9478 + Interview Questions in Physics Page 59 InterviewSolution

2901.	A charged object attracts an uncharged object by producing opposite charge in the nearer end of the uncharged object by the process of: (a) electric potential (b) electric induction (c) friction (d) electromagnetic induction
Answer» A charged object attracts an uncharged object by producing opposite charge in the nearer end of the uncharged object by the process of: (a) electric potential (b) electric induction (c) friction (d) electromagnetic induction

2901.

A charged object attracts an uncharged object by producing opposite charge in the nearer end of the uncharged object by the process of: (a) electric potential (b) electric induction (c) friction (d) electromagnetic induction

Answer»

A charged object attracts an uncharged object by producing opposite charge in the nearer end of the uncharged object by the process of:

(a) electric potential (b) electric induction

(c) friction (d) electromagnetic induction

Discussion

2902.	_____the heat energy that is absorbed by solid without showing any rise in temperature.
Answer» _____the heat energy that is absorbed by solid without showing any rise in temperature.

Discussion

2903.	112.Consider normal incidence of ray two slabs having refractive index of 3/2 and 4/3 of same thickness form a composite medium. The equivalent refractive index of composite medium is 1) 24/17 2) 17/6 3) 2 4) 17/12
Answer» 112.Consider normal incidence of ray two slabs having refractive index of 3/2 and 4/3 of same thickness form a composite medium. The equivalent refractive index of composite medium is 1) 24/17 2) 17/6 3) 2 4) 17/12

Discussion

2904.	Kindly explain,A glass beaker having mass 390 g and an interior volume of 500 cm3 floats just submerged in water when it is half filled with water. The density of material of beaker is (approximately)A 1.8 g/cm3 B. 2.8 g/cm3C 3.8 g/cm3 D 3.4 g/cm3
Answer» Kindly explain, A glass beaker having mass 390 g and an interior volume of 500 cm3 floats just submerged in water when it is half filled with water. The density of material of beaker is (approximately) A 1.8 g/cm3 B. 2.8 g/cm3 C 3.8 g/cm3 D 3.4 g/cm3

Discussion

2905.	The news says that there was an earthquake of magnitude 7.5 on the Richter scale in Nepal, and there was an earthquake of magnitude 6 on the Richter scale in your hometown. Which of the following would be true?
Answer» The news says that there was an earthquake of magnitude 7.5 on the Richter scale in Nepal, and there was an earthquake of magnitude 6 on the Richter scale in your hometown. Which of the following would be true?

Discussion

2906.	Which of the following are non-renewable source of energy:
Answer» Which of the following are non-renewable source of energy:

Discussion

2907.	Question 21 The volume of 50 g of a substance is 20 cm3. If the density of water is 1 g cm−3, will the substance float or sink?
Answer» Question 21 The volume of 50 g of a substance is $20 c m^{3}$ . If the density of water is $1 g c m^{- 3}$ , will the substance float or sink?

Discussion

2908.	What is the main function of a switch?
Answer» What is the main function of a switch?

Discussion

2909.	The distances between the various celestial objects are usually expressed in the unit of: (a) kilometres (b) light minutes (c) light years (d) light seconds
Answer» The distances between the various celestial objects are usually expressed in the unit of: (a) kilometres (b) light minutes (c) light years (d) light seconds

2909.

The distances between the various celestial objects are usually expressed in the unit of: (a) kilometres (b) light minutes (c) light years (d) light seconds

Answer»

The distances between the various celestial objects are usually expressed in the unit of:

(a) kilometres

(b) light minutes

(c) light years

(d) light seconds

Discussion

2910.	particle move dist. x in time t according to eq. x={(t+5)}^{-1}. the acceleration of particle is proportional t
Answer» particle move dist. x in time t according to eq. x={(t+5)}^{-1}. the acceleration of particle is proportional t

Discussion

2911.	A monatomic gas (ideal) is supplied 80 joule heatat constant pressure. The internal energy of gas,increases by
Answer» A monatomic gas (ideal) is supplied 80 joule heat at constant pressure. The internal energy of gas, increases by

Discussion

2912.	Which type of friction we will prefer to make the fastest train in the world
Answer» Which type of friction we will prefer to make the fastest train in the world

Discussion

2913.	Describe an experiment to demonstrate that air exerts pressure.
Answer» Describe an experiment to demonstrate that air exerts pressure.

Discussion

2914.	What is kinetic energy in reference to matter?
Answer» What is kinetic energy in reference to matter?

Discussion

2915.	A steel bar of 10×50 mm is cantilevered with two M12 bolts (P and Q) to support a static load of 4 kN as shown in the figure.The primary and secondary shear loads on bolt P, respectively, are
Answer» A steel bar of $10 \times 50 m m$ is cantilevered with two $M 12$ bolts (P and Q) to support a static load of $4 k N$ as shown in the figure. The primary and secondary shear loads on bolt $P$ , respectively, are

Discussion

2916.	an observer is at distance r metre from an isotropic point light source whose power is H Watt .the rms value of electric field at the position of observer
Answer» an observer is at distance r metre from an isotropic point light source whose power is H Watt .the rms value of electric field at the position of observer

Discussion

2917.	a solid cylinder and a hollow cylinder both of the same mass and same external diameter are released from same height at the same time on inclined plane both roll down without slipping which one will reach the bottom first
Answer» a solid cylinder and a hollow cylinder both of the same mass and same external diameter are released from same height at the same time on inclined plane both roll down without slipping which one will reach the bottom first

Discussion

2918.	if the lattice cons†an t of this semiconductor is decreased then which of the following is correct
Answer» if the lattice cons†an t of this semiconductor is decreased then which of the following is correct

Discussion

2919.	Why do gymnasts apply a coarse substance to their hands ?
Answer» Why do gymnasts apply a coarse substance to their hands ?

Discussion

2920.	What do you mean by electroplating, and why we do so? Give 3 examples. 【3marks】
Answer» What do you mean by electroplating, and why we do so? Give 3 examples. 【3marks】

Discussion

2921.	Relation between celsius scale and kelvin scale?
Answer» Relation between celsius scale and kelvin scale?

Discussion

2922.	Give a definition for pitch in a sentence
Answer» Give a definition for pitch in a sentence

Discussion

2923.	Fig.816 shows two ways of connecting the three bulbs A, B and C to a battery. Name the two arrangements. Which of them do you prefer to use in a household circuit? Give a reason to support your answer.
Answer» Fig.816 shows two ways of connecting the three bulbs A, B and C to a battery. Name the two arrangements. Which of them do you prefer to use in a household circuit? Give a reason to support your answer.

2923.

Fig.816 shows two ways of connecting the three bulbs A, B and C to a battery. Name the two arrangements. Which of them do you prefer to use in a household circuit? Give a reason to support your answer.

Answer»

Fig.816 shows two ways of connecting the three bulbs A, B and C to a battery. Name the two arrangements. Which of them do you prefer to use in a household circuit? Give a reason to support your answer.

Discussion

2924.	Find the potenial energy possessed by a body of mass 4 kg when it is at height of 10 m above the ground. (Take g=10 ms−2 )400
Answer» Find the potenial energy possessed by a body of mass $4 k g$ when it is at height of $10 m$ above the ground. (Take $g = 10 m s^{- 2}$ ) 400

Discussion

2925.	Is electrostatic force a conservative force??
Answer» Is electrostatic force a conservative force??

Discussion

2926.	A conducting wire of length l, area of cross-section A and electrical resistivity ρ is connected between the terminals of a battery. A potential difference V is developed between its ends, causing an electric current. If the length of the wire is doubled and the area of cross-section is halved, the resultant current would be:
Answer» A conducting wire of length $l$ , area of cross-section $A$ and electrical resistivity $ρ$ is connected between the terminals of a battery. A potential difference $V$ is developed between its ends, causing an electric current. If the length of the wire is doubled and the area of cross-section is halved, the resultant current would be:

Discussion

2927.	A car can go 0 to 5 ms−1 by just accelerating for a distance of 50 meters. Find the acceleration of the car, given that it is constant.
Answer» A car can go $0$ to $5 m s^{- 1}$ by just accelerating for a distance of 50 meters. Find the acceleration of the car, given that it is constant.

Discussion

2928.	A boy stands on the ground. The area below his feet is 70 cm2. The pressure he exerts on the ground is 7 N/cm2. Calculate the total force acting on the ground.
Answer» A boy stands on the ground. The area below his feet is 70 cm $^{2}$ . The pressure he exerts on the ground is 7 N/cm $^{2}$ . Calculate the total force acting on the ground.

Discussion

2929.	work done in an open vessel at 300 K, when12 g iron reacts with dil HCI to give FeCl2 is nearly1) 1.1 kcal3) 0.3 kcal(2) 0.6 kcal(4) 0.2 kcalса
Answer» work done in an open vessel at 300 K, when12 g iron reacts with dil HCI to give FeCl2 is nearly1) 1.1 kcal3) 0.3 kcal(2) 0.6 kcal(4) 0.2 kcalса

Discussion

2930.	How the straw works in sucking liquid
Answer» How the straw works in sucking liquid

Discussion

2931.	Two persons A and B, each carrying a source of sound of frequency f, are standing a few metres apart in a quiet field. A starts moving towards B with a speed u. If v is the speed of sound, the number of beats heard per second by A will be
Answer» Two persons A and B, each carrying a source of sound of frequency $f$ , are standing a few metres apart in a quiet field. A starts moving towards B with a speed $u$ . If $v$ is the speed of sound, the number of beats heard per second by A will be

Discussion

2932.	40.Consider two observers was moving with respect to each other at a speed V along a straight line. They observe a block of mass moving adistance l on a rough of surface .the following quantities will be same as observed by the two observes
Answer» 40.Consider two observers was moving with respect to each other at a speed V along a straight line. They observe a block of mass moving adistance l on a rough of surface .the following quantities will be same as observed by the two observes

Discussion

2933.	Question 11Name the effect of current responsible for the glow of the bulb in an electric circuit.
Answer» Question 11 Name the effect of current responsible for the glow of the bulb in an electric circuit.

Discussion

2934.	The loudness of a sound is 8 dB when the amplitude of vibrations is 2 units. If the amplitude is increased to 8 units, find the loudness of the sound in dB.
Answer» The loudness of a sound is 8 dB when the amplitude of vibrations is 2 units. If the amplitude is increased to 8 units, find the loudness of the sound in dB.

Discussion

2935.	Three persons P, Q and R pull a block with equal forces as shown in the figure. Identify the correct direction of motion of the block?
Answer» Three persons P, Q and R pull a block with equal forces as shown in the figure. Identify the correct direction of motion of the block?

2935.

Three persons P, Q and R pull a block with equal forces as shown in the figure. Identify the correct direction of motion of the block?

Answer»

Three persons P, Q and R pull a block with equal forces as shown in the figure. Identify the correct direction of motion of the block?

Discussion

2936.	5.) Knowing that mass of Moon is 81 where M isthe mass of Earth, find the distance of the pointwhere gravitational field due to Earth and Mooncancel each other, from the Moon. Given thatdistance between Earth and Moon is 60 R, whereR is the radius of Earth(1) 2 R(3) 6 R(2) 4 R(4) 8 R2
Answer» 5.) Knowing that mass of Moon is 81 where M isthe mass of Earth, find the distance of the pointwhere gravitational field due to Earth and Mooncancel each other, from the Moon. Given thatdistance between Earth and Moon is 60 R, whereR is the radius of Earth(1) 2 R(3) 6 R(2) 4 R(4) 8 R2

Discussion

2937.	What are different methods used for prevention of rusting of iron?
Answer» What are different methods used for prevention of rusting of iron?

Discussion

2938.	What is the difference between voltage,electromotive force and potential difference?
Answer» What is the difference between voltage,electromotive force and potential difference?

Discussion

2939.	What forms our solar system?
Answer» What forms our solar system?

Discussion

2940.	Is electrostatic force is an example of non contact force?
Answer» Is electrostatic force is an example of non contact force?

Discussion

2941.	Consider the situation shown in the figure below. The wall is smooth but the surfaces of A and B in contact are rough. Can the system remain in equilibrium?
Answer» Consider the situation shown in the figure below. The wall is smooth but the surfaces of A and B in contact are rough. Can the system remain in equilibrium?

Discussion

2942.	Draw a labelled diagram of a gold leaf electroscope and describe its construction.
Answer» Draw a labelled diagram of a gold leaf electroscope and describe its construction.

Discussion

2943.	41.The amount of reflection a sound wave undergoes depends upon:- 1.)Speed of the wave 2.)Density of the medium 3.)both of above 4.)none of these
Answer» 41.The amount of reflection a sound wave undergoes depends upon:- 1.)Speed of the wave 2.)Density of the medium 3.)both of above 4.)none of these

Discussion

2944.	If the radius of curvature of a convex mirror is 20 cm, calculate its focal length (in cm).10
Answer» If the radius of curvature of a convex mirror is 20 cm, calculate its focal length (in cm). 10

Discussion

2945.	A pipe closed at one end produces a fundamental note of 412 Hz. It is cut into two pieces of equal length. The fundamental notes produced by the two pieces are
Answer» A pipe closed at one end produces a fundamental note of $412 Hz$ . It is cut into two pieces of equal length. The fundamental notes produced by the two pieces are

Discussion

2946.	What sounds do you hear on the road in the morning? What is the vegetable man selling? Why is the road annoyed with the crow?
Answer» What sounds do you hear on the road in the morning? What is the vegetable man selling? Why is the road annoyed with the crow?

Discussion

2947.	A glass capillary tube has a radius of 0.05 cm. The tube is dipped in a container filled with water (surface tension of water =0.075 Nm–1). What is the height of water rise in capillary tube due to capillary action?
Answer» A glass capillary tube has a radius of $0.05 cm$ . The tube is dipped in a container filled with water $($ surface tension of water $= 0.075 {Nm}^{- 1})$ . What is the height of water rise in capillary tube due to capillary action?

Discussion

2948.	Find the relation between the acceleration due to gravity on the surfaces of two planets A and B of masses mA and mB and radii RA and RB respectively. If they have same densities.
Answer» Find the relation between the acceleration due to gravity on the surfaces of two planets $A$ and $B$ of masses $m_{A}$ and $m_{B}$ and radii $R_{A}$ and $R_{B}$ respectively. If they have same densities.

Discussion

2949.	A man was s†an ding at dis†an ce equal to focal length f in front of a convex mirror.The image of a man will be formed from pole of mirror at a dis†an ce(1) Infinity(2) 2f(3) f(4) f/
Answer» A man was s†an ding at dis†an ce equal to focal length f in front of a convex mirror.The image of a man will be formed from pole of mirror at a dis†an ce(1) Infinity(2) 2f(3) f(4) f/

Discussion

2950.	What happened to the leaves of an electoscope if a negatively charged body is brought near an negatively charged electroscope
Answer» What happened to the leaves of an electoscope if a negatively charged body is brought near an negatively charged electroscope

Discussion

Explore topic-wise InterviewSolutions in .

A charged object attracts an uncharged object by producing opposite charge in the nearer end of the uncharged object by the process of: (a) electric potential (b) electric induction (c) friction (d) electromagnetic induction

_____the heat energy that is absorbed by solid without showing any rise in temperature.

112.Consider normal incidence of ray two slabs having refractive index of 3/2 and 4/3 of same thickness form a composite medium. The equivalent refractive index of composite medium is 1) 24/17 2) 17/6 3) 2 4) 17/12

Kindly explain,A glass beaker having mass 390 g and an interior volume of 500 cm3 floats just submerged in water when it is half filled with water. The density of material of beaker is (approximately)A 1.8 g/cm3 B. 2.8 g/cm3C 3.8 g/cm3 D 3.4 g/cm3

The news says that there was an earthquake of magnitude 7.5 on the Richter scale in Nepal, and there was an earthquake of magnitude 6 on the Richter scale in your hometown. Which of the following would be true?

Which of the following are non-renewable source of energy:

Question 21 The volume of 50 g of a substance is 20 cm3. If the density of water is 1 g cm−3, will the substance float or sink?

What is the main function of a switch?

The distances between the various celestial objects are usually expressed in the unit of: (a) kilometres (b) light minutes (c) light years (d) light seconds

particle move dist. x in time t according to eq. x={(t+5)}^{-1}. the acceleration of particle is proportional t

A monatomic gas (ideal) is supplied 80 joule heatat constant pressure. The internal energy of gas,increases by

Which type of friction we will prefer to make the fastest train in the world

Describe an experiment to demonstrate that air exerts pressure.

What is kinetic energy in reference to matter?

A steel bar of 10×50 mm is cantilevered with two M12 bolts (P and Q) to support a static load of 4 kN as shown in the figure.The primary and secondary shear loads on bolt P, respectively, are

an observer is at distance r metre from an isotropic point light source whose power is H Watt .the rms value of electric field at the position of observer

a solid cylinder and a hollow cylinder both of the same mass and same external diameter are released from same height at the same time on inclined plane both roll down without slipping which one will reach the bottom first

if the lattice cons†an t of this semiconductor is decreased then which of the following is correct

Why do gymnasts apply a coarse substance to their hands ?

What do you mean by electroplating, and why we do so? Give 3 examples. 【3marks】

Relation between celsius scale and kelvin scale?

Give a definition for pitch in a sentence

Fig.816 shows two ways of connecting the three bulbs A, B and C to a battery. Name the two arrangements. Which of them do you prefer to use in a household circuit? Give a reason to support your answer.

Find the potenial energy possessed by a body of mass 4 kg when it is at height of 10 m above the ground. (Take g=10 ms−2 )400

Is electrostatic force a conservative force??

A car can go 0 to 5 ms−1 by just accelerating for a distance of 50 meters. Find the acceleration of the car, given that it is constant.

A boy stands on the ground. The area below his feet is 70 cm2. The pressure he exerts on the ground is 7 N/cm2. Calculate the total force acting on the ground.

work done in an open vessel at 300 K, when12 g iron reacts with dil HCI to give FeCl2 is nearly1) 1.1 kcal3) 0.3 kcal(2) 0.6 kcal(4) 0.2 kcalса

How the straw works in sucking liquid

Two persons A and B, each carrying a source of sound of frequency f, are standing a few metres apart in a quiet field. A starts moving towards B with a speed u. If v is the speed of sound, the number of beats heard per second by A will be

40.Consider two observers was moving with respect to each other at a speed V along a straight line. They observe a block of mass moving adistance l on a rough of surface .the following quantities will be same as observed by the two observes

Question 11Name the effect of current responsible for the glow of the bulb in an electric circuit.

The loudness of a sound is 8 dB when the amplitude of vibrations is 2 units. If the amplitude is increased to 8 units, find the loudness of the sound in dB.

Three persons P, Q and R pull a block with equal forces as shown in the figure. Identify the correct direction of motion of the block?

5.) Knowing that mass of Moon is 81 where M isthe mass of Earth, find the distance of the pointwhere gravitational field due to Earth and Mooncancel each other, from the Moon. Given thatdistance between Earth and Moon is 60 R, whereR is the radius of Earth(1) 2 R(3) 6 R(2) 4 R(4) 8 R2

What are different methods used for prevention of rusting of iron?

What is the difference between voltage,electromotive force and potential difference?

What forms our solar system?

Is electrostatic force is an example of non contact force?

Consider the situation shown in the figure below. The wall is smooth but the surfaces of A and B in contact are rough. Can the system remain in equilibrium?

Draw a labelled diagram of a gold leaf electroscope and describe its construction.

41.The amount of reflection a sound wave undergoes depends upon:- 1.)Speed of the wave 2.)Density of the medium 3.)both of above 4.)none of these

If the radius of curvature of a convex mirror is 20 cm, calculate its focal length (in cm).10

A pipe closed at one end produces a fundamental note of 412 Hz. It is cut into two pieces of equal length. The fundamental notes produced by the two pieces are

What sounds do you hear on the road in the morning? What is the vegetable man selling? Why is the road annoyed with the crow?

A glass capillary tube has a radius of 0.05 cm. The tube is dipped in a container filled with water (surface tension of water =0.075 Nm–1). What is the height of water rise in capillary tube due to capillary action?

Find the relation between the acceleration due to gravity on the surfaces of two planets A and B of masses mA and mB and radii RA and RB respectively. If they have same densities.

A man was s†an ding at dis†an ce equal to focal length f in front of a convex mirror.The image of a man will be formed from pole of mirror at a dis†an ce(1) Infinity(2) 2f(3) f(4) f/

What happened to the leaves of an electoscope if a negatively charged body is brought near an negatively charged electroscope