13232 + Interview Questions in Physics Page 100 InterviewSolution

4951.	Define watt. Express kilowatt in terms of joule per second. A 150 kg car engine develops 500 W for each kg. What force does it exert in moving the car at a speed of 20 ms−1?
Answer» Define watt. Express kilowatt in terms of joule per second. A 150 kg car engine develops 500 W for each kg. What force does it exert in moving the car at a speed of $20 m s^{- 1}$ ?

Discussion

4952.	Bicycle slows down when we stop pedaling. Because-
Answer» Bicycle slows down when we stop pedaling. Because-

Discussion

4953.	A 1000 kg vehicle moving with a velocity of 20 m/s is brought to rest in a distance of 50 m. Find the acceleration. Calculate the unbalanced force acting on the vehicle
Answer» A 1000 kg vehicle moving with a velocity of 20 m/s is brought to rest in a distance of 50 m. Find the acceleration. Calculate the unbalanced force acting on the vehicle

Discussion

4954.	A cell converts one form of energy into another form. Name the two forms.
Answer» A cell converts one form of energy into another form. Name the two forms.

Discussion

4955.	A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the balance reads 49 N, when the lift is stationary. If the lift moves downward with an acceleration of 5 m/s2, the reading of the spring balance would be
Answer» A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the balance reads $49 N$ , when the lift is stationary. If the lift moves downward with an acceleration of $5 {m/s}^{2}$ , the reading of the spring balance would be

Discussion

4956.	When a screw gauge with a least count of 0.01 mm is used to measure the diameter of a wire, the reading on the pitch scale is found to be 0.5 mm and the reading on the head scale is 27 divisions. If the zero error is +0.005 cm, what is the diameter of the wire?
Answer» When a screw gauge with a least count of 0.01 mm is used to measure the diameter of a wire, the reading on the pitch scale is found to be 0.5 mm and the reading on the head scale is 27 divisions. If the zero error is +0.005 cm, what is the diameter of the wire?

Discussion

4957.	if sn=2+.4n.find initial velocity and acceleration
Answer» if sn=2+.4n.find initial velocity and acceleration

Discussion

4958.	ntA wheel starting from rest is uniformly acceleratedat 2 rad/s2 for 20 sec. It is allowed to rotate uniformly for the next 10 sec. and finally brought to rest in 20 sec. The total angle rotated by the wheel in radian is?n nta.600n ntb.1200n ntc.1800n ntd.300n
Answer» ntA wheel starting from rest is uniformly acceleratedat 2 rad/s2 for 20 sec. It is allowed to rotate uniformly for the next 10 sec. and finally brought to rest in 20 sec. The total angle rotated by the wheel in radian is?n nta.600n ntb.1200n ntc.1800n ntd.300n

Discussion

4959.	What will be the behaviour of a lens, if it is placed in water instead of air?
Answer» What will be the behaviour of a lens, if it is placed in water instead of air?

Discussion

4960.	The force required to take away a flat plate of radius 4 cm from the surface of water is (surface tension of water = 70 dyne/cm)
Answer» The force required to take away a flat plate of radius 4 cm from the surface of water is (surface tension of water = 70 dyne/cm)

Discussion

4961.	Sound is a:
Answer» Sound is a:

Discussion

4962.	Question 13 What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray?
Answer» Question 13 What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray?

Discussion

4963.	Question 16 For hearing the loudest ticking sound heard by the ear, find the angle x in the Figure.
Answer» Question 16 For hearing the loudest ticking sound heard by the ear, find the angle x in the Figure.

Discussion

4964.	Explain centrifugal force and centripetel force ??
Answer» Explain centrifugal force and centripetel force ??

Discussion

4965.	A body of mass m is moving with a constant speed v on a circular path of radius r. The centripetal force acting on the body is
Answer» A body of mass m is moving with a constant speed v on a circular path of radius r. The centripetal force acting on the body is

Discussion

4966.	what is momentam and rest of inertia?
Answer» what is momentam and rest of inertia?

Discussion

4967.	What are the achievements of Chandrayaan -1?
Answer» What are the achievements of Chandrayaan -1?

Discussion

4968.	Define the term density.
Answer» Define the term density.

Discussion

4969.	The wheel of a cycle has a diameter 1 m. If the wheel has an angular speed of 5 rad/s, then calculate the speed of cycle in m/s.
Answer» The wheel of a cycle has a diameter $1 m$ . If the wheel has an angular speed of $5 rad/s$ , then calculate the speed of cycle in $m/s$ .

Discussion

4970.	31.If diameter of object is 4mm Y=9000000000 N/m*m then Length increase 0.1% needed force?? Click here to view details:
Answer» 31.If diameter of object is 4mm Y=9000000000 N/m*m then Length increase 0.1% needed force?? Click here to view details:

Discussion

4971.	49.Calculate the formal charge on S atom in most stable structure of SO3?
Answer» 49.Calculate the formal charge on S atom in most stable structure of SO3?

Discussion

4972.	Derive the formula for the kinetic energy of an object of mass m, moving with velocity v .
Answer» Derive the formula for the kinetic energy of an object of mass m, moving with velocity v .

Discussion

4973.	The distance covered by the body between 30-40 seconds is
Answer» The distance covered by the body between 30-40 seconds is

4973.

The distance covered by the body between 30-40 seconds is

Answer»

The distance covered by the body between 30-40 seconds is

Discussion

4974.	For system on which no net external force acts, momentum is:
Answer» For system on which no net external force acts, momentum is:

Discussion

4975.	What does the slope of a speed-time graph indicate ?
Answer» What does the slope of a speed-time graph indicate ?

Discussion

4976.	In the given circuit, the potential difference between Q and S is
Answer» In the given circuit, the potential difference between Q and S is

4976.

In the given circuit, the potential difference between Q and S is

Answer»

In the given circuit, the potential difference between Q and S is

Discussion

4977.	angular velocity is equal to angular frequeny in shm why?
Answer» angular velocity is equal to angular frequeny in shm why?

Discussion

4978.	If gravitational force is dependent on mass, then why does a heavy object not fall faster than a light object?
Answer» If gravitational force is dependent on mass, then why does a heavy object not fall faster than a light object?

Discussion

4979.	At what height above the surface of earth accleration due to gravity reduces by 1
Answer» At what height above the surface of earth accleration due to gravity reduces by 1

Discussion

4980.	A scooter is has to cover a distance of 10km.He covers the first 4km at a speed of 40km/h.How fast should he run his scooter for remaining journey,such that his average speed for entire journey is 60km/h?
Answer» A scooter is has to cover a distance of 10km.He covers the first 4km at a speed of 40km/h.How fast should he run his scooter for remaining journey,such that his average speed for entire journey is 60km/h?

Discussion

4981.	The current supplied by the battery in the circuit shown in figure is
Answer» The current supplied by the battery in the circuit shown in figure is

Discussion

4982.	Why is work a scalar quantity?
Answer» Why is work a scalar quantity?

Discussion

4983.	'Sun is the ultimate source of energy.' Comment
Answer» 'Sun is the ultimate source of energy.' Comment

Discussion

4984.	sound signal is sent through a composite tube as shown in the figure .the radius of the semicircular portion of the tube is r ,seed of sound in air is v .the source of sound is capable of giving varied frequencies in range ofmu 1 and mu 2 where mu 1 is greater than mu 2 .if n is an integer then frequency for maximum intensity is given by
Answer» sound signal is sent through a composite tube as shown in the figure .the radius of the semicircular portion of the tube is r ,seed of sound in air is v .the source of sound is capable of giving varied frequencies in range of mu 1 and mu 2 where mu 1 is greater than mu 2 .if n is an integer then frequency for maximum intensity is given by

Discussion

4985.	A rectangular block of wood of dimensions 40cm x 20cm x 10cm is kept on a table top. The pressure is greatest when it is rested on
Answer» A rectangular block of wood of dimensions 40cm x 20cm x 10cm is kept on a table top. The pressure is greatest when it is rested on

Discussion

4986.	Full form of kwh
Answer» Full form of kwh

Discussion

4987.	A particle is executing SHM with time period T .Starting from mean position ,time taken by it to complete 5/8 oscillations is -T/12 -T/6 -5T/12 -7T/1
Answer» A particle is executing SHM with time period T .Starting from mean position ,time taken by it to complete 5/8 oscillations is -T/12 -T/6 -5T/12 -7T/1

Discussion

4988.	During the night, an area of low pressure is formed on which of the following?
Answer» During the night, an area of low pressure is formed on which of the following?

Discussion

4989.	3. A block of mass 2kg initially at rest is dropped from a height of Im into a vertical spring having force constant 490N/m.Calculate the maximum distance through which the spring will be compressed?
Answer» 3. A block of mass 2kg initially at rest is dropped from a height of Im into a vertical spring having force constant 490N/m.Calculate the maximum distance through which the spring will be compressed?

Discussion

4990.	How to calculate the number of protons in an anion nd a cation
Answer» How to calculate the number of protons in an anion nd a cation

Discussion

4991.	83.two persons A and B of weight 80 kg and 50 kg respectively are standing at opposite ends of a Boat of mass 70 kg and length 2 m at rest. when they interchange their position then displacement of the centre of mass of both will be ?
Answer» 83.two persons A and B of weight 80 kg and 50 kg respectively are standing at opposite ends of a Boat of mass 70 kg and length 2 m at rest. when they interchange their position then displacement of the centre of mass of both will be ?

Discussion

4992.	Question 7We wish to obtain an erect image of an object, using a concave mirror of focal length 15 cm. What should be the range of distance of the object from the mirror? What is the nature of the image? Is the image larger or smaller than the object? Draw a ray diagram to show the image formation in this case.
Answer» Question 7 We wish to obtain an erect image of an object, using a concave mirror of focal length 15 cm. What should be the range of distance of the object from the mirror? What is the nature of the image? Is the image larger or smaller than the object? Draw a ray diagram to show the image formation in this case.

Discussion

4993.	6. Both Earth and Moon are subjected to the gravitational force of the Sun. As observed from the sun the orbit of moon (A) will be elliptical (B) will not be strictly ellipticalbecause that total gravitational force on it is not Central (C) is not elliptical but will necessarily be a closed curve (D) deviates considerably from being elliptical due to the influence of planets other than earth
Answer» 6. Both Earth and Moon are subjected to the gravitational force of the Sun. As observed from the sun the orbit of moon (A) will be elliptical (B) will not be strictly ellipticalbecause that total gravitational force on it is not Central (C) is not elliptical but will necessarily be a closed curve (D) deviates considerably from being elliptical due to the influence of planets other than earth

Discussion

4994.	A car moving with initial velocity of 10 ms−1 attains a speed, v in 5 seconds. The car travels a distance of 100 m. Find v.
Answer» A car moving with initial velocity of $10 m s^{- 1}$ attains a speed, v in 5 seconds. The car travels a distance of 100 m. Find v.

Discussion

4995.	State the laws of liquid pressure.
Answer» State the laws of liquid pressure.

Discussion

4996.	a magnetic field B=4t+3t2 where t is in seconds is applied perpendicular to plane of circular coil of radius a and resistance R electric charge that flows through circular wire during time interval t=0 to 2s is
Answer» a magnetic field $B = 4 t + 3 t^{2}$ where t is in seconds is applied perpendicular to plane of circular coil of radius a and resistance R electric charge that flows through circular wire during time interval t=0 to 2s is

Discussion

4997.	The position-time (x-t)graphs for two children A and B returning from their school O totheir homes P and Q respectivelyare shown in Fig. 3.19. Choose the correct entries in the bracketsbelow;(a) (A/B) lives closer to the school than (B/A)(b) (A/B) starts from the school earlier than (B/A)(c) (A/B) walks faster than (B/A)(d) A and B reach home at the (same/different) time(e) (A/B) overtakes (B/A) on the road (once/twice).
Answer» The position-time (x-t) graphs for two children A and B returning from their school O to their homes P and Q respectively are shown in Fig. 3.19. Choose the correct entries in the brackets below; (a) (A/B) lives closer to the school than (B/A) (b) (A/B) starts from the school earlier than (B/A) (c) (A/B) walks faster than (B/A) (d) A and B reach home at the (same/different) time (e) (A/B) overtakes (B/A) on the road (once/twice).

4997.

The position-time (x-t)graphs for two children A and B returning from their school O totheir homes P and Q respectivelyare shown in Fig. 3.19. Choose the correct entries in the bracketsbelow;(a) (A/B) lives closer to the school than (B/A)(b) (A/B) starts from the school earlier than (B/A)(c) (A/B) walks faster than (B/A)(d) A and B reach home at the (same/different) time(e) (A/B) overtakes (B/A) on the road (once/twice).

Answer»

The position-time (x-t)
graphs for two children A and B returning from their school O to
their homes P and Q respectively
are shown in Fig. 3.19. Choose the correct entries in the brackets
below;

(a) (A/B) lives closer to the school than (B/A)

(b) (A/B) starts from the school earlier than (B/A)

(c) (A/B) walks faster than (B/A)

(d) A and B reach home at the (same/different) time

(e) (A/B) overtakes (B/A) on the road (once/twice).

Discussion

4998.	Is the pitch of the main scale in screw gauge also equal to the least count of the main scale of screw gauge ?What does it mean when we say that the zero of the main scale is barely visible in screw gauge ?
Answer» Is the pitch of the main scale in screw gauge also equal to the least count of the main scale of screw gauge ?What does it mean when we say that the zero of the main scale is barely visible in screw gauge ?

Discussion

4999.	Question 103 Fill in the blank to make the statement true. The height of a person is 1m 65 cm. His height in millimetre is .............
Answer» Question 103 Fill in the blank to make the statement true. The height of a person is 1m 65 cm. His height in millimetre is .............

Discussion

5000.	a man who has to walk 11km finds that in 30 mins he has travelled two-ninth of the remaining distance what is his speed
Answer» a man who has to walk 11km finds that in 30 mins he has travelled two-ninth of the remaining distance what is his speed

Discussion

Explore topic-wise InterviewSolutions in .

Define watt. Express kilowatt in terms of joule per second. A 150 kg car engine develops 500 W for each kg. What force does it exert in moving the car at a speed of 20 ms−1?

Bicycle slows down when we stop pedaling. Because-

A 1000 kg vehicle moving with a velocity of 20 m/s is brought to rest in a distance of 50 m. Find the acceleration. Calculate the unbalanced force acting on the vehicle

A cell converts one form of energy into another form. Name the two forms.

A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the balance reads 49 N, when the lift is stationary. If the lift moves downward with an acceleration of 5 m/s2, the reading of the spring balance would be

When a screw gauge with a least count of 0.01 mm is used to measure the diameter of a wire, the reading on the pitch scale is found to be 0.5 mm and the reading on the head scale is 27 divisions. If the zero error is +0.005 cm, what is the diameter of the wire?

if sn=2+.4n.find initial velocity and acceleration

ntA wheel starting from rest is uniformly acceleratedat 2 rad/s2 for 20 sec. It is allowed to rotate uniformly for the next 10 sec. and finally brought to rest in 20 sec. The total angle rotated by the wheel in radian is?n nta.600n ntb.1200n ntc.1800n ntd.300n

What will be the behaviour of a lens, if it is placed in water instead of air?

The force required to take away a flat plate of radius 4 cm from the surface of water is (surface tension of water = 70 dyne/cm)

Sound is a:

Question 13 What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray?

Question 16 For hearing the loudest ticking sound heard by the ear, find the angle x in the Figure.

Explain centrifugal force and centripetel force ??

A body of mass m is moving with a constant speed v on a circular path of radius r. The centripetal force acting on the body is

what is momentam and rest of inertia?

What are the achievements of Chandrayaan -1?

Define the term density.

The wheel of a cycle has a diameter 1 m. If the wheel has an angular speed of 5 rad/s, then calculate the speed of cycle in m/s.

31.If diameter of object is 4mm Y=9000000000 N/m*m then Length increase 0.1% needed force?? Click here to view details:

49.Calculate the formal charge on S atom in most stable structure of SO3?

Derive the formula for the kinetic energy of an object of mass m, moving with velocity v .

The distance covered by the body between 30-40 seconds is

For system on which no net external force acts, momentum is:

What does the slope of a speed-time graph indicate ?

In the given circuit, the potential difference between Q and S is

angular velocity is equal to angular frequeny in shm why?

If gravitational force is dependent on mass, then why does a heavy object not fall faster than a light object?

At what height above the surface of earth accleration due to gravity reduces by 1

A scooter is has to cover a distance of 10km.He covers the first 4km at a speed of 40km/h.How fast should he run his scooter for remaining journey,such that his average speed for entire journey is 60km/h?

The current supplied by the battery in the circuit shown in figure is

Why is work a scalar quantity?

'Sun is the ultimate source of energy.' Comment

A rectangular block of wood of dimensions 40cm x 20cm x 10cm is kept on a table top. The pressure is greatest when it is rested on

Full form of kwh

A particle is executing SHM with time period T .Starting from mean position ,time taken by it to complete 5/8 oscillations is -T/12 -T/6 -5T/12 -7T/1

During the night, an area of low pressure is formed on which of the following?

3. A block of mass 2kg initially at rest is dropped from a height of Im into a vertical spring having force constant 490N/m.Calculate the maximum distance through which the spring will be compressed?

How to calculate the number of protons in an anion nd a cation

83.two persons A and B of weight 80 kg and 50 kg respectively are standing at opposite ends of a Boat of mass 70 kg and length 2 m at rest. when they interchange their position then displacement of the centre of mass of both will be ?

A car moving with initial velocity of 10 ms−1 attains a speed, v in 5 seconds. The car travels a distance of 100 m. Find v.

State the laws of liquid pressure.

a magnetic field B=4t+3t2 where t is in seconds is applied perpendicular to plane of circular coil of radius a and resistance R electric charge that flows through circular wire during time interval t=0 to 2s is

Is the pitch of the main scale in screw gauge also equal to the least count of the main scale of screw gauge ?What does it mean when we say that the zero of the main scale is barely visible in screw gauge ?

Question 103 Fill in the blank to make the statement true. The height of a person is 1m 65 cm. His height in millimetre is .............

a man who has to walk 11km finds that in 30 mins he has travelled two-ninth of the remaining distance what is his speed