13232 + Interview Questions in Physics Page 127 InterviewSolution

6301.	Gravitational force acts on all objects in proportion to their masses. Why then, a heavy object does not fall faster than a light object?
Answer» Gravitational force acts on all objects in proportion to their masses. Why then, a heavy object does not fall faster than a light object?

Discussion

6302.	what will be the gravitational field intensity at a distance x from one end of a thin rod of mass M and length L
Answer» what will be the gravitational field intensity at a distance x from one end of a thin rod of mass M and length L

Discussion

6303.	What is the value of acceleration due to gravity
Answer» What is the value of acceleration due to gravity

Discussion

6304.	68. Express the centesimal measure 500g as circle measure
Answer» 68. Express the centesimal measure 500g as circle measure

Discussion

6305.	The focal length of a concave mirror is 50 cm. Where should the object be placed so that the size of the image is two times the size of the object and inverted?
Answer» The focal length of a concave mirror is $50 cm$ . Where should the object be placed so that the size of the image is two times the size of the object and inverted?

Discussion

6306.	To produce a magnetic field of pi tesla at the centre of circular loop of diameter 1m, the current flowing through loop is ?
Answer» To produce a magnetic field of pi tesla at the centre of circular loop of diameter 1m, the current flowing through loop is ?

Discussion

6307.	A body of mass 10 kg is moving with velocity 4 ms−1. The kinetic energy and momentum of the body is:
Answer» A body of mass 10 kg is moving with velocity 4 $m s^{- 1}$ . The kinetic energy and momentum of the body is:

Discussion

6308.	A uniform chain of length L and mass M lying on a smooth table and one third of its length is hanging vertically down over the edge of table . if g is acceleration due to gravity,the minimum work required to pull the hanging part of the chain on the table is
Answer» A uniform chain of length L and mass M lying on a smooth table and one third of its length is hanging vertically down over the edge of table . if g is acceleration due to gravity,the minimum work required to pull the hanging part of the chain on the table is

Discussion

6309.	A ball of thermal capacity 10 cal/∘C is heated to the temperature of furnace. It is then transferred into a vessel containing water. The water equivalent of vessel and the contents is 200 gm. The temperature of the vessel and its contents rises from 10∘C to 40∘C. What is the temperature of furnace?
Answer» A ball of thermal capacity $10 cal /^{\circ} C$ is heated to the temperature of furnace. It is then transferred into a vessel containing water. The water equivalent of vessel and the contents is $200 gm$ . The temperature of the vessel and its contents rises from $10^{\circ} C$ to $40^{\circ} C$ . What is the temperature of furnace?

Discussion

6310.	Question 11The power generated in a windmill(a) is more in rainy season since damp air would mean more air mass hitting the blades(b) depends on the height of the tower(c) depends on wind velocity(d) can be increased by planting tall trees close to the tower
Answer» Question 11 The power generated in a windmill (a) is more in rainy season since damp air would mean more air mass hitting the blades (b) depends on the height of the tower (c) depends on wind velocity (d) can be increased by planting tall trees close to the tower

Discussion

6311.	Give me clarifying note on the discharge tube experiment of Goldstein who discovered proton?
Answer» Give me clarifying note on the discharge tube experiment of Goldstein who discovered proton?

Discussion

6312.	When we apply force on the floor
Answer» When we apply force on the floor

Discussion

6313.	two bodiws having masses x and y are separated by a dis†an ce n , then the gravitational force between them will be
Answer» two bodiws having masses x and y are separated by a dis†an ce n , then the gravitational force between them will be

Discussion

6314.	39.If Y1=5çoswt and Y2=5[3coswt+sinwt] FIND the ratio of the amplitude of the two waves
Answer» 39.If Y1=5çoswt and Y2=5[3coswt+sinwt] FIND the ratio of the amplitude of the two waves

Discussion

6315.	A car is moving with a velocity 20 m s−1.The brakes are applied to retard it at a rate of 2 m s−2.What will be the velocity after 5 s of applying the brakes ?
Answer» A car is moving with a velocity $20 m s^{- 1}$ .The brakes are applied to retard it at a rate of $2 m s^{- 2}$ .What will be the velocity after 5 s of applying the brakes ?

Discussion

6316.	A stone dropped from the top of a tower of height 300 m splashes into a pond of water at its base. When will the sound of the splash be heard at the top ?( Take velocity of sound = 340 ms−1 and acceleration due to gravity, g=9.8 ms−2)
Answer» A stone dropped from the top of a tower of height $300 m$ splashes into a pond of water at its base. When will the sound of the splash be heard at the top ? ( Take velocity of sound = $340 m s^{- 1}$ and acceleration due to gravity, $g = 9.8 m s^{- 2}$ )

Discussion

6317.	A bus starts from the stop and take 50 second to get the speed of 10m/s. If the mass of the bus along with passengers is 10000 kg, calculate the force applied (in N) by the engine of bus to push the bus to the speed of 10m/s? ___
Answer» A bus starts from the stop and take 50 second to get the speed of 10m/s. If the mass of the bus along with passengers is 10000 kg, calculate the force applied (in N) by the engine of bus to push the bus to the speed of 10m/s? ___

Discussion

6318.	If v1 and v2 are the speeds of light in medium 1 and 2, respectively then, according to Snell’s law,sin isin r is equal to .
Answer» If $v_{1}$ and $v_{2}$ are the speeds of light in medium 1 and 2, respectively then, according to Snell’s law, $\frac{s i n i}{s i n r}$ is equal to .

Discussion

6319.	Q. A scooter is going due east at 10 m/s turns right through an angle of 90 degrees. If the speed of scooter remains unchanged in taking turn then find the change in velocity of scooter .
Answer» Q. A scooter is going due east at 10 m/s turns right through an angle of 90 degrees. If the speed of scooter remains unchanged in taking turn then find the change in velocity of scooter .

Discussion

6320.	Question 9What is the momentum of an object of mass m, moving with a velocity v?(a) (mv)2(b) mv2(c) 12mv2(d) mv
Answer» Question 9 What is the momentum of an object of mass m, moving with a velocity v? (a) $(m v)^{2}$ (b) $m v^{2}$ (c) $\frac{1}{2} m v^{2}$ (d) mv

Discussion

6321.	The action and reaction both act simultaneously. Is this statement true?
Answer» The action and reaction both act simultaneously. Is this statement true?

Discussion

6322.	What are electromagnetic waves?
Answer» What are electromagnetic waves?

Discussion

6323.	a spring of force cons†an t 600 nm is mounted on a horizontal table.a mass of 1.5 kg is attached to the free end f the sspring pulled sidewaysb to a dis†an ce of 2 cm and released the speed of the mass when the spring is compressed by 1 cm i
Answer» a spring of force cons†an t 600 nm is mounted on a horizontal table.a mass of 1.5 kg is attached to the free end f the sspring pulled sidewaysb to a dis†an ce of 2 cm and released the speed of the mass when the spring is compressed by 1 cm i

Discussion

6324.	A body is thrown horizontally from the top of a tower of height 5m If touches the ground at a dis†an ce of 10 m from the foot of the tower .The initial velocity of the body is g=10m/s^2
Answer» A body is thrown horizontally from the top of a tower of height 5m If touches the ground at a dis†an ce of 10 m from the foot of the tower .The initial velocity of the body is g=10m/s^2

Discussion

6325.	4.Why does the speed of light changes as change in medium
Answer» 4.Why does the speed of light changes as change in medium

Discussion

6326.	A particle performs SHM with a period T and amplitude a. The mean velocity of the particle over the time interval during which it travels a distance a/2 from the extreme position is
Answer» A particle performs SHM with a period $T$ and amplitude $a$ . The mean velocity of the particle over the time interval during which it travels a distance $a / 2$ from the extreme position is

Discussion

6327.	A toy car accelerates from rest at 2 ms−2 for 3 seconds. Afterwards the car begins to slow down. It travels a combined total of 27 metres before coming to rest. What is its rate of retardation and what is the total time of the motion?
Answer» A toy car accelerates from rest at $2 m s^{- 2}$ for $3 s e c o n d s$ . Afterwards the car begins to slow down. It travels a combined total of $27 m e t r e s$ before coming to rest. What is its rate of retardation and what is the total time of the motion?

Discussion

6328.	difference between speed and velocity and acceleration?
Answer» difference between speed and velocity and acceleration?

Discussion

6329.	A torque of 15 Nm is applied on a body for 1/3 second . The magnitude of change in angular momentum will be
Answer» A torque of 15 Nm is applied on a body for 1/3 second . The magnitude of change in angular momentum will be

Discussion

6330.	95.The bob of simple pendulum having length /, is displaced from mean position to an angular position with respect to vertical. If it is released, then velocity of bob at equilibrium position Options: Should have chosen
Answer» 95.The bob of simple pendulum having length /, is displaced from mean position to an angular position with respect to vertical. If it is released, then velocity of bob at equilibrium position Options: Should have chosen

Discussion

6331.	Question 7On what basis would you classify energy sources as(a) renewable and non-renewable?(b) exhaustible and inexhaustible?Are the options given in (a) and (b) the same?
Answer» Question 7 On what basis would you classify energy sources as (a) renewable and non-renewable? (b) exhaustible and inexhaustible? Are the options given in (a) and (b) the same?

Discussion

6332.	134.IF THE BOB IS A HOLLOW SPHERE FULL OF WATER AND WATER COMES OUT SLOWLY THROUGH A HOLEAT THE BOTTOM
Answer» 134.IF THE BOB IS A HOLLOW SPHERE FULL OF WATER AND WATER COMES OUT SLOWLY THROUGH A HOLEAT THE BOTTOM

Discussion

6333.	Arun is swimming in a swimming pool. Whether work is done or not?
Answer» Arun is swimming in a swimming pool. Whether work is done or not?

Discussion

6334.	What kind of energy transformation takes place when a toy is dropped from certain height?
Answer» What kind of energy transformation takes place when a toy is dropped from certain height?

Discussion

6335.	A car is moving at a rate of 18 km/h. When the brakes were applied it comes to rest in a distance of 100m. Calculate the retardation produced by the brakes
Answer» A car is moving at a rate of 18 km/h. When the brakes were applied it comes to rest in a distance of 100m. Calculate the retardation produced by the brakes

Discussion

6336.	A flywheel of mass 25 kg has a radius of 0.2m.It is making 240 rpm.What is the torque required to bring it to rest in 20s?If the torque is due to a force applied †an gentially on the rim of the flywheel,what is the force
Answer» A flywheel of mass 25 kg has a radius of 0.2m.It is making 240 rpm.What is the torque required to bring it to rest in 20s?If the torque is due to a force applied †an gentially on the rim of the flywheel,what is the force

Discussion

6337.	15.How to take a reading on vernier calliper and screw gauge
Answer» 15.How to take a reading on vernier calliper and screw gauge

Discussion

6338.	103.Figure shows a conductor of length l having a circular cross section.the radius of cross section varies linearly from a to b.the resistivity of the material is rho. Assuming that b-a
Answer» 103.Figure shows a conductor of length l having a circular cross section.the radius of cross section varies linearly from a to b.the resistivity of the material is rho. Assuming that b-a

Discussion

6339.	A particle is moving along a circle such that it completes one revolution in 40 sec. In 2 minutes 20 sec, the ratio is(1)1/7(2)1/11(3)1/9(4)1/5
Answer» A particle is moving along a circle such that it completes one revolution in 40 sec. In 2 minutes 20 sec, the ratio is (1)1/7 (2)1/11 (3)1/9 (4)1/5

Discussion

6340.	A celestial body that orbits a planet or other celestial body is called
Answer» A celestial body that orbits a planet or other celestial body is called

Discussion

6341.	The law of conservation of momentum holds for:
Answer» The law of conservation of momentum holds for:

Discussion

6342.	What is cross conjugation and how does it occur and why does it occur?
Answer» What is cross conjugation and how does it occur and why does it occur?

Discussion

6343.	Two friends, Sam and John, each having weight of 40 kg, go for rock climbing. Sam climbs to a height of 3 m in 10 s and John covers the same height in 12s. a. Is the work done by Sam and John equal? Why? b. Who has more power? Why? c. Calculate the power of Sam and John.
Answer» Two friends, Sam and John, each having weight of 40 kg, go for rock climbing. Sam climbs to a height of 3 m in 10 s and John covers the same height in 12s. a. Is the work done by Sam and John equal? Why? b. Who has more power? Why? c. Calculate the power of Sam and John.

Discussion

6344.	The direction of the deflection of a magnetic needle is given by
Answer» The direction of the deflection of a magnetic needle is given by

Discussion

6345.	A capacitor of capacitance 6 uF is connected with an emf source 3 V. Electrostatic energy stored in thecapacitor is
Answer» A capacitor of capacitance 6 uF is connected with an emf source 3 V. Electrostatic energy stored in thecapacitor is

Discussion

6346.	What should be the minimum distance between the source and reflector in water so that the echo is heard distinctly? (The speed of sound in water = 1400 m s−1).
Answer» What should be the minimum distance between the source and reflector in water so that the echo is heard distinctly? (The speed of sound in water = 1400 m $s^{- 1}$ ).

Discussion

6347.	28.The equation of the wave is a) Wavelength frequency and wave velocity b)The particle velocity and acceleration at x=.5m and t=.05s
Answer» 28.The equation of the wave is a) Wavelength frequency and wave velocity b)The particle velocity and acceleration at x=.5m and t=.05s

Discussion

6348.	A coolie was standing with 2 suitcases on his head and 2 bags in his hand. The luggage exerted a force of 159 N on him. What is the amount of work done by him?
Answer» A coolie was standing with 2 suitcases on his head and 2 bags in his hand. The luggage exerted a force of 159 N on him. What is the amount of work done by him?

Discussion

6349.	Assertion : The work done in bringing a body down from the top to the base along a frictionless inclined plane is same as the work done in bringing it down the vertical side. Reason :The gravitation force on the body along the inclined plane is the same as that along the vertical side
Answer» Assertion : The work done in bringing a body down from the top to the base along a frictionless inclined plane is same as the work done in bringing it down the vertical side. Reason :The gravitation force on the body along the inclined plane is the same as that along the vertical side

Discussion

6350.	Which of the following blocks will move rightward?
Answer» Which of the following blocks will move rightward?

Discussion

Explore topic-wise InterviewSolutions in .

Gravitational force acts on all objects in proportion to their masses. Why then, a heavy object does not fall faster than a light object?

what will be the gravitational field intensity at a distance x from one end of a thin rod of mass M and length L

What is the value of acceleration due to gravity

68. Express the centesimal measure 500g as circle measure

The focal length of a concave mirror is 50 cm. Where should the object be placed so that the size of the image is two times the size of the object and inverted?

To produce a magnetic field of pi tesla at the centre of circular loop of diameter 1m, the current flowing through loop is ?

A body of mass 10 kg is moving with velocity 4 ms−1. The kinetic energy and momentum of the body is:

A uniform chain of length L and mass M lying on a smooth table and one third of its length is hanging vertically down over the edge of table . if g is acceleration due to gravity,the minimum work required to pull the hanging part of the chain on the table is

Question 11The power generated in a windmill(a) is more in rainy season since damp air would mean more air mass hitting the blades(b) depends on the height of the tower(c) depends on wind velocity(d) can be increased by planting tall trees close to the tower

Give me clarifying note on the discharge tube experiment of Goldstein who discovered proton?

When we apply force on the floor

two bodiws having masses x and y are separated by a dis†an ce n , then the gravitational force between them will be

39.If Y1=5çoswt and Y2=5[3coswt+sinwt] FIND the ratio of the amplitude of the two waves

A car is moving with a velocity 20 m s−1.The brakes are applied to retard it at a rate of 2 m s−2.What will be the velocity after 5 s of applying the brakes ?

A stone dropped from the top of a tower of height 300 m splashes into a pond of water at its base. When will the sound of the splash be heard at the top ?( Take velocity of sound = 340 ms−1 and acceleration due to gravity, g=9.8 ms−2)

A bus starts from the stop and take 50 second to get the speed of 10m/s. If the mass of the bus along with passengers is 10000 kg, calculate the force applied (in N) by the engine of bus to push the bus to the speed of 10m/s? ___

If v1 and v2 are the speeds of light in medium 1 and 2, respectively then, according to Snell’s law,sin isin r is equal to .

Q. A scooter is going due east at 10 m/s turns right through an angle of 90 degrees. If the speed of scooter remains unchanged in taking turn then find the change in velocity of scooter .

Question 9What is the momentum of an object of mass m, moving with a velocity v?(a) (mv)2(b) mv2(c) 12mv2(d) mv

The action and reaction both act simultaneously. Is this statement true?

What are electromagnetic waves?

a spring of force cons†an t 600 nm is mounted on a horizontal table.a mass of 1.5 kg is attached to the free end f the sspring pulled sidewaysb to a dis†an ce of 2 cm and released the speed of the mass when the spring is compressed by 1 cm i

A body is thrown horizontally from the top of a tower of height 5m If touches the ground at a dis†an ce of 10 m from the foot of the tower .The initial velocity of the body is g=10m/s^2

4.Why does the speed of light changes as change in medium

A particle performs SHM with a period T and amplitude a. The mean velocity of the particle over the time interval during which it travels a distance a/2 from the extreme position is

A toy car accelerates from rest at 2 ms−2 for 3 seconds. Afterwards the car begins to slow down. It travels a combined total of 27 metres before coming to rest. What is its rate of retardation and what is the total time of the motion?

difference between speed and velocity and acceleration?

A torque of 15 Nm is applied on a body for 1/3 second . The magnitude of change in angular momentum will be

95.The bob of simple pendulum having length /, is displaced from mean position to an angular position with respect to vertical. If it is released, then velocity of bob at equilibrium position Options: Should have chosen

Question 7On what basis would you classify energy sources as(a) renewable and non-renewable?(b) exhaustible and inexhaustible?Are the options given in (a) and (b) the same?

134.IF THE BOB IS A HOLLOW SPHERE FULL OF WATER AND WATER COMES OUT SLOWLY THROUGH A HOLEAT THE BOTTOM

Arun is swimming in a swimming pool. Whether work is done or not?

What kind of energy transformation takes place when a toy is dropped from certain height?

A car is moving at a rate of 18 km/h. When the brakes were applied it comes to rest in a distance of 100m. Calculate the retardation produced by the brakes

A flywheel of mass 25 kg has a radius of 0.2m.It is making 240 rpm.What is the torque required to bring it to rest in 20s?If the torque is due to a force applied †an gentially on the rim of the flywheel,what is the force

15.How to take a reading on vernier calliper and screw gauge

103.Figure shows a conductor of length l having a circular cross section.the radius of cross section varies linearly from a to b.the resistivity of the material is rho. Assuming that b-a

A particle is moving along a circle such that it completes one revolution in 40 sec. In 2 minutes 20 sec, the ratio is(1)1/7(2)1/11(3)1/9(4)1/5

A celestial body that orbits a planet or other celestial body is called

The law of conservation of momentum holds for:

What is cross conjugation and how does it occur and why does it occur?

Two friends, Sam and John, each having weight of 40 kg, go for rock climbing. Sam climbs to a height of 3 m in 10 s and John covers the same height in 12s. a. Is the work done by Sam and John equal? Why? b. Who has more power? Why? c. Calculate the power of Sam and John.

The direction of the deflection of a magnetic needle is given by

A capacitor of capacitance 6 uF is connected with an emf source 3 V. Electrostatic energy stored in thecapacitor is

What should be the minimum distance between the source and reflector in water so that the echo is heard distinctly? (The speed of sound in water = 1400 m s−1).

28.The equation of the wave is a) Wavelength frequency and wave velocity b)The particle velocity and acceleration at x=.5m and t=.05s

A coolie was standing with 2 suitcases on his head and 2 bags in his hand. The luggage exerted a force of 159 N on him. What is the amount of work done by him?

Assertion : The work done in bringing a body down from the top to the base along a frictionless inclined plane is same as the work done in bringing it down the vertical side. Reason :The gravitation force on the body along the inclined plane is the same as that along the vertical side

Which of the following blocks will move rightward?