3752 + Interview Questions in Physics Page 38 InterviewSolution

1851.	What is power? How do you differentiate kilowatt from kilowatt hour? The Jog Falls in Karnataka state are nearly 20 m high. 2000 tonnes of water falls from it in a minute. Calculate the equivalent power if all this energy can be utilized? (g=10ms−2)
Answer» What is power? How do you differentiate kilowatt from kilowatt hour? The Jog Falls in Karnataka state are nearly 20 m high. 2000 tonnes of water falls from it in a minute. Calculate the equivalent power if all this energy can be utilized? ( $g = 10 m s^{- 2}$ )

Discussion

1852.	इस संसार में सच्चा संत कौन कहलाता है?
Answer» इस संसार में सच्चा संत कौन कहलाता है?

Discussion

1853.	Blocks P and Q are released from rest in the poitions shown. Neglect friction between all surfaces, i.e., both blocks can translate freely. Then the direction of the acceleration of blcok Q (i.e. aQ) is
Answer» Blocks P and Q are released from rest in the poitions shown. Neglect friction between all surfaces, i.e., both blocks can translate freely. Then the direction of the acceleration of blcok Q (i.e. $a_{Q}$ ) is

Discussion

1854.	Why is it important to maintain machines in daily life?
Answer» Why is it important to maintain machines in daily life?

Discussion

1855.	The single touch method of making a magnet is extensively used nowadays to make magnets. True or false?
Answer» The single touch method of making a magnet is extensively used nowadays to make magnets. True or false?

Discussion

1856.	What care must retailers take with respect to weights and measures?
Answer» What care must retailers take with respect to weights and measures?

Discussion

1857.	The force exerted by the floor of an elevator on the foot of a person , is more when elevator is going up than when it is going down What is the reason?
Answer» The force exerted by the floor of an elevator on the foot of a person , is more when elevator is going up than when it is going down What is the reason?

Discussion

1858.	48.Integraction cos square thita
Answer» 48.Integraction cos square thita

Discussion

1859.	Two circular coils mounted parallel to each other on the same axis carry steady currents .If an observer between the coils reports that one coil carrying a clockwise current i, while other is carrying a counter clockwise current i, between the two coils , then there is 1)steady repulsive force 2)zero force 3)repulsive force 4)a steady attractive f
Answer» Two circular coils mounted parallel to each other on the same axis carry steady currents .If an observer between the coils reports that one coil carrying a clockwise current i, while other is carrying a counter clockwise current i, between the two coils , then there is 1)steady repulsive force 2)zero force 3)repulsive force 4)a steady attractive f

Discussion

1860.	what is the difference between Differential and Integral?
Answer» what is the difference between Differential and Integral?

Discussion

1861.	What are the types of force that we observe in our daily lives?
Answer» What are the types of force that we observe in our daily lives?

Discussion

1862.	Question 3Alida runs her toy car on a dry marble floor, wet marble floor, newspaper and towel spread on the floor. The force of friction acting on the car on different surfaces in increasing order will be (a) wet marble floor, dry marble floor, newspaper and towel.(b) newspaper, towel, dry marble floor, wet marble floor.(c) towel, newspaper, dry marble floor, wet marble floor(d) wet marble floor, dry marble floor, towel, newspaper
Answer» Question 3 Alida runs her toy car on a dry marble floor, wet marble floor, newspaper and towel spread on the floor. The force of friction acting on the car on different surfaces in increasing order will be (a) wet marble floor, dry marble floor, newspaper and towel. (b) newspaper, towel, dry marble floor, wet marble floor. (c) towel, newspaper, dry marble floor, wet marble floor (d) wet marble floor, dry marble floor, towel, newspaper

Discussion

1863.	Draw a labelled diagram to show the formation of an image of a tree by a pin-hole camera.
Answer» Draw a labelled diagram to show the formation of an image of a tree by a pin-hole camera.

Discussion

1864.	Question 4:Define the following terms:(i) Boiling point(ii) Melting point
Answer» Question 4: Define the following terms: (i) Boiling point (ii) Melting point

1864.

Question 4:Define the following terms:(i) Boiling point(ii) Melting point

Answer»

Question 4:

Define the following terms:

(i) Boiling point

(ii) Melting point

Discussion

1865.	Which of the following is false with respect to shadows and mirror images?
Answer» Which of the following is false with respect to shadows and mirror images?

Discussion

1866.	Discuss the major cause of winds.
Answer» Discuss the major cause of winds.

Discussion

1867.	A freely suspended magnet comes to rest in the(a) north-south direction.(b) north-east direction.(c) north-west direction.(d) east-west direction.
Answer» A freely suspended magnet comes to rest in the (a) north-south direction. (b) north-east direction. (c) north-west direction. (d) east-west direction.

Discussion

1868.	Which of the following type(s) of motion is/are exhibited by a rotating fan?
Answer» Which of the following type(s) of motion is/are exhibited by a rotating fan?

Discussion

1869.	Mention any three characteristics of the planet Neptune.
Answer» Mention any three characteristics of the planet Neptune.

Discussion

1870.	Is secondary rainbow practically possible?
Answer» Is secondary rainbow practically possible?

Discussion

1871.	Which of the following forces is responsible for rain falling downwards?
Answer» Which of the following forces is responsible for rain falling downwards?

Discussion

1872.	Early magnets were called
Answer» Early magnets were called

Discussion

1873.	Split the following shapes into rectangles and find the area of the given figure. (The measures are given in centimetres)
Answer» Split the following shapes into rectangles and find the area of the given figure. (The measures are given in centimetres)

Discussion

1874.	Can a magnet be de-magnetized
Answer» Can a magnet be de-magnetized

Discussion

1875.	Question 1What is power?
Answer» Question 1 What is power?

Discussion

1876.	Define the term magnetic field of a magnet. How will you recognise it experimentally ?
Answer» Define the term magnetic field of a magnet. How will you recognise it experimentally ?

Discussion

1877.	In ancient India, small length measurements used were an 'angul' (finger) or a mutthi (fist). These methods were stopped because of the need for the standard unit.
Answer» In ancient India, small length measurements used were an 'angul' (finger) or a mutthi (fist). These methods were stopped because of the need for the standard unit.

Discussion

1878.	Look at the figure given below.Will there be any difference in the shadow formed on the screen in case A and case B?
Answer» Look at the figure given below. Will there be any difference in the shadow formed on the screen in case A and case B?

Discussion

1879.	HARD
Answer» HARD

Discussion

1880.	two long parallel wires are seperated by a dis†an ce of 8cm carry electric current of 3A and 5A.the dis†an ce of null point from the conductor carrying larger current when currents are flowing in the same direction
Answer» two long parallel wires are seperated by a dis†an ce of 8cm carry electric current of 3A and 5A.the dis†an ce of null point from the conductor carrying larger current when currents are flowing in the same direction

Discussion

1881.	We cannot see through the door because:
Answer» We cannot see through the door because:

Discussion

1882.	Friction is a type of:
Answer» Friction is a type of:

Discussion

1883.	Why is there always a Discontinuity in electric field due to surface charge distributions?
Answer» Why is there always a Discontinuity in electric field due to surface charge distributions?

Discussion

1884.	Which physical quantity is used to describe how far a body has travelled?
Answer» Which physical quantity is used to describe how far a body has travelled?

Discussion

1885.	The potential energy 'u' of a particle varies with distance 'x' from origin as u=AXX+B, where A and B are constant. The dimensions of A and B are respectively?
Answer» The potential energy 'u' of a particle varies with distance 'x' from origin as u=AXX+B, where A and B are constant. The dimensions of A and B are respectively?

Discussion

1886.	"नरेंद्र ज़रा शरारती है न इसी से डर लग रहा है।" (क) नरेंद्र की माँ रेखा अजय की माँ से ऐसा क्यों कहती है? (ख) नरेंद्र में ऐसा कौन-सा गुण होता जिससे उसकी माँ नहीं डरती और अजय की माँ से यह नहीं कहती कि नरेंद्र ज़रा शरारती है। "घबराइए नहीं, रेखा जी–देखिए मेरा बेटा भी तो है लेकिन अजय पर तो मुझे पूरा विश्वास है" (ग) अजय की माँ नरेंद्र की माँ से ऐसा क्यों कहती है?
Answer» "नरेंद्र ज़रा शरारती है न इसी से डर लग रहा है।" (क) नरेंद्र की माँ रेखा अजय की माँ से ऐसा क्यों कहती है? (ख) नरेंद्र में ऐसा कौन-सा गुण होता जिससे उसकी माँ नहीं डरती और अजय की माँ से यह नहीं कहती कि नरेंद्र ज़रा शरारती है। "घबराइए नहीं, रेखा जी–देखिए मेरा बेटा भी तो है लेकिन अजय पर तो मुझे पूरा विश्वास है" (ग) अजय की माँ नरेंद्र की माँ से ऐसा क्यों कहती है?

1886.

"नरेंद्र ज़रा शरारती है न इसी से डर लग रहा है।" (क) नरेंद्र की माँ रेखा अजय की माँ से ऐसा क्यों कहती है? (ख) नरेंद्र में ऐसा कौन-सा गुण होता जिससे उसकी माँ नहीं डरती और अजय की माँ से यह नहीं कहती कि नरेंद्र ज़रा शरारती है। "घबराइए नहीं, रेखा जी–देखिए मेरा बेटा भी तो है लेकिन अजय पर तो मुझे पूरा विश्वास है" (ग) अजय की माँ नरेंद्र की माँ से ऐसा क्यों कहती है?

Answer»

"नरेंद्र ज़रा शरारती है न इसी से डर लग रहा है।"

(क) नरेंद्र की माँ रेखा अजय की माँ से ऐसा क्यों कहती है?

(ख) नरेंद्र में ऐसा कौन-सा गुण होता जिससे उसकी माँ नहीं डरती और अजय की माँ से यह नहीं कहती कि नरेंद्र ज़रा शरारती है।

"घबराइए नहीं, रेखा जी–देखिए मेरा बेटा भी तो है लेकिन अजय पर तो मुझे पूरा विश्वास है"

(ग) अजय की माँ नरेंद्र की माँ से ऐसा क्यों कहती है?

Discussion

1887.	Answer these questions :(a) Which different forms of energy are released when fireworks explode? Why?(b) Why is it now necessary to use fuels with thrift?
Answer» Answer these questions : (a) Which different forms of energy are released when fireworks explode? Why? (b) Why is it now necessary to use fuels with thrift?

1887.

Answer these questions :(a) Which different forms of energy are released when fireworks explode? Why?(b) Why is it now necessary to use fuels with thrift?

Answer»

Answer these questions :

(a) Which different forms of energy are released when fireworks explode? Why?

(b) Why is it now necessary to use fuels with thrift?

Discussion

1888.	Consider three point objects P, Q and R. P and Qrepel each other, while P and R attract. What isthe nature of force between Q and R?
Answer» Consider three point objects P, Q and R. P and Qrepel each other, while P and R attract. What isthe nature of force between Q and R?

Discussion

1889.	Light can travel through a bent tube just like water can. True or false?
Answer» Light can travel through a bent tube just like water can. True or false?

Discussion

1890.	Question 3In case of negative work in the angle between the force and displacement is(a) 0∘(b) 45∘(c) 90∘(d) 180∘
Answer» Question 3 In case of negative work in the angle between the force and displacement is (a) $0^{\circ}$ (b) $45^{\circ}$ (c) $90^{\circ}$ (d) $180^{\circ}$

Discussion

1891.	Two surfaces are rubbed together, first with a small force and then with a greater force. In which case will the friction between the surfaces be higher? Give reasons.
Answer» Two surfaces are rubbed together, first with a small force and then with a greater force. In which case will the friction between the surfaces be higher? Give reasons.

Discussion

1892.	What does harmomic oscillations do.
Answer» What does harmomic oscillations do.

Discussion

1893.	Define Rolling friction.
Answer» Define Rolling friction.

Discussion

1894.	Explain the Archimedes' screw and one of its modern applications.
Answer» Explain the Archimedes' screw and one of its modern applications.

Discussion

1895.	The type of lever in which effort is in the middle between the fulcrum and the load
Answer» The type of lever in which effort is in the middle between the fulcrum and the load

Discussion

1896.	संगीत शिक्षक की सहायता से इस गीत को लयबद्ध कीजिए।
Answer» संगीत शिक्षक की सहायता से इस गीत को लयबद्ध कीजिए।

Discussion

1897.	Explain why the sky appears black from the moon .
Answer» Explain why the sky appears black from the moon .

Discussion

1898.	mass of a body is (10\pm0.1) kg .Volume is (1\pm0.1) m^{3 }.then the density is given b
Answer» mass of a body is (10\pm0.1) kg .Volume is (1\pm0.1) m^{3 }.then the density is given b

Discussion

1899.	A particle is moving along a circle such that it completes one revolution in 40 seconds. In 2minutes 20 seconds, the ratiodisplacementdistanceis
Answer» A particle is moving along a circle such that it completes one revolution in 40 seconds. In 2 minutes 20 seconds, the ratio displacement distance is

Discussion

1900.	What is 'component' in Physics? (eg: component of force
Answer» What is 'component' in Physics? (eg: component of force

Discussion

Explore topic-wise InterviewSolutions in .

What is power? How do you differentiate kilowatt from kilowatt hour? The Jog Falls in Karnataka state are nearly 20 m high. 2000 tonnes of water falls from it in a minute. Calculate the equivalent power if all this energy can be utilized? (g=10ms−2)

इस संसार में सच्चा संत कौन कहलाता है?

Blocks P and Q are released from rest in the poitions shown. Neglect friction between all surfaces, i.e., both blocks can translate freely. Then the direction of the acceleration of blcok Q (i.e. aQ) is

Why is it important to maintain machines in daily life?

The single touch method of making a magnet is extensively used nowadays to make magnets. True or false?

What care must retailers take with respect to weights and measures?

The force exerted by the floor of an elevator on the foot of a person , is more when elevator is going up than when it is going down What is the reason?

48.Integraction cos square thita

what is the difference between Differential and Integral?

What are the types of force that we observe in our daily lives?

Draw a labelled diagram to show the formation of an image of a tree by a pin-hole camera.

Question 4:Define the following terms:(i) Boiling point(ii) Melting point

Which of the following is false with respect to shadows and mirror images?

Discuss the major cause of winds.

A freely suspended magnet comes to rest in the(a) north-south direction.(b) north-east direction.(c) north-west direction.(d) east-west direction.

Which of the following type(s) of motion is/are exhibited by a rotating fan?

Mention any three characteristics of the planet Neptune.

Is secondary rainbow practically possible?

Which of the following forces is responsible for rain falling downwards?

Early magnets were called

Split the following shapes into rectangles and find the area of the given figure. (The measures are given in centimetres)

Can a magnet be de-magnetized

Question 1What is power?

Define the term magnetic field of a magnet. How will you recognise it experimentally ?

In ancient India, small length measurements used were an 'angul' (finger) or a mutthi (fist). These methods were stopped because of the need for the standard unit.

Look at the figure given below.Will there be any difference in the shadow formed on the screen in case A and case B?

HARD

two long parallel wires are seperated by a dis†an ce of 8cm carry electric current of 3A and 5A.the dis†an ce of null point from the conductor carrying larger current when currents are flowing in the same direction

We cannot see through the door because:

Friction is a type of:

Why is there always a Discontinuity in electric field due to surface charge distributions?

Which physical quantity is used to describe how far a body has travelled?

The potential energy 'u' of a particle varies with distance 'x' from origin as u=AXX+B, where A and B are constant. The dimensions of A and B are respectively?

Answer these questions :(a) Which different forms of energy are released when fireworks explode? Why?(b) Why is it now necessary to use fuels with thrift?

Consider three point objects P, Q and R. P and Qrepel each other, while P and R attract. What isthe nature of force between Q and R?

Light can travel through a bent tube just like water can. True or false?

Question 3In case of negative work in the angle between the force and displacement is(a) 0∘(b) 45∘(c) 90∘(d) 180∘

Two surfaces are rubbed together, first with a small force and then with a greater force. In which case will the friction between the surfaces be higher? Give reasons.

What does harmomic oscillations do.

Define Rolling friction.

Explain the Archimedes' screw and one of its modern applications.

The type of lever in which effort is in the middle between the fulcrum and the load

संगीत शिक्षक की सहायता से इस गीत को लयबद्ध कीजिए।

Explain why the sky appears black from the moon .

mass of a body is (10\pm0.1) kg .Volume is (1\pm0.1) m^{3 }.then the density is given b

A particle is moving along a circle such that it completes one revolution in 40 seconds. In 2minutes 20 seconds, the ratiodisplacementdistanceis

What is 'component' in Physics? (eg: component of force