9478 + Interview Questions in Physics Page 7 InterviewSolution

301.	If 1st overtone of an open organ pipe has same frequency as that of 1st overtone of closed organ pipe then the ratio of their lengths is Options: a- 1 : 1 b-1 : 3 c- 4 : 3 d-2 : 3
Answer» If 1st overtone of an open organ pipe has same frequency as that of 1st overtone of closed organ pipe then the ratio of their lengths is Options: a- 1 : 1 b-1 : 3 c- 4 : 3 d-2 : 3

Discussion

302.	Intermediate state of apparent expansion of ___cannot be observed.
Answer» Intermediate state of apparent expansion of ___cannot be observed.

Discussion

303.	How many moleculesof O2 are present in 1L air containing 80% volume of O2 at STP.
Answer» How many moleculesof O2 are present in 1L air containing 80% volume of O2 at STP.

Discussion

304.	The upper half of an inclined plane of inclination theta is perfectly smooth while the lower half is rough . A body starting from the rest at top comes back to rest at the bottom if the coefficient of friction for the lower is given by
Answer» The upper half of an inclined plane of inclination theta is perfectly smooth while the lower half is rough . A body starting from the rest at top comes back to rest at the bottom if the coefficient of friction for the lower is given by

Discussion

305.	If friction does depend on the surface area of contact, what if both the surfaces have similar atomic irregularities. Would it change
Answer» If friction does depend on the surface area of contact, what if both the surfaces have similar atomic irregularities. Would it change

Discussion

306.	two solid pieces one of steel and the other of aluminium when immersed completely in water have equal weights with the solid pieces
Answer» two solid pieces one of steel and the other of aluminium when immersed completely in water have equal weights with the solid pieces

Discussion

307.	Change the sentence to indirect speech. The sole survivor of the earthquake sobbed, “I was trapped beneath the rubble for two days.”
Answer» Change the sentence to indirect speech. The sole survivor of the earthquake sobbed, “I was trapped beneath the rubble for two days.”

307.

Change the sentence to indirect speech. The sole survivor of the earthquake sobbed, “I was trapped beneath the rubble for two days.”

Answer»

Change the sentence to indirect speech.

The sole survivor of the earthquake sobbed, “I was trapped beneath the rubble for two days.”

Discussion

308.	Which among the following requires a medium for propagation?
Answer» Which among the following requires a medium for propagation?

Discussion

309.	When you are looking at the objects closer to the eye, the focal length of eye lens:
Answer» When you are looking at the objects closer to the eye, the focal length of eye lens:

Discussion

310.	36.The rod of length l = 1m rotates with an angular velocity = 2rad/s and the Point P moves with velocity v =1m/s and accelration a = 1m/s. Find the velocity of Q.
Answer» 36.The rod of length l = 1m rotates with an angular velocity = 2rad/s and the Point P moves with velocity v =1m/s and accelration a = 1m/s. Find the velocity of Q.

Discussion

311.	14 two equal positive charges Q are fixed at points (a,0) and (-a,0) on the x-axis. An opposite charge -q at rest is released from the point (0,a) on the y-axis. The charge -qwilla) move to infinityb) move to originc) undergo SHM about the origind) execute oscillatory periodic motion but not SHM
Answer» 14 two equal positive charges Q are fixed at points (a,0) and (-a,0) on the x-axis. An opposite charge -q at rest is released from the point (0,a) on the y-axis. The charge -qwilla) move to infinityb) move to originc) undergo SHM about the origind) execute oscillatory periodic motion but not SHM

Discussion

312.

1 2 3 4 trunk sink wrinkle worry sunk think wriggle work junk pink write wonderful • When we read 'w' in column 3 it has no sound.• Look at the word 'talk'. Here 'l' is silent. Now say the silent letter in the following words aloud -walk more wrap joke• All the following words have an 'i' sound that rhymes with 'my'. Can you fill in the letter and then say the words aloud?sm_le, k_te, m_ce, l_ne

Answer»

1	2	3	4
trunk	sink	wrinkle	worry
sunk	think	wriggle	work
junk	pink	write	wonderful

• When we read 'w' in column 3 it has no sound.

• Look at the word 'talk'. Here 'l' is silent. Now say the silent letter in the following words aloud -

walk more wrap joke

• All the following words have an 'i' sound that rhymes with 'my'. Can you fill in the letter and then say the words aloud?

sm_le, k_te, m_ce, l_ne

Discussion

313.	Why does gravity only attracts?
Answer» Why does gravity only attracts?

Discussion

314.	When a light ray hits an object, the light reflects and the ray reflected is called reflected ray. When the reflected ray hits another object,whether it is a reflected ray or an incident ray?
Answer» When a light ray hits an object, the light reflects and the ray reflected is called reflected ray. When the reflected ray hits another object,whether it is a reflected ray or an incident ray?

Discussion

315.	147. A Carnot engine working as a refrigerator between250 K and 300 K receives 500 cal of heat from thecold reservoir. Heat rejected by it to the hotreservoir is(1) 400 cal(2) 450 cal(3) 550 cal(4) 600 cal
Answer» 147. A Carnot engine working as a refrigerator between 250 K and 300 K receives 500 cal of heat from the cold reservoir. Heat rejected by it to the hot reservoir is (1) 400 cal (2) 450 cal (3) 550 cal (4) 600 cal

Discussion

316.	Which of the following quantities specify the force acting on an object?
Answer» Which of the following quantities specify the force acting on an object?

Discussion

317.	Which thermometer is used to measure the extreme temperatures of the day reported in a newspaper?
Answer» Which thermometer is used to measure the extreme temperatures of the day reported in a newspaper?

Discussion

318.	A loader applied 150 N of force to lift a stone and 1250 J of work was done by it. How far was the rock lifted during the application of force?
Answer» A loader applied $150 N$ of force to lift a stone and $1250 J$ of work was done by it. How far was the rock lifted during the application of force?

Discussion

319.	Force constant of a spring is K. If one fourth part is detach then force constant of remaining spring will be :- (1) 3/4K (2) 4/3K (3) K (4) 4K
Answer» Force constant of a spring is K. If one fourth part is detach then force constant of remaining spring will be :- (1) 3/4K (2) 4/3K (3) K (4) 4K

Discussion

320.	62. A particle moves along the x-direction with constant acceleration. The displacement, measured from a convenient position, is 2m at time t=0 and is zero when t=10 s. If the velocity of the particle is momentary zero when t=6s,determine the acceleration a and the velocity v when t=10 s.
Answer» 62. A particle moves along the x-direction with constant acceleration. The displacement, measured from a convenient position, is 2m at time t=0 and is zero when t=10 s. If the velocity of the particle is momentary zero when t=6s,determine the acceleration a and the velocity v when t=10 s.

Discussion

321.	Can we eliminate systematic errors completely?
Answer» Can we eliminate systematic errors completely?

Discussion

322.	Two blocks of mass 3kg and 2kg are in contact with each other on a frictionless table. Find the force exerted by the smaller block on bigger block if a force of 5N is applied on bigger block.
Answer» Two blocks of mass 3kg and 2kg are in contact with each other on a frictionless table. Find the force exerted by the smaller block on bigger block if a force of 5N is applied on bigger block.

Discussion

323.	State the laws of reflection.
Answer» State the laws of reflection.

Discussion

324.	Two equal point charges A and B are R distance apart. An equal third charge is placed on the perpendicular bisector at a distance d from the centre will experience maximum electrostatic force when
Answer» Two equal point charges $A$ and $B$ are $R$ distance apart. An equal third charge is placed on the perpendicular bisector at a distance $d$ from the centre will experience maximum electrostatic force when

Discussion

325.	If the metal clip used in the electroscope is replaced by an ebonite rod and a charged body is brought in contact with it, will there be any effect on the aluminium strips? Explain.
Answer» If the metal clip used in the electroscope is replaced by an ebonite rod and a charged body is brought in contact with it, will there be any effect on the aluminium strips? Explain.

Discussion

326.	Which of the following statements about circumpolar stars is true at all latitudes?
Answer» Which of the following statements about circumpolar stars is true at all latitudes?

Discussion

327.	What is the special name of frictional force exerted by fluids (like air or water)?
Answer» What is the special name of frictional force exerted by fluids (like air or water)?

Discussion

328.	8.The minimum no. of NAND gates used to construct an OR gate is a)4 b)6 c)5 d)3 e)2
Answer» 8.The minimum no. of NAND gates used to construct an OR gate is a)4 b)6 c)5 d)3 e)2

Discussion

329.	Car A is moving with a speed of 36 Kmh^{-1} on a two lane road.Two cars B and C, each moving with a speed of 54 Kmh^{-1} in opposite direction on the other lane are approaching car A.At a certain ins†an t when the dis†an ce AB=dis†an ce AC=1 Km, the driver of car B decides to overtake A before C does. What must be minimum acceleration of car B so as to avoid an accident?
Answer» Car A is moving with a speed of 36 Kmh^{-1} on a two lane road.Two cars B and C, each moving with a speed of 54 Kmh^{-1} in opposite direction on the other lane are approaching car A.At a certain ins†an t when the dis†an ce AB=dis†an ce AC=1 Km, the driver of car B decides to overtake A before C does. What must be minimum acceleration of car B so as to avoid an accident?

Discussion

330.	What happens to the size of the pupil of our eye in dim light?
Answer» What happens to the size of the pupil of our eye in dim light?

Discussion

331.	Question 3 Sun appears to move from east to west around the earth. This means that earth rotates from (a) east to west (b) west to east (c) north to south (d) west to north
Answer» Question 3 Sun appears to move from east to west around the earth. This means that earth rotates from (a) east to west (b) west to east (c) north to south (d) west to north

Discussion

332.	What is the most noteworthy difference between V – 22 and a standard airplane?
Answer» What is the most noteworthy difference between V – 22 and a standard airplane?

Discussion

333.	Explain why, it might be dangerous to raise an umbrella over our head in a thunderstorm.
Answer» Explain why, it might be dangerous to raise an umbrella over our head in a thunderstorm.

Discussion

334.	The fricional force exerted by a fluid is called
Answer» The fricional force exerted by a fluid is called

Discussion

335.	Explain how does the sound produced by a vibrating object in a medium reach our ears?
Answer» Explain how does the sound produced by a vibrating object in a medium reach our ears?

Discussion

336.	Three beakers 1, 2 and 3 of different shapes are kept on a horizontal table and filled with water up to the same height h. If the pressure at the base of beakers are P1, P2 and P3 respectively, which of the following is the correct relation between them?
Answer» Three beakers 1, 2 and 3 of different shapes are kept on a horizontal table and filled with water up to the same height h. If the pressure at the base of beakers are $P_{1}$ , $P_{2}$ and $P_{3}$ respectively, which of the following is the correct relation between them?

Discussion

337.	a certain current liberates 0.5 g of hydrogen in 2 hours. how many grams of copper can be liberated by the same current flowing for the same time in a copper sulphate solution
Answer» a certain current liberates 0.5 g of hydrogen in 2 hours. how many grams of copper can be liberated by the same current flowing for the same time in a copper sulphate solution

Discussion

338.	6.The excess pressure inside a soap bubble is twice the excess pressure inside a 2nd soap bubble. The volume of the soap bubble is n times the volume of the 2nd, where n is 1) 4 2) 2 3) 1 4) 0.125
Answer» 6.The excess pressure inside a soap bubble is twice the excess pressure inside a 2nd soap bubble. The volume of the soap bubble is n times the volume of the 2nd, where n is 1) 4 2) 2 3) 1 4) 0.125

Discussion

339.	Gravitational force is the eakest force in nature.Explain
Answer» Gravitational force is the eakest force in nature.Explain

Discussion

340.	Deposition of the metal takes place on which electrode during electroplating?
Answer» Deposition of the metal takes place on which electrode during electroplating?

Discussion

341.	Who was the first one to say that our earth is round in shape?
Answer» Who was the first one to say that our earth is round in shape?

Discussion

342.	A coil in the shape of an equilateral triangle of side l is suspended between the pole pieces of a permanent magnet such that B is in plane of the coil. If due to a current i in the triangle a torque  acts on it, the side l of the triangle is
Answer» A coil in the shape of an equilateral triangle of side l is suspended between the pole pieces of a permanent magnet such that B is in plane of the coil. If due to a current i in the triangle a torque  acts on it, the side l of the triangle is

Discussion

343.	Which among these is incorrect?
Answer» Which among these is incorrect?

Discussion

344.	There is no oxygen on sun(if I am not mistaken).So,how does the hydrogen present on sun burn to give out heat and light?
Answer» There is no oxygen on sun(if I am not mistaken).So,how does the hydrogen present on sun burn to give out heat and light?

Discussion

345.	Plowing effect as a cause for friction can be understood in which of the following cases?
Answer» Plowing effect as a cause for friction can be understood in which of the following cases?

Discussion

346.	_________ is a device which converts electrical energy into mechanical energy.
Answer» _________ is a device which converts electrical energy into mechanical energy.

Discussion

347.	Why tension is an Electromagnetic force ?
Answer» Why tension is an Electromagnetic force ?

Discussion

348.	Run a comb through dry hair and bring it near some small bits of paper. What will you notice?
Answer» Run a comb through dry hair and bring it near some small bits of paper. What will you notice?

Discussion

349.	A battery is rated 12 V. Calculate the amount of energy that has to be spent by the battery to discharge 1.2 x 1040 electrons in a circuit.
Answer» A battery is rated 12 V. Calculate the amount of energy that has to be spent by the battery to discharge 1.2 x 1040 electrons in a circuit.

Discussion

350.	A train 200m long travelling at 80m/s overtakes another train 400m long travelling at 30m/s. How much time is taken by the first train to pass the second train?
Answer» A train 200m long travelling at 80m/s overtakes another train 400m long travelling at 30m/s. How much time is taken by the first train to pass the second train?

Discussion

Explore topic-wise InterviewSolutions in .

If 1st overtone of an open organ pipe has same frequency as that of 1st overtone of closed organ pipe then the ratio of their lengths is Options: a- 1 : 1 b-1 : 3 c- 4 : 3 d-2 : 3

Intermediate state of apparent expansion of ___cannot be observed.

How many moleculesof O2 are present in 1L air containing 80% volume of O2 at STP.

The upper half of an inclined plane of inclination theta is perfectly smooth while the lower half is rough . A body starting from the rest at top comes back to rest at the bottom if the coefficient of friction for the lower is given by

If friction does depend on the surface area of contact, what if both the surfaces have similar atomic irregularities. Would it change

two solid pieces one of steel and the other of aluminium when immersed completely in water have equal weights with the solid pieces

Change the sentence to indirect speech. The sole survivor of the earthquake sobbed, “I was trapped beneath the rubble for two days.”

Which among the following requires a medium for propagation?

When you are looking at the objects closer to the eye, the focal length of eye lens:

36.The rod of length l = 1m rotates with an angular velocity = 2rad/s and the Point P moves with velocity v =1m/s and accelration a = 1m/s. Find the velocity of Q.

14 two equal positive charges Q are fixed at points (a,0) and (-a,0) on the x-axis. An opposite charge -q at rest is released from the point (0,a) on the y-axis. The charge -qwilla) move to infinityb) move to originc) undergo SHM about the origind) execute oscillatory periodic motion but not SHM

Why does gravity only attracts?

When a light ray hits an object, the light reflects and the ray reflected is called reflected ray. When the reflected ray hits another object,whether it is a reflected ray or an incident ray?

147. A Carnot engine working as a refrigerator between250 K and 300 K receives 500 cal of heat from thecold reservoir. Heat rejected by it to the hotreservoir is(1) 400 cal(2) 450 cal(3) 550 cal(4) 600 cal

Which of the following quantities specify the force acting on an object?

Which thermometer is used to measure the extreme temperatures of the day reported in a newspaper?

A loader applied 150 N of force to lift a stone and 1250 J of work was done by it. How far was the rock lifted during the application of force?

Force constant of a spring is K. If one fourth part is detach then force constant of remaining spring will be :- (1) 3/4K (2) 4/3K (3) K (4) 4K

62. A particle moves along the x-direction with constant acceleration. The displacement, measured from a convenient position, is 2m at time t=0 and is zero when t=10 s. If the velocity of the particle is momentary zero when t=6s,determine the acceleration a and the velocity v when t=10 s.

Can we eliminate systematic errors completely?

Two blocks of mass 3kg and 2kg are in contact with each other on a frictionless table. Find the force exerted by the smaller block on bigger block if a force of 5N is applied on bigger block.

State the laws of reflection.

Two equal point charges A and B are R distance apart. An equal third charge is placed on the perpendicular bisector at a distance d from the centre will experience maximum electrostatic force when

If the metal clip used in the electroscope is replaced by an ebonite rod and a charged body is brought in contact with it, will there be any effect on the aluminium strips? Explain.

Which of the following statements about circumpolar stars is true at all latitudes?

What is the special name of frictional force exerted by fluids (like air or water)?

8.The minimum no. of NAND gates used to construct an OR gate is a)4 b)6 c)5 d)3 e)2

What happens to the size of the pupil of our eye in dim light?

Question 3 Sun appears to move from east to west around the earth. This means that earth rotates from (a) east to west (b) west to east (c) north to south (d) west to north

What is the most noteworthy difference between V – 22 and a standard airplane?

Explain why, it might be dangerous to raise an umbrella over our head in a thunderstorm.

The fricional force exerted by a fluid is called

Explain how does the sound produced by a vibrating object in a medium reach our ears?

Three beakers 1, 2 and 3 of different shapes are kept on a horizontal table and filled with water up to the same height h. If the pressure at the base of beakers are P1, P2 and P3 respectively, which of the following is the correct relation between them?

a certain current liberates 0.5 g of hydrogen in 2 hours. how many grams of copper can be liberated by the same current flowing for the same time in a copper sulphate solution

6.The excess pressure inside a soap bubble is twice the excess pressure inside a 2nd soap bubble. The volume of the soap bubble is n times the volume of the 2nd, where n is 1) 4 2) 2 3) 1 4) 0.125

Gravitational force is the eakest force in nature.Explain

Deposition of the metal takes place on which electrode during electroplating?

Who was the first one to say that our earth is round in shape?

A coil in the shape of an equilateral triangle of side l is suspended between the pole pieces of a permanent magnet such that B is in plane of the coil. If due to a current i in the triangle a torque  acts on it, the side l of the triangle is

Which among these is incorrect?

There is no oxygen on sun(if I am not mistaken).So,how does the hydrogen present on sun burn to give out heat and light?

Plowing effect as a cause for friction can be understood in which of the following cases?

_________ is a device which converts electrical energy into mechanical energy.

Why tension is an Electromagnetic force ?

Run a comb through dry hair and bring it near some small bits of paper. What will you notice?

A battery is rated 12 V. Calculate the amount of energy that has to be spent by the battery to discharge 1.2 x 1040 electrons in a circuit.

A train 200m long travelling at 80m/s overtakes another train 400m long travelling at 30m/s. How much time is taken by the first train to pass the second train?