13232 + Interview Questions in Physics Page 123 InterviewSolution

6101.	v=t^2+2t+5.Find out distance travelled by particle in first 10 sec.
Answer» v=t^2+2t+5.Find out distance travelled by particle in first 10 sec.

Discussion

6102.	if the time required by a planet to go round the sun is denoted by T and it's mean distance from the sun is denoted by D then T=D^n. Find n
Answer» if the time required by a planet to go round the sun is denoted by T and it's mean distance from the sun is denoted by D then T=D^n. Find n

Discussion

6103.	What is the rate of change of velocity called?
Answer» What is the rate of change of velocity called?

Discussion

6104.	1e The displacement s of a particle is proportional to the firstpower of time t, i.e., s o t; then the acceleration of theparticle is:(a) infinite(c) a small finite value(d) a large finite value(b) zero
Answer» 1e The displacement s of a particle is proportional to the firstpower of time t, i.e., s o t; then the acceleration of theparticle is:(a) infinite(c) a small finite value(d) a large finite value(b) zero

Discussion

6105.	A strong transverse pulse created at one end of a string is observed to complete 5 up and down journey along its length before fading out. The length of the string is 8m and the pulse takes 20 seconds to complete these journeys. What is the speed of the pulse through the string?
Answer» A strong transverse pulse created at one end of a string is observed to complete 5 up and down journey along its length before fading out. The length of the string is 8m and the pulse takes 20 seconds to complete these journeys. What is the speed of the pulse through the string?

Discussion

6106.	According to corpuscular theory of light, the different colours of light are due to
Answer» According to corpuscular theory of light, the different colours of light are due to

Discussion

6107.	Question 2Define the unit of current.
Answer» Question 2 Define the unit of current.

Discussion

6108.	The magnitude of gravitational force between the earth and 10 kg body is:
Answer» The magnitude of gravitational force between the earth and 10 kg body is:

Discussion

6109.	Which of the following can be used to see atoms?
Answer» Which of the following can be used to see atoms?

Discussion

6110.	Difference between resistance and resistivity
Answer» Difference between resistance and resistivity

Discussion

6111.	A 60 kg skydiver is moving at a terminal speed 40 m in 2 seconds. The skydiver is spending a power of ___ KW.
Answer» A 60 kg skydiver is moving at a terminal speed 40 m in 2 seconds. The skydiver is spending a power of ___ KW.

Discussion

6112.	A manometer tube contains mercury of density 13.6×103kgm−3. What difference in the levels of mercury in the two arms is indicated by a gauge pressure of 1.03×105 Pa
Answer» A manometer tube contains mercury of density $13.6 \times 10^{3} k g m^{- 3}$ . What difference in the levels of mercury in the two arms is indicated by a gauge pressure of $1.03 \times 10^{5}$ $P a$

Discussion

6113.	For the block diagrm shown in figure, the transfor function C(s)R(s) is equal to
Answer» For the block diagrm shown in figure, the transfor function $\frac{C (s)}{R (s)}$ is equal to

Discussion

6114.	If two masses m1 and m2 collide with each other. Before the collision, the velocities are u1 and u2 respectively. After the collision the velocities are V1 and V2. What is the final momentum after collision?
Answer» If two masses m₁ and m₂ collide with each other. Before the collision, the velocities are u₁ and u₂ respectively. After the collision the velocities are V₁ and V₂. What is the final momentum after collision?

Discussion

6115.	A man eats glucose and then he makes a block move, which then comes to rest after sliding on a rough floor. The correct order of energy changes can be:
Answer» A man eats glucose and then he makes a block move, which then comes to rest after sliding on a rough floor. The correct order of energy changes can be:

Discussion

6116.	Two sound sources of frequency 360 Hz each,one moving toward observer,while second moving away from observer with same speed 5.5 m/s,then number of beats produced per second is(v=330 m/s)
Answer» Two sound sources of frequency 360 Hz each,one moving toward observer,while second moving away from observer with same speed 5.5 m/s,then number of beats produced per second is(v=330 m/s)

Discussion

6117.	Question 2Gravitational force acts on all objects in proportion to their masses. Why then, a heavy object does not fall faster than a light object?
Answer» Question 2 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

6118.	83.The motion of a particle is described by the equation u=at. The distance travelled by the particle in first 4 seconds is A)4a B) 12a C)6a D)8a
Answer» 83.The motion of a particle is described by the equation u=at. The distance travelled by the particle in first 4 seconds is A)4a B) 12a C)6a D)8a

Discussion

6119.	A block of mass 50 kg moves on a rough horizontal surface with a coefficient of kinetic friction µ = 0.5. If the distance traveled is 20 m, how much work is done by the friction force? (take g = 10 m/s2)
Answer» A block of mass $50 k g$ moves on a rough horizontal surface with a coefficient of kinetic friction µ = 0.5. If the distance traveled is $20 m$ , how much work is done by the friction force? (take g = 10 $m / s^{2)}$

Discussion

6120.	What are the characteristics of longitudinal waves? Do particles travel from one place to another place? Is sound is a longitudinal wave?
Answer» What are the characteristics of longitudinal waves? Do particles travel from one place to another place? Is sound is a longitudinal wave?

Discussion

6121.	If action is equal to reaction then how horse can pull a cart ? Why don't the forces cancel each other ? Pls explain
Answer» If action is equal to reaction then how horse can pull a cart ? Why don't the forces cancel each other ? Pls explain

6121.

If action is equal to reaction then how horse can pull a cart ? Why don't the forces cancel each other ? Pls explain

Answer»

If action is equal to reaction then how horse can pull a cart ?

Why don't the forces cancel each other ?

Pls explain

Discussion

6122.	41. What are the conditions for G to be negative by considering Gibb’s Helmholtz equation?
Answer» 41. What are the conditions for G to be negative by considering Gibb’s Helmholtz equation?

Discussion

6123.	What can you say about motion of an object of it's speed - time graph is a straight line parallel to the time axis?
Answer» What can you say about motion of an object of it's speed - time graph is a straight line parallel to the time axis?

Discussion

6124.	134.A man who weighs 670 N runs the first 7.0 in 1.6 s, starting from rest and accelerating uniformly. What is the average power does the man generate during the 1.6 s time interval?
Answer» 134.A man who weighs 670 N runs the first 7.0 in 1.6 s, starting from rest and accelerating uniformly. What is the average power does the man generate during the 1.6 s time interval?

Discussion

6125.	Write the differences between light 💡 wave 🌊 and sound 🔊 wave 🌊 .
Answer» Write the differences between light 💡 wave 🌊 and sound 🔊 wave 🌊 .

Discussion

6126.	the change in potential energy when a body of mass m is raised to height nR from the earth's surface is (R is radius of earth)
Answer» the change in potential energy when a body of mass m is raised to height nR from the earth's surface is (R is radius of earth)

Discussion

6127.	When two sound waves meet eah other does waves destructively.
Answer» When two sound waves meet eah other does waves destructively.

Discussion

6128.	A coolie is moving on a road with a luggage on his head. Does he perform work against the force of gravity? Give reason for your answer.
Answer» A coolie is moving on a road with a luggage on his head. Does he perform work against the force of gravity? Give reason for your answer.

Discussion

6129.	Question 2A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is(a) -30 cm(b) -20 cm(c) -40 cm(d) -60 cm
Answer» Question 2 A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is (a) -30 cm (b) -20 cm (c) -40 cm (d) -60 cm

Discussion

6130.	A potentiometer consists of a wire of length200 cm and of resistance 5 ohm. It is connectedto a cell of emf 1 V having negligible internalresistance. The potential difference per unitlength of the wire, is(1) 1 V/m (2) 0.5 V/m(3) 2 V/m (4) 3 V/m
Answer» A potentiometer consists of a wire of length 200 cm and of resistance 5 ohm. It is connected to a cell of emf 1 V having negligible internal resistance. The potential difference per unit length of the wire, is (1) 1 V/m (2) 0.5 V/m (3) 2 V/m (4) 3 V/m

Discussion

6131.	The ‘Professor’ knew too much. How did he prove himself? Fill up the space with suitable examples from the story, using the given clues: (a) about muzzle velocity: ____________________________________________ ________________________________________________________________ (b) after a thirty mile walk: ____________________________________________ ________________________________________________________________ (c) his salute on payday: ____________________________________________ ________________________________________________________________ (d) the loud sound of a high flying invisible aeroplane: _______________________ _________________________________________________________________ (e) about hand grenades: _____________________________________________ ________________________________________________________________ (f) during cookhouse duties: _____________________________________________ ________________________________________________________________
Answer» The ‘Professor’ knew too much. How did he prove himself? Fill up the space with suitable examples from the story, using the given clues: (a) about muzzle velocity: ____________________________________________ ________________________________________________________________ (b) after a thirty mile walk: ____________________________________________ ________________________________________________________________ (c) his salute on payday: ____________________________________________ ________________________________________________________________ (d) the loud sound of a high flying invisible aeroplane: _______________________ _________________________________________________________________ (e) about hand grenades: _____________________________________________ ________________________________________________________________ (f) during cookhouse duties: _____________________________________________ ________________________________________________________________

6131.

The ‘Professor’ knew too much. How did he prove himself? Fill up the space with suitable examples from the story, using the given clues: (a) about muzzle velocity: (b) after a thirty mile walk: (c) his salute on payday: ________ (d) the loud sound of a high flying invisible aeroplane: _ _________________________________ (e) about hand grenades: _ ____________________ (f) during cookhouse duties: _ __________________________________________

Answer»

The
‘Professor’ knew too much. How did he prove himself? Fill
up the space with suitable examples from the story, using the given
clues:

(a) about muzzle velocity:
____________________________________________

________________________________________________________________

(b) after a thirty mile walk:
____________________________________________

________________________________________________________________

(c) his salute on payday:
____________________________________________

________________________________________________________________

(d) the loud sound of a high flying invisible aeroplane:
_______________________

_________________________________________________________________

(e) about hand grenades:
_____________________________________________

________________________________________________________________

(f) during cookhouse duties:
_____________________________________________

________________________________________________________________

Discussion

6132.	number of neutrons present in 8 g atoms of oxygen
Answer» number of neutrons present in 8 g atoms of oxygen

Discussion

6133.	What is the definition of 1 joule ? Please explain.
Answer» What is the definition of 1 joule ? Please explain.

Discussion

6134.	Find an expression for displacement of a uniformly accelerated body from its velocity time graph
Answer» Find an expression for displacement of a uniformly accelerated body from its velocity time graph

Discussion

6135.	We see the lightning flash before we can hear thunder because_______.
Answer» We see the lightning flash before we can hear thunder because_______.

Discussion

6136.	If the time period of a simple pendulum suspended at a place having g=9.8 m s−2 as the acceleration due to gravity is T, the effective length of the pendulum, l is given by:
Answer» If the time period of a simple pendulum suspended at a place having $g = 9.8 m s^{- 2}$ as the acceleration due to gravity is $T$ , the effective length of the pendulum, $l$ is given by:

Discussion

6137.	Select the correct relation(s) for pressure.
Answer» Select the correct relation(s) for pressure.

Discussion

6138.	A ballon filled with hydrogen gas rises upwards because
Answer» A ballon filled with hydrogen gas rises upwards because

Discussion

6139.	Two masses A and B having mass ma and mb respectively, lying in the plane of the fifure shown, are rigidly attached to a shaft which reloves about an axis through O perpedndicualr to the plane of the figure. The radii of rotation of the masses ma and mb are ra and rb, respectively. The angle between lines OA and OB is 90o. If ma=100kg, mb=20 kg,ra=200 mm and rb=400 mm, then the balance mass to be placed at a radius of 200 mm is kg(round off two decimal places)
Answer» Two masses A and B having mass $m_{a}$ and $m_{b}$ respectively, lying in the plane of the fifure shown, are rigidly attached to a shaft which reloves about an axis through O perpedndicualr to the plane of the figure. The radii of rotation of the masses $m_{a}$ and $m_{b}$ are $r_{a}$ and $r_{b}$ , respectively. The angle between lines OA and OB is $90^{o}$ . If $m_{a} = 100$ kg, $m_{b}$ =20 kg, $r_{a}$ =200 mm and $r_{b}$ =400 mm, then the balance mass to be placed at a radius of 200 mm is kg(round off two decimal places)

Discussion

6140.	The SI unit of amount of substance is___ .
Answer» The SI unit of amount of substance is___ .

Discussion

6141.	can a higher density body float on lower density liquid?
Answer» can a higher density body float on lower density liquid?

Discussion

6142.	Thrust acting on the bottom surface of a tank having dimensions 4 m × 4 m × 4 m when fully filled with water of density 103 kg m-3 is
Answer» Thrust acting on the bottom surface of a tank having dimensions 4 m × 4 m × 4 m when fully filled with water of density 10³ kg m^-3 is

Discussion

6143.	18. Wire 1 and 2 carrying currents i1 and i2 respectively are inclined at an angle theta to each other .What is the force on a small element dl of wire 2 at a distance r from wire 1 (as shown in figure )due to magnetic field of wire 1?
Answer» 18. Wire 1 and 2 carrying currents i1 and i2 respectively are inclined at an angle theta to each other .What is the force on a small element dl of wire 2 at a distance r from wire 1 (as shown in figure )due to magnetic field of wire 1?

Discussion

6144.	On what factor does the inertia of a body depend? Which has more inertia, a cricket ball or a rubber ball of the same size? When a tree is shaken, its fruits and leaves fall down. Why?
Answer» On what factor does the inertia of a body depend? Which has more inertia, a cricket ball or a rubber ball of the same size? When a tree is shaken, its fruits and leaves fall down. Why?

Discussion

6145.	One of Saturn's moon is named as Mimas. The orbital radius of Mimas is 1.87 × 108 m. The time taken to complete one revolution by Mimas around Saturn is approximately 23 hours. The speed of Mimas with which it revolves around Saturn is
Answer» One of Saturn's moon is named as Mimas. The orbital radius of Mimas is 1.87 $\times$ $10^{8}$ m. The time taken to complete one revolution by Mimas around Saturn is approximately 23 hours. The speed of Mimas with which it revolves around Saturn is

Discussion

6146.	Q1. For how long should a force of 100N at a body of mass 20 kg so,that it acquire the velocity of 100 m/s Q2. A 150 kg for travelling at 30m/s strikes the palm of wares and it stoped 0.06 sec calculate the body move straw a 12 m
Answer» Q1. For how long should a force of 100N at a body of mass 20 kg so,that it acquire the velocity of 100 m/s Q2. A 150 kg for travelling at 30m/s strikes the palm of wares and it stoped 0.06 sec calculate the body move straw a 12 m

Discussion

6147.	Question 20 The value of (256)0.16×(256)0.09 is A) 4 B) 16 C) 64 D) 256.25
Answer» Question 20 The value of $(256)^{0.16} \times (256)^{0.09}$ is A) 4 B) 16 C) 64 D) 256.25

Discussion

6148.	Mimas is one of Saturn's many moons.. The orbital distance of Mimas, from Saturn is 1.87 × 108 m. Its mean orbital period is approximately 23 hours. Calculate the speed with which it revolves around Saturn.
Answer» Mimas is one of Saturn's many moons.. The orbital distance of Mimas, from Saturn is 1.87 $\times$ $10^{8}$ m. Its mean orbital period is approximately 23 hours. Calculate the speed with which it revolves around Saturn.

Discussion

6149.	An electric circuit has a 30 V battery and a resistor of 90 ohm. Then, the current in the circuit will be:
Answer» An electric circuit has a 30 V battery and a resistor of 90 ohm. Then, the current in the circuit will be:

Discussion

6150.	An air bubble rises from bottom of a lake to surface.If its radius increases by 200% and atmospheric pressure is equal to water column of height H,then depth of lake is
Answer» An air bubble rises from bottom of a lake to surface.If its radius increases by 200% and atmospheric pressure is equal to water column of height H,then depth of lake is

Discussion

Explore topic-wise InterviewSolutions in .

v=t^2+2t+5.Find out distance travelled by particle in first 10 sec.

if the time required by a planet to go round the sun is denoted by T and it's mean distance from the sun is denoted by D then T=D^n. Find n

What is the rate of change of velocity called?

1e The displacement s of a particle is proportional to the firstpower of time t, i.e., s o t; then the acceleration of theparticle is:(a) infinite(c) a small finite value(d) a large finite value(b) zero

A strong transverse pulse created at one end of a string is observed to complete 5 up and down journey along its length before fading out. The length of the string is 8m and the pulse takes 20 seconds to complete these journeys. What is the speed of the pulse through the string?

According to corpuscular theory of light, the different colours of light are due to

Question 2Define the unit of current.

The magnitude of gravitational force between the earth and 10 kg body is:

Which of the following can be used to see atoms?

Difference between resistance and resistivity

A 60 kg skydiver is moving at a terminal speed 40 m in 2 seconds. The skydiver is spending a power of ___ KW.

A manometer tube contains mercury of density 13.6×103kgm−3. What difference in the levels of mercury in the two arms is indicated by a gauge pressure of 1.03×105 Pa

For the block diagrm shown in figure, the transfor function C(s)R(s) is equal to

If two masses m1 and m2 collide with each other. Before the collision, the velocities are u1 and u2 respectively. After the collision the velocities are V1 and V2. What is the final momentum after collision?

A man eats glucose and then he makes a block move, which then comes to rest after sliding on a rough floor. The correct order of energy changes can be:

Two sound sources of frequency 360 Hz each,one moving toward observer,while second moving away from observer with same speed 5.5 m/s,then number of beats produced per second is(v=330 m/s)

Question 2Gravitational force acts on all objects in proportion to their masses. Why then, a heavy object does not fall faster than a light object?

83.The motion of a particle is described by the equation u=at. The distance travelled by the particle in first 4 seconds is A)4a B) 12a C)6a D)8a

A block of mass 50 kg moves on a rough horizontal surface with a coefficient of kinetic friction µ = 0.5. If the distance traveled is 20 m, how much work is done by the friction force? (take g = 10 m/s2)

What are the characteristics of longitudinal waves? Do particles travel from one place to another place? Is sound is a longitudinal wave?

If action is equal to reaction then how horse can pull a cart ? Why don't the forces cancel each other ? Pls explain

41. What are the conditions for G to be negative by considering Gibb’s Helmholtz equation?

What can you say about motion of an object of it's speed - time graph is a straight line parallel to the time axis?

134.A man who weighs 670 N runs the first 7.0 in 1.6 s, starting from rest and accelerating uniformly. What is the average power does the man generate during the 1.6 s time interval?

Write the differences between light 💡 wave 🌊 and sound 🔊 wave 🌊 .

the change in potential energy when a body of mass m is raised to height nR from the earth's surface is (R is radius of earth)

When two sound waves meet eah other does waves destructively.

A coolie is moving on a road with a luggage on his head. Does he perform work against the force of gravity? Give reason for your answer.

Question 2A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is(a) -30 cm(b) -20 cm(c) -40 cm(d) -60 cm

A potentiometer consists of a wire of length200 cm and of resistance 5 ohm. It is connectedto a cell of emf 1 V having negligible internalresistance. The potential difference per unitlength of the wire, is(1) 1 V/m (2) 0.5 V/m(3) 2 V/m (4) 3 V/m

number of neutrons present in 8 g atoms of oxygen

What is the definition of 1 joule ? Please explain.

Find an expression for displacement of a uniformly accelerated body from its velocity time graph

We see the lightning flash before we can hear thunder because_______.

If the time period of a simple pendulum suspended at a place having g=9.8 m s−2 as the acceleration due to gravity is T, the effective length of the pendulum, l is given by:

Select the correct relation(s) for pressure.

A ballon filled with hydrogen gas rises upwards because

The SI unit of amount of substance is___ .

can a higher density body float on lower density liquid?

Thrust acting on the bottom surface of a tank having dimensions 4 m × 4 m × 4 m when fully filled with water of density 103 kg m-3 is

18. Wire 1 and 2 carrying currents i1 and i2 respectively are inclined at an angle theta to each other .What is the force on a small element dl of wire 2 at a distance r from wire 1 (as shown in figure )due to magnetic field of wire 1?

On what factor does the inertia of a body depend? Which has more inertia, a cricket ball or a rubber ball of the same size? When a tree is shaken, its fruits and leaves fall down. Why?

One of Saturn's moon is named as Mimas. The orbital radius of Mimas is 1.87 × 108 m. The time taken to complete one revolution by Mimas around Saturn is approximately 23 hours. The speed of Mimas with which it revolves around Saturn is

Q1. For how long should a force of 100N at a body of mass 20 kg so,that it acquire the velocity of 100 m/s Q2. A 150 kg for travelling at 30m/s strikes the palm of wares and it stoped 0.06 sec calculate the body move straw a 12 m

Question 20 The value of (256)0.16×(256)0.09 is A) 4 B) 16 C) 64 D) 256.25

Mimas is one of Saturn's many moons.. The orbital distance of Mimas, from Saturn is 1.87 × 108 m. Its mean orbital period is approximately 23 hours. Calculate the speed with which it revolves around Saturn.

An electric circuit has a 30 V battery and a resistor of 90 ohm. Then, the current in the circuit will be:

An air bubble rises from bottom of a lake to surface.If its radius increases by 200% and atmospheric pressure is equal to water column of height H,then depth of lake is