the same point. The ratio of h1 and h2 is:
Answer» In a large cylindrical water tank there are two small holes Q and P on the wall at a depth of h₁ from upper level of water and at a height of h₂ from the lower end of the tank respectively as shown in the figure. Water coming out from both the holes strikes the ground at the same point. The ratio of h₁ and h₂ is:

8.

In a large cylindrical water tank there are two small holes Q and P on the wall at a depth of h1 from upper level of water and at a height of h2 from the lower end of the tank respectively as shown in the figure. Water coming out from both the holes strikes the ground at the same point. The ratio of h1 and h2 is:

Answer»

In a large cylindrical water tank there are two small holes Q and P on the wall at a depth of h₁ from upper level of water and at a height of h₂ from the lower end of the tank respectively as shown in the figure. Water coming out from both the holes strikes the ground at the same point. The ratio of h₁ and h₂ is:

Discussion

9.	Distinguish between average speed and average velocity
Answer» Distinguish between average speed and average velocity

Discussion

10.	If the period of revolution of an artificial satellite just above the earth's surface is T and the density of earth is ρ, then ρT2 is
Answer» If the period of revolution of an artificial satellite just above the earth's surface is T and the density of earth is $ρ$ , then $ρ T^{2}$ is

Discussion

11.	A ball is dropped from a tower. In the last second of its motion it travels a distance of 15m. Find the height of the tower. (take g = 10 m/s)
Answer» A ball is dropped from a tower. In the last second of its motion it travels a distance of 15m. Find the height of the tower. (take g = 10 m/s)

Discussion

12.	If 32 g of O2 contains 6.022 ×1023 molecules at NTP then 32 g of S, under the same conditions, will contain,
Answer» If 32 g of $O_{2}$ contains 6.022 $\times 10^{23}$ molecules at NTP then 32 g of S, under the same conditions, will contain,

Discussion

13.	A car moving on a straight road covers one third of the distance with 20 km/hr and the rest with 60 km/hr. The average speed is
Answer» A car moving on a straight road covers one third of the distance with 20 km/hr and the rest with 60 km/hr. The average speed is

13.

A car moving on a straight road covers one third of the distance with 20 km/hr and the rest with 60 km/hr. The average speed is

Answer»

A car moving on a straight road covers one third of the distance with 20 km/hr and the rest with 60 km/hr. The average speed is

Discussion

14.	The focal length of an equi-convex lens in air is equal to either of its radii of curvature. The refractive index of the material of the lens is:
Answer» The focal length of an equi-convex lens in air is equal to either of its radii of curvature. The refractive index of the material of the lens is:

Discussion

15.	From a tower of height H, a particle is thrown vertically upward with a speed u. The time taken by the particle, to hit the ground, is n times that taken by it to reach the highest point of its path. The relation between H,u and n is
Answer» From a tower of height $H$ , a particle is thrown vertically upward with a speed $u$ . The time taken by the particle, to hit the ground, is $n$ times that taken by it to reach the highest point of its path. The relation between $H, u$ and $n$ is

Discussion

16.	The gas which obeys Boyle's law for maximum range of temperature is
Answer» The gas which obeys Boyle's law for maximum range of temperature is

Discussion

17.	A combination of two lenses with power 1D and 2D is there what is the total power
Answer» A combination of two lenses with power 1D and 2D is there what is the total power

Discussion

18.	A car is moving in a circular horizontal track of radius 10 m with a constant speed of 10 m/sec. A plumb bob is suspended from the roof of the car by a light rigid rod of length 1.00 m. The angle made by the rod with the vertical is
Answer» A car is moving in a circular horizontal track of radius 10 m with a constant speed of 10 m/sec. A plumb bob is suspended from the roof of the car by a light rigid rod of length 1.00 m. The angle made by the rod with the vertical is

Discussion

19.	A force F is applied horizontally to a block A of mass m1 which is in contact with a block B of mass m2, as shown in the figure. If the surfaces are frictionless, the force exerted by A on B is equal to
Answer» A force F is applied horizontally to a block A of mass $m_{1}$ which is in contact with a block B of mass $m_{2}$ , as shown in the figure. If the surfaces are frictionless, the force exerted by A on B is equal to

Discussion

20.	The distance and displacement respectively covered by a man on reaching point C from point A as shown in the figure is
Answer» The distance and displacement respectively covered by a man on reaching point $C$ from point $A$ as shown in the figure is

Discussion

21.	The de Broglie wavelength of an electron moving with a velocity 0f 1.5X108 m/s is equal to that of a photon. The ratio of kinetic energy of that electron to the photon is. [IIT JEE 2004]
Answer» The de Broglie wavelength of an electron moving with a velocity 0f $1.5 X 10^{8}$ m/s is equal to that of a photon. The ratio of kinetic energy of that electron to the photon is. [IIT JEE 2004]

Discussion

22.	If two waves of same frequency and same amplitude respectively, on superimposition produced a resultant disturbance of the same amplitude, the waves differ in phase by [MP PMT 1990; MP PET 2000]
Answer» If two waves of same frequency and same amplitude respectively, on superimposition produced a resultant disturbance of the same amplitude, the waves differ in phase by [MP PMT 1990; MP PET 2000]

22.

If two waves of same frequency and same amplitude respectively, on superimposition produced a resultant disturbance of the same amplitude, the waves differ in phase by [MP PMT 1990; MP PET 2000]

Answer»

If two waves of same frequency and same amplitude respectively, on superimposition produced a resultant disturbance of the same amplitude, the waves differ in phase by

[MP PMT 1990; MP PET 2000]

Discussion

23.	How is the frame of reference a factor affecting the work? What is its significance?
Answer» How is the frame of reference a factor affecting the work? What is its significance?

Discussion

24.	Give some applications of diodes
Answer» Give some applications of diodes

Discussion

25.	Dimensional formula of stress is same as that of
Answer» Dimensional formula of stress is same as that of

Discussion

26.	A large number of bullets are fired in all directions with same speed v. What is the maximum area on the ground on which these bullets will spread
Answer» A large number of bullets are fired in all directions with same speed v. What is the maximum area on the ground on which these bullets will spread

Discussion

27.	A bar magnet has a length of 8 cm. The magnetic field at a point at a distance 3 cm from the centre in the broadside-on position is found to be 4 ×10−6 T. Find the pole strength of the magnet.
Answer» A bar magnet has a length of 8 cm. The magnetic field at a point at a distance 3 cm from the centre in the broadside-on position is found to be 4 $\times 10^{- 6}$ T. Find the pole strength of the magnet.

Discussion

28.	A particle P is projected with velocity u1 at an angle of 30∘ with the horizontal. Another particle Q is thrown vertically upwards with velocity u2 from a point vertically below the highest point of path of P. The necessary condition for the two particles to collide at the highest point is
Answer» A particle P is projected with velocity $u_{1}$ at an angle of $30^{\circ}$ with the horizontal. Another particle Q is thrown vertically upwards with velocity $u_{2}$ from a point vertically below the highest point of path of P. The necessary condition for the two particles to collide at the highest point is

28.

A particle P is projected with velocity u1 at an angle of 30∘ with the horizontal. Another particle Q is thrown vertically upwards with velocity u2 from a point vertically below the highest point of path of P. The necessary condition for the two particles to collide at the highest point is

Answer»

A particle P is projected with velocity $u_{1}$ at an angle of $30^{\circ}$ with the horizontal. Another particle Q is thrown vertically upwards with velocity $u_{2}$ from a point vertically below the highest point of path of P. The necessary condition for the two particles to collide at the highest point is

Discussion

29.	How much work is done in decreasing the volume of a gas by 2.4×10−4 m3 at a constant pressure of 1×105 N/m2?
Answer» How much work is done in decreasing the volume of a gas by $2.4 \times 10^{- 4} m^{3}$ at a constant pressure of $1 \times 10^{5} N / m^{2}$ ?

Discussion

30.	A diver having a moment of inertia of 6.0 kg-m2 about an axis through its centre of mass rotates at an angular speed of 2 rad/s about this axis. If he folds his hands and feet to decrease the moment of inertia to 5.0 kg-m2, what will be the new angular speed ?
Answer» A diver having a moment of inertia of 6.0 ${kg-m}^{2}$ about an axis through its centre of mass rotates at an angular speed of 2 rad/s about this axis. If he folds his hands and feet to decrease the moment of inertia to 5.0 ${kg-m}^{2}$ , what will be the new angular speed ?

Discussion

31.	Torque =force ×r . Then Torque×force=0 . How do this possible???
Answer» Torque =force ×r . Then Torque×force=0 . How do this possible???

Discussion

32.	Two waves represented by y = a sin (wt − kx) and y = a cos (wt − kx) are superposed. The resultant wave will have an amplitude
Answer» Two waves represented by $y$ = $a s i n (w t - k x)$ and $y$ = $a c o s (w t - k x)$ are superposed. The resultant wave will have an amplitude

Discussion

33.	A block of mass 'm' and a pan of equal mass are connected by a string going over a smooth light pulley as shown in figure. Initially the system is at rest when a particle of mass m falls on the pan and sticks to it. If the particle strikes the pan with a speed 'v' find the speed with which the system moves just after the collision.
Answer» A block of mass 'm' and a pan of equal mass are connected by a string going over a smooth light pulley as shown in figure. Initially the system is at rest when a particle of mass m falls on the pan and sticks to it. If the particle strikes the pan with a speed 'v' find the speed with which the system moves just after the collision.

33.

A block of mass 'm' and a pan of equal mass are connected by a string going over a smooth light pulley as shown in figure. Initially the system is at rest when a particle of mass m falls on the pan and sticks to it. If the particle strikes the pan with a speed 'v' find the speed with which the system moves just after the collision.

Answer»

A block of mass 'm' and a pan of equal mass are connected by a string going over a smooth light pulley as shown in figure. Initially the system is at rest when a particle of mass m falls on the pan and sticks to it. If the particle strikes the pan with a speed 'v' find the speed with which the system moves just after the collision.

Discussion

34.	The weight of a body at the centre of the earth is
Answer» The weight of a body at the centre of the earth is

Discussion

35.	A bicycle is resting on its stand in the east-west direction and the rear wheel is rotated at an angular speed of 100 revolutions per minute. If the length of each spoke is 30.0 cm and the horizontal component of the earth's magnetic field is 2.0×10−5 T, find the emf induced between the axis and the outer end of a spoke. Neglect centripetal force acting on the free electrons of the spoke.
Answer» A bicycle is resting on its stand in the east-west direction and the rear wheel is rotated at an angular speed of 100 revolutions per minute. If the length of each spoke is 30.0 cm and the horizontal component of the earth's magnetic field is $2.0 \times 10^{- 5}$ T, find the emf induced between the axis and the outer end of a spoke. Neglect centripetal force acting on the free electrons of the spoke.

Discussion

36.	A fisherman hooks an old log of wood of weight 12N and volume 1000 cm3. He pulls the log half way out of water. The tension in the string at this instant is
Answer» A fisherman hooks an old log of wood of weight 12N and volume 1000 $c m^{3}$ . He pulls the log half way out of water. The tension in the string at this instant is

Discussion

37.	Two particles move parallel to the x−axis about the origin with the same amplitude A and angular frequency ω. At a certain instance they are found at a distance A3 from the origin on opposite sides but their velocities are in the same direction. What is the phase difference between the two?
Answer» Two particles move parallel to the $x -$ axis about the origin with the same amplitude $A$ and angular frequency $ω$ . At a certain instance they are found at a distance $\frac{A}{3}$ from the origin on opposite sides but their velocities are in the same direction. What is the phase difference between the two?

Discussion

38.	What is Ohms Law? What are its limitaions?
Answer» What is Ohms Law? What are its limitaions?

Discussion

39.	A conductor at 10∘C connected in the left gap of metre bridge gives balancing length 40 cm. When the conductor is at 60∘C, the balance point shifts by 5cm. The temperature coefficient of resistance of the material of the conductor is
Answer» A conductor at $10^{\circ}$ C connected in the left gap of metre bridge gives balancing length 40 cm. When the conductor is at $60^{\circ}$ C, the balance point shifts by 5cm. The temperature coefficient of resistance of the material of the conductor is

Discussion

40.	What do you understand by parametric shift of a line? How does a line shift when its (i) slope decreases (ii) its intercept increases?
Answer» What do you understand by parametric shift of a line? How does a line shift when its (i) slope decreases (ii) its intercept increases?

Discussion

41.	Two bodies A and B of equal masses are suspended from two separate springs of force constants k1 and k2 respectively. If the two bodies oscillate such that their maximum velocities are equal, the ratio of the amplitudes of oscillation of A and B will be
Answer» Two bodies A and B of equal masses are suspended from two separate springs of force constants $k_{1} a n d k_{2}$ respectively. If the two bodies oscillate such that their maximum velocities are equal, the ratio of the amplitudes of oscillation of A and B will be

Discussion

42.	A police van moving on a highway with a speed of 30kmh−1 fires a bullet at a thief’s car speeding away in the same direction with a speed of 192 kmh−1. If the muzzle speed of the bullet is 150 ms−1, with what speed does the bullet hit the thief's car? (Note: Obtainthat speed which is relevant for damaging the thief's car).
Answer» A police van moving on a highway with a speed of $30 k m h^{- 1}$ fires a bullet at a thief’s car speeding away in the same direction with a speed of $192 k m h^{- 1}$ . If the muzzle speed of the bullet is $150 m s^{- 1}$ , with what speed does the bullet hit the thief's car? (Note: Obtainthat speed which is relevant for damaging the thief's car).

Discussion

43.	The half-life of a radioactive substance is 30 minutes. The time (in minutes) taken between 40% decay and 85% decay of the same radioactive substance is
Answer» The half-life of a radioactive substance is $30$ minutes. The time (in minutes) taken between $40 %$ decay and $85 %$ decay of the same radioactive substance is

Discussion

44.	The image is inverted when:
Answer» The image is inverted when:

Discussion

45.	A copper sphere is suspended in an evacuated chamber maintained at 300 K. The sphere is maintained at a constant temperature of 500 K by heating it electrically. A total of 210 W of electric power is needed to do it. When the surface of the copper sphere is completely blackened, 700 W is needed to maintain the same temperature of the sphere. Calculate the emissivity of copper.
Answer» A copper sphere is suspended in an evacuated chamber maintained at 300 K. The sphere is maintained at a constant temperature of 500 K by heating it electrically. A total of 210 W of electric power is needed to do it. When the surface of the copper sphere is completely blackened, 700 W is needed to maintain the same temperature of the sphere. Calculate the emissivity of copper.

Discussion

46.	A ball moving with velocity 10 m/s in downward direction as shown in figure. After collision with fixed surface having coefficient of restitution e=0.5, it rebounds back with velocity v m/s. Find the value of v. (Neglect all external forces)
Answer» A ball moving with velocity $10 m / s$ in downward direction as shown in figure. After collision with fixed surface having coefficient of restitution $e = 0.5$ , it rebounds back with velocity $v m/s$ . Find the value of $v$ . (Neglect all external forces)

Discussion

47.	A simple pendulum is made of a body which is a hollow sphere containing mercury suspended by means of a wire. If a little mercury is drained off, the period of pendulum will ]
Answer» A simple pendulum is made of a body which is a hollow sphere containing mercury suspended by means of a wire. If a little mercury is drained off, the period of pendulum will ]

47.

A simple pendulum is made of a body which is a hollow sphere containing mercury suspended by means of a wire. If a little mercury is drained off, the period of pendulum will ]

Answer»

A simple pendulum is made of a body which is a hollow sphere containing mercury suspended by means of a wire. If a little mercury is drained off, the period of pendulum will

]

Discussion

48.	Two identical metallic blocks resting on a frictionless horizontal surface are connected by a light metallic spring having the spring constant 100 N/m and an unstretched length of 0.2 m, as shown in figure 1. A total charge Q is slowly placed on the system, causing the spring to stretch to an equilibrium length of 0.3 m, as shown in figure 2. The value of charge Q, assuming that all the charge resides on the blocks and that the blocks are like point charges , is
Answer» Two identical metallic blocks resting on a frictionless horizontal surface are connected by a light metallic spring having the spring constant $100 N/m$ and an unstretched length of $0.2 m$ , as shown in figure 1. A total charge $Q$ is slowly placed on the system, causing the spring to stretch to an equilibrium length of $0.3 m$ , as shown in figure 2. The value of charge $Q$ , assuming that all the charge resides on the blocks and that the blocks are like point charges , is

Discussion

49.	Photon and electron are given same energy (10−20J) . Wavelength associated with photon and electron are λphandλel then correct statement will be
Answer» Photon and electron are given same energy $(10^{- 20} J)$ . Wavelength associated with photon and electron are $λ_{p h} a n d λ_{e l}$ then correct statement will be

Discussion

50.	Two waves are given by y1=asin (ωt−kx) and y2=acos (ωt−kx) The phase difference between the two waves is [MP PMT 1993; SCRA 1996; CET 1998;EAMCET 1991; Orissa JEE 2002]
Answer» Two waves are given by $y_{1} = a s i n (ω t - k x)$ and $y_{2} = a c o s (ω t - k x)$ The phase difference between the two waves is [MP PMT 1993; SCRA 1996; CET 1998;EAMCET 1991; Orissa JEE 2002]

50.

Two waves are given by y1=asin (ωt−kx) and y2=acos (ωt−kx) The phase difference between the two waves is [MP PMT 1993; SCRA 1996; CET 1998;EAMCET 1991; Orissa JEE 2002]

Answer»

Two waves are given by $y_{1} = a s i n (ω t - k x)$ and $y_{2} = a c o s (ω t - k x)$ The phase difference between the two waves is

[MP PMT 1993; SCRA 1996; CET 1998;EAMCET 1991; Orissa JEE 2002]

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

An aeroplane is flying with a uniform speed of 100 m/s along a circular path of radius 100 m. the angular speed of the aeroplane will be

Match the order of magnitude of observations in p and q with their correct values in x and y. (p)3×108 (x) 8 (q)7×108 (y) 9

An air bubble of diameter 4 mm rises steadily through a solution of density 1800 kg/m3 at the rate of 0.05 m/s. Neglecting density of air, the co-efficient of viscosity of the solution is [Take g=10 m/s2]

Four identical planks each of length 'a' are arranged one above the other over a table as shown. Each projects a distance beyond the edge of the one that is below it. Maximum value for 'L' so that no block topples is

A 50 kg man is running at a speed of 18 km h−1. If all the kinetic energy of the man can be used to increase the temperature of water from 200 C to 300 C, how much water can be heated with this energy ?

What is the meaning of electric charge

What is the minimum speed I need to cross the river which is flowing in the west direction at 3 Km/hr? Beware of the crocodiles.

Distinguish between average speed and average velocity

If the period of revolution of an artificial satellite just above the earth's surface is T and the density of earth is ρ, then ρT2 is

A ball is dropped from a tower. In the last second of its motion it travels a distance of 15m. Find the height of the tower. (take g = 10 m/s)

If 32 g of O2 contains 6.022 ×1023 molecules at NTP then 32 g of S, under the same conditions, will contain,

A car moving on a straight road covers one third of the distance with 20 km/hr and the rest with 60 km/hr. The average speed is

The focal length of an equi-convex lens in air is equal to either of its radii of curvature. The refractive index of the material of the lens is:

From a tower of height H, a particle is thrown vertically upward with a speed u. The time taken by the particle, to hit the ground, is n times that taken by it to reach the highest point of its path. The relation between H,u and n is

The gas which obeys Boyle's law for maximum range of temperature is

A combination of two lenses with power 1D and 2D is there what is the total power

A car is moving in a circular horizontal track of radius 10 m with a constant speed of 10 m/sec. A plumb bob is suspended from the roof of the car by a light rigid rod of length 1.00 m. The angle made by the rod with the vertical is

A force F is applied horizontally to a block A of mass m1 which is in contact with a block B of mass m2, as shown in the figure. If the surfaces are frictionless, the force exerted by A on B is equal to

The distance and displacement respectively covered by a man on reaching point C from point A as shown in the figure is

The de Broglie wavelength of an electron moving with a velocity 0f 1.5X108 m/s is equal to that of a photon. The ratio of kinetic energy of that electron to the photon is. [IIT JEE 2004]

If two waves of same frequency and same amplitude respectively, on superimposition produced a resultant disturbance of the same amplitude, the waves differ in phase by [MP PMT 1990; MP PET 2000]

How is the frame of reference a factor affecting the work? What is its significance?

Give some applications of diodes

Dimensional formula of stress is same as that of

A large number of bullets are fired in all directions with same speed v. What is the maximum area on the ground on which these bullets will spread

A bar magnet has a length of 8 cm. The magnetic field at a point at a distance 3 cm from the centre in the broadside-on position is found to be 4 ×10−6 T. Find the pole strength of the magnet.

A particle P is projected with velocity u1 at an angle of 30∘ with the horizontal. Another particle Q is thrown vertically upwards with velocity u2 from a point vertically below the highest point of path of P. The necessary condition for the two particles to collide at the highest point is

How much work is done in decreasing the volume of a gas by 2.4×10−4 m3 at a constant pressure of 1×105 N/m2?

A diver having a moment of inertia of 6.0 kg-m2 about an axis through its centre of mass rotates at an angular speed of 2 rad/s about this axis. If he folds his hands and feet to decrease the moment of inertia to 5.0 kg-m2, what will be the new angular speed ?

Torque =force ×r . Then Torque×force=0 . How do this possible???

Two waves represented by y = a sin (wt − kx) and y = a cos (wt − kx) are superposed. The resultant wave will have an amplitude

The weight of a body at the centre of the earth is

A fisherman hooks an old log of wood of weight 12N and volume 1000 cm3. He pulls the log half way out of water. The tension in the string at this instant is

Two particles move parallel to the x−axis about the origin with the same amplitude A and angular frequency ω. At a certain instance they are found at a distance A3 from the origin on opposite sides but their velocities are in the same direction. What is the phase difference between the two?

What is Ohms Law? What are its limitaions?

A conductor at 10∘C connected in the left gap of metre bridge gives balancing length 40 cm. When the conductor is at 60∘C, the balance point shifts by 5cm. The temperature coefficient of resistance of the material of the conductor is

What do you understand by parametric shift of a line? How does a line shift when its (i) slope decreases (ii) its intercept increases?

Two bodies A and B of equal masses are suspended from two separate springs of force constants k1 and k2 respectively. If the two bodies oscillate such that their maximum velocities are equal, the ratio of the amplitudes of oscillation of A and B will be

The half-life of a radioactive substance is 30 minutes. The time (in minutes) taken between 40% decay and 85% decay of the same radioactive substance is

The image is inverted when:

A ball moving with velocity 10 m/s in downward direction as shown in figure. After collision with fixed surface having coefficient of restitution e=0.5, it rebounds back with velocity v m/s. Find the value of v. (Neglect all external forces)

A simple pendulum is made of a body which is a hollow sphere containing mercury suspended by means of a wire. If a little mercury is drained off, the period of pendulum will ]

Photon and electron are given same energy (10−20J) . Wavelength associated with photon and electron are λphandλel then correct statement will be

Two waves are given by y1=asin (ωt−kx) and y2=acos (ωt−kx) The phase difference between the two waves is [MP PMT 1993; SCRA 1996; CET 1998;EAMCET 1991; Orissa JEE 2002]