13232 + Interview Questions in Physics Page 107 InterviewSolution

5301.	a pin of mass mjust floats on water surface in a container of base length l.find \varnothing.(angle of contact
Answer» a pin of mass mjust floats on water surface in a container of base length l.find \varnothing.(angle of contact

Discussion

5302.	The Astronomical Unit (AU) is a unit of measurement based on the average distance between what two bodies?
Answer» The Astronomical Unit (AU) is a unit of measurement based on the average distance between what two bodies?

Discussion

5303.	7. a boy measures the diameter of a small metal ball using a vernier calipers. he takes the following five readings 2.48 Cm,2.49 cm, 2.51cm , 2.50 CM, 2.51cm.find it's RAdius with the appropriate % error
Answer» 7. a boy measures the diameter of a small metal ball using a vernier calipers. he takes the following five readings 2.48 Cm,2.49 cm, 2.51cm , 2.50 CM, 2.51cm.find it's RAdius with the appropriate % error

Discussion

5304.	8.Two pistons of a Hydraulic Machines have diameter of 30.0 centimetre and 2.5 cm. what is the force xerted on the large piston when 40 kg wt is placed on the small piston ?if the smaller Piston moving through 6cm, how much does the other piston move out?
Answer» 8.Two pistons of a Hydraulic Machines have diameter of 30.0 centimetre and 2.5 cm. what is the force xerted on the large piston when 40 kg wt is placed on the small piston ?if the smaller Piston moving through 6cm, how much does the other piston move out?

Discussion

5305.	50 kJ of energy causes a displacement of 25 m in a body in the direction of force in 2.5 s. Find the power.
Answer» $50 kJ$ of energy causes a displacement of $25 m$ in a body in the direction of force in $2.5 s$ . Find the power.

Discussion

5306.	State which of the following situations are possible and give an example of each of these:- a body moving with constant acceleration but with zero velocity. A body moving horizontally with acceleration in vertical direction. A body moving with a constant speed in an accelerated motion.
Answer» State which of the following situations are possible and give an example of each of these:- a body moving with constant acceleration but with zero velocity. A body moving horizontally with acceleration in vertical direction. A body moving with a constant speed in an accelerated motion.

Discussion

5307.	When the switch S, in the circuit shown, is closed then the value of current i will be:
Answer» When the switch $S$ , in the circuit shown, is closed then the value of current $i$ will be:

Discussion

5308.	What are the units of density in (i) C.G.S. and (ii) S.I. system.
Answer» What are the units of density in (i) C.G.S. and (ii) S.I. system.

Discussion

5309.	90. What is the max value of velocity which tells us if we have to take PE as mgh or -GMm/R?
Answer» 90. What is the max value of velocity which tells us if we have to take PE as mgh or -GMm/R?

Discussion

5310.	After holding a pack of ice in your hand for some time, you put your hand in water at room temperature. Your hand would now feel ___.
Answer» After holding a pack of ice in your hand for some time, you put your hand in water at room temperature. Your hand would now feel ___.

Discussion

5311.	(a) Define power. Give the SI unit of power. (b) A boy weighing 40 kg carries a box weighing 20 kg to the top of a building 15 m high in 25 seconds. Calculate the power. (g = 10 m/s2)
Answer» (a) Define power. Give the SI unit of power. (b) A boy weighing 40 kg carries a box weighing 20 kg to the top of a building 15 m high in 25 seconds. Calculate the power. (g = 10 $m / s^{2}$ )

5311.

(a) Define power. Give the SI unit of power. (b) A boy weighing 40 kg carries a box weighing 20 kg to the top of a building 15 m high in 25 seconds. Calculate the power. (g = 10 m/s2)

Answer»

(a) Define power. Give the SI unit of power.

(b) A boy weighing 40 kg carries a box weighing 20 kg to the top of a building 15 m high in 25 seconds. Calculate the power. (g = 10 $m / s^{2}$ )

Discussion

5312.	The value of 'g' is minimum
Answer» The value of 'g' is minimum

Discussion

5313.	Young's modulus is the ratio of the logitudinal stress to___
Answer» Young's modulus is the ratio of the logitudinal stress to___

Discussion

5314.	{ A particle has initial velocity, }\vec v=(9^ i-6^ j)m/s and a }}{ constant force }\vec F=(2i+3j)N acts on the particle. }} The path of particle will be } (1) Straight line } (2) Parabolic } (3) Circular } (4) Elliptical
Answer» { A particle has initial velocity, }\vec v=(9^ i-6^ j)m/s and a }}{ constant force }\vec F=(2i+3j)N acts on the particle. }} The path of particle will be } (1) Straight line } (2) Parabolic } (3) Circular } (4) Elliptical

Discussion

5315.	A stone is allowed to fall from the top of a tower 100 m high at the same time another stone is projected vertically upward from the ground with a velocity of 25 m/s . Calculate when and where the two stones will meet ?(Take g=10m/s^2)
Answer» A stone is allowed to fall from the top of a tower 100 m high at the same time another stone is projected vertically upward from the ground with a velocity of 25 m/s . Calculate when and where the two stones will meet ?(Take g=10m/s^2)

Discussion

5316.

Match List I of the nuclear processes with List II containing parent nucleus and one of the end products of each process and then select the correct answer using the codes given below the lists: List I List IIp.Alpha decay1.158O→157N+....q.β+ decay2.23892U→23490Th+....r.Fission3.18583Bi→18482Pb+....s.Proton emission4.23994Pu→14057La+....

Answer»

Match List I of the nuclear processes with List II containing parent nucleus and one of the end products of each process and then select the correct answer using the codes given below the lists:

	List I		List II
$p .$	Alpha decay	$1.$	$_{8}^{15} O \to_{7}^{15} N + . . . .$
$q .$	$β^{+}$ decay	$2.$	$_{92}^{238} U \to_{90}^{234} T h + . . . .$
$r .$	Fission	$3.$	$_{83}^{185} B i \to_{82}^{184} P b + . . . .$
$s .$	Proton emission	$4.$	$_{94}^{239} P u \to_{57}^{140} L a + . . . .$

Discussion

5317.	A uniform circular disc of radius a is taken. A circular portion of radius b has been removed from it as shown in the figure. If the centre of hole is at a distance c from the centre of the disc, the distance x2 of the centre of mass of the remaining part from the initial centre of mass O is given by
Answer» A uniform circular disc of radius $a$ is taken. A circular portion of radius $b$ has been removed from it as shown in the figure. If the centre of hole is at a distance $c$ from the centre of the disc, the distance $x_{2}$ of the centre of mass of the remaining part from the initial centre of mass $O$ is given by

Discussion

5318.	What is the relation between mass and weight?
Answer» What is the relation between mass and weight?

Discussion

5319.	A 20 cm long capillary tube is dipped in the water.The water rises upto 8cm. If the entire arrangement is put in a freely falling elevator,the the length of the water column capillary tube will be?
Answer» A 20 cm long capillary tube is dipped in the water.The water rises upto 8cm. If the entire arrangement is put in a freely falling elevator,the the length of the water column capillary tube will be?

Discussion

5320.	What is the maximum audible frequency for children under the age of 5?
Answer» What is the maximum audible frequency for children under the age of 5?

Discussion

5321.	Why do you think Wordsworth has chosen the song of the nightingale and the cuckoo for comparison with the solitary reaper’s song?
Answer» Why do you think Wordsworth has chosen the song of the nightingale and the cuckoo for comparison with the solitary reaper’s song?

Discussion

5322.	How can we find the net force acting on a body?
Answer» How can we find the net force acting on a body?

Discussion

5323.	Statement I: Nuclear fission is a spontaneous process i.e. there is no need for external energy supply for this to happen. Statement II: In a nuclear fission reaction the rest mass energy of the parent nucleus is more than the combined rest mass energy of two daughter fragments and neutrons.
Answer» Statement I: Nuclear fission is a spontaneous process i.e. there is no need for external energy supply for this to happen. Statement II: In a nuclear fission reaction the rest mass energy of the parent nucleus is more than the combined rest mass energy of two daughter fragments and neutrons.

Discussion

5324.	The distance between the maximum and the adjacent minimum displacement in a wave is 5 cm what is the wavelength of the wave
Answer» The distance between the maximum and the adjacent minimum displacement in a wave is 5 cm what is the wavelength of the wave

Discussion

5325.	A truck moves at 36 kmh−1. It increases its velocity to 90 kmh−1 in 0.1 minute.What is the acceleration of the truck?
Answer» A truck moves at $36 k m h^{- 1}$ . It increases its velocity to $90 k m h^{- 1}$ in $0.1 m i n u t e$ . What is the acceleration of the truck?

5325.

A truck moves at 36 kmh−1. It increases its velocity to 90 kmh−1 in 0.1 minute.What is the acceleration of the truck?

Answer»

A truck moves at $36 k m h^{- 1}$ . It increases its velocity to $90 k m h^{- 1}$ in $0.1 m i n u t e$ .

What is the acceleration of the truck?

Discussion

5326.	5. A uniform tube closed at one end contains a pellet of Mercury 10 cm long .when the tube is vertical with the closed end on top the length of air column above Mercury pellet is 20 cm. find the length of air column in the tube below the Mercury pellet when the tube is inverted with the closed end at the bottom. the atmospheric pressure is given to be 75 cm of Mercury Click here to view details:
Answer» 5. A uniform tube closed at one end contains a pellet of Mercury 10 cm long .when the tube is vertical with the closed end on top the length of air column above Mercury pellet is 20 cm. find the length of air column in the tube below the Mercury pellet when the tube is inverted with the closed end at the bottom. the atmospheric pressure is given to be 75 cm of Mercury Click here to view details:

Discussion

5327.	Which of the following shows the correct depiction of a circuit diagram?
Answer» Which of the following shows the correct depiction of a circuit diagram?

5327.

Which of the following shows the correct depiction of a circuit diagram?

Answer»

Which of the following shows the correct depiction of a circuit diagram?

Discussion

5328.	Derive equation for potential energy. [3 MARKS]
Answer» Derive equation for potential energy. [3 MARKS]

Discussion

5329.	63. an object is projected from ground with speed u at angle theta with horizontal the radius of curvature of its trajectory at maximum height from the ground is
Answer» 63. an object is projected from ground with speed u at angle theta with horizontal the radius of curvature of its trajectory at maximum height from the ground is

Discussion

5330.	What is the literal meaning of acceleration
Answer» What is the literal meaning of acceleration

Discussion

5331.	Why mirror has no power like lens?
Answer» Why mirror has no power like lens?

Discussion

5332.	Two masses 4 g and 12 g, are placed horizontally at a distance of 12 cm from each other. Another mass of 0.5 g is placed in between them such that there is no net force acting on it. Find the distance (in cm) of the third mass from the mass of 4 g.
Answer» Two masses $4 g$ and $12 g$ , are placed horizontally at a distance of $12 cm$ from each other. Another mass of $0.5 g$ is placed in between them such that there is no net force acting on it. Find the distance (in $cm$ ) of the third mass from the mass of $4 g$ .

Discussion

5333.	A 40 kg girl is running along a circular path. How much work is done by the Girl in completing one circle
Answer» A 40 kg girl is running along a circular path. How much work is done by the Girl in completing one circle

Discussion

5334.	A Galilean telescope has an objective of focal length 100 cm and magnifying power 50. The distance between the two lenses in normal adjustment will be -
Answer» A Galilean telescope has an objective of focal length $100 cm$ and magnifying power $50$ . The distance between the two lenses in normal adjustment will be -

Discussion

5335.	four particles enter a region of uniform magnetic field their trajectories shown in figure what are the find out the charge of all four particles
Answer» four particles enter a region of uniform magnetic field their trajectories shown in figure what are the find out the charge of all four particles

Discussion

5336.	The four major moons of the planet Jupiter were discovered by:
Answer» The four major moons of the planet $Jupiter$ were discovered by:

Discussion

5337.	Equivalent resistance between the points A and B is (in Ω)
Answer» Equivalent resistance between the points $A$ and $B$ is (in $Ω$ )

Discussion

5338.	A porter lifts a heavy suitcase of mass 80 kg and at the destination lowers it down by a distance of 80 cm with a constant velocity. Calculate the work done by the porter in lowering the suitcase. (take g=9.8 ms–2)
Answer» A porter lifts a heavy suitcase of mass $80 kg$ and at the destination lowers it down by a distance of $80 cm$ with a constant velocity. Calculate the work done by the porter in lowering the suitcase. $(take g = 9.8 {ms}^{- 2})$

Discussion

5339.	What is the work done in moving a charge of 0.4 C across two points having a potential difference of 8 V?
Answer» What is the work done in moving a charge of 0.4 C across two points having a potential difference of 8 V?

Discussion

5340.	<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->Consider the following in context of Kepler's Law:1. Planets sweep equal areas in equal times while orbiting Sun.2. Planets appear to move slower when they are farther from the sun than when they are nearer.3.The orbital period squared is proportional to the size of the semi-major axis cubed.Select the correct statements:
Answer» <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Consider the following in context of Kepler's Law: 1. Planets sweep equal areas in equal times while orbiting Sun. 2. Planets appear to move slower when they are farther from the sun than when they are nearer. 3.The orbital period squared is proportional to the size of the semi-major axis cubed. Select the correct statements:

Discussion

5341.	Carry- over factor CAB for the beam as shown in the figure below is
Answer» Carry- over factor $C_{A B}$ for the beam as shown in the figure below is

Discussion

5342.	On the Celsius scale the absolute zero of temperature is at
Answer» On the Celsius scale the absolute zero of temperature is at

Discussion

5343.	For CE transistor amplifier, the audio signal voltage across the collector resistance of 2 kΩ is 4 V. If the current amplification factor of the transistor is 100 and the base resistance is 1 kΩ, then the input signal voltage is
Answer» For CE transistor amplifier, the audio signal voltage across the collector resistance of $2 k Ω$ is $4 V$ . If the current amplification factor of the transistor is $100$ and the base resistance is $1 k Ω$ , then the input signal voltage is

Discussion

5344.	Question 1 You find your mass to be 42 kg on a weighing machine. Is your mass more or less than 42 kg?
Answer» Question 1 You find your mass to be 42 kg on a weighing machine. Is your mass more or less than 42 kg?

Discussion

5345.	Assam produces 40 compressions and 40 rarefactions in 0.4 seconds. what is the frequency of the wave?
Answer» Assam produces 40 compressions and 40 rarefactions in 0.4 seconds. what is the frequency of the wave?

Discussion

5346.	Electric current will stop flowing when the potential difference is:
Answer» Electric current will stop flowing when the potential difference is:

Discussion

5347.	The volume of 100g of a substance is 20cm3. If the density of water is 1 gcm−3, then the substance will sink in water.
Answer» The volume of 100g of a substance is $20 c m^{3}$ . If the density of water is 1 $g c m^{- 3}$ , then the substance will sink in water.

Discussion

5348.	Two metallic sphere of mass M are suspended by two strings each of length L. The dis†an ce between the upper ends of strings is L. The angle which the strings will make with the vertical due to mutual attraction sphere is (if each mass horizontally moved by a dis†an ce of L/4 due to mutual attraction)
Answer» Two metallic sphere of mass M are suspended by two strings each of length L. The dis†an ce between the upper ends of strings is L. The angle which the strings will make with the vertical due to mutual attraction sphere is (if each mass horizontally moved by a dis†an ce of L/4 due to mutual attraction)

Discussion

5349.	where should a real object be placed in front of a concave lens having focal length10 cm to be obtain an image of magniification 1/2
Answer» where should a real object be placed in front of a concave lens having focal length10 cm to be obtain an image of magniification 1/2

Discussion

5350.	S1: Hungary, with a population of about 10 million, lies between Czechoslovakia to the north and Yugoslavia to the south. P. Here a great deal of grain is grown. Q. In recent years, however, progress has been made also in the field of industrialisation. R. Most of this country consists of an extremely fertile plain, through which the river Danube flows. S. In addition to grain, the plain produces potatoes, sugar, wine and livestock. S6: The new industries derive mainly from agricultural production. __
Answer» S1: Hungary, with a population of about 10 million, lies between Czechoslovakia to the north and Yugoslavia to the south. P. Here a great deal of grain is grown. Q. In recent years, however, progress has been made also in the field of industrialisation. R. Most of this country consists of an extremely fertile plain, through which the river Danube flows. S. In addition to grain, the plain produces potatoes, sugar, wine and livestock. S6: The new industries derive mainly from agricultural production. __

Discussion

Explore topic-wise InterviewSolutions in .

a pin of mass mjust floats on water surface in a container of base length l.find \varnothing.(angle of contact

The Astronomical Unit (AU) is a unit of measurement based on the average distance between what two bodies?

7. a boy measures the diameter of a small metal ball using a vernier calipers. he takes the following five readings 2.48 Cm,2.49 cm, 2.51cm , 2.50 CM, 2.51cm.find it's RAdius with the appropriate % error

8.Two pistons of a Hydraulic Machines have diameter of 30.0 centimetre and 2.5 cm. what is the force xerted on the large piston when 40 kg wt is placed on the small piston ?if the smaller Piston moving through 6cm, how much does the other piston move out?

50 kJ of energy causes a displacement of 25 m in a body in the direction of force in 2.5 s. Find the power.

State which of the following situations are possible and give an example of each of these:- a body moving with constant acceleration but with zero velocity. A body moving horizontally with acceleration in vertical direction. A body moving with a constant speed in an accelerated motion.

When the switch S, in the circuit shown, is closed then the value of current i will be:

What are the units of density in (i) C.G.S. and (ii) S.I. system.

90. What is the max value of velocity which tells us if we have to take PE as mgh or -GMm/R?

After holding a pack of ice in your hand for some time, you put your hand in water at room temperature. Your hand would now feel ___.

(a) Define power. Give the SI unit of power. (b) A boy weighing 40 kg carries a box weighing 20 kg to the top of a building 15 m high in 25 seconds. Calculate the power. (g = 10 m/s2)

The value of 'g' is minimum

Young's modulus is the ratio of the logitudinal stress to___

{ A particle has initial velocity, }\vec v=(9^ i-6^ j)m/s and a }}{ constant force }\vec F=(2i+3j)N acts on the particle. }} The path of particle will be } (1) Straight line } (2) Parabolic } (3) Circular } (4) Elliptical

A stone is allowed to fall from the top of a tower 100 m high at the same time another stone is projected vertically upward from the ground with a velocity of 25 m/s . Calculate when and where the two stones will meet ?(Take g=10m/s^2)

What is the relation between mass and weight?

A 20 cm long capillary tube is dipped in the water.The water rises upto 8cm. If the entire arrangement is put in a freely falling elevator,the the length of the water column capillary tube will be?

What is the maximum audible frequency for children under the age of 5?

Why do you think Wordsworth has chosen the song of the nightingale and the cuckoo for comparison with the solitary reaper’s song?

How can we find the net force acting on a body?

Statement I: Nuclear fission is a spontaneous process i.e. there is no need for external energy supply for this to happen. Statement II: In a nuclear fission reaction the rest mass energy of the parent nucleus is more than the combined rest mass energy of two daughter fragments and neutrons.

The distance between the maximum and the adjacent minimum displacement in a wave is 5 cm what is the wavelength of the wave

A truck moves at 36 kmh−1. It increases its velocity to 90 kmh−1 in 0.1 minute.What is the acceleration of the truck?

Which of the following shows the correct depiction of a circuit diagram?

Derive equation for potential energy. [3 MARKS]

63. an object is projected from ground with speed u at angle theta with horizontal the radius of curvature of its trajectory at maximum height from the ground is

What is the literal meaning of acceleration

Why mirror has no power like lens?

Two masses 4 g and 12 g, are placed horizontally at a distance of 12 cm from each other. Another mass of 0.5 g is placed in between them such that there is no net force acting on it. Find the distance (in cm) of the third mass from the mass of 4 g.

A 40 kg girl is running along a circular path. How much work is done by the Girl in completing one circle

A Galilean telescope has an objective of focal length 100 cm and magnifying power 50. The distance between the two lenses in normal adjustment will be -

four particles enter a region of uniform magnetic field their trajectories shown in figure what are the find out the charge of all four particles

The four major moons of the planet Jupiter were discovered by:

Equivalent resistance between the points A and B is (in Ω)

A porter lifts a heavy suitcase of mass 80 kg and at the destination lowers it down by a distance of 80 cm with a constant velocity. Calculate the work done by the porter in lowering the suitcase. (take g=9.8 ms–2)

What is the work done in moving a charge of 0.4 C across two points having a potential difference of 8 V?

Carry- over factor CAB for the beam as shown in the figure below is

On the Celsius scale the absolute zero of temperature is at

For CE transistor amplifier, the audio signal voltage across the collector resistance of 2 kΩ is 4 V. If the current amplification factor of the transistor is 100 and the base resistance is 1 kΩ, then the input signal voltage is

Question 1 You find your mass to be 42 kg on a weighing machine. Is your mass more or less than 42 kg?

Assam produces 40 compressions and 40 rarefactions in 0.4 seconds. what is the frequency of the wave?

Electric current will stop flowing when the potential difference is:

The volume of 100g of a substance is 20cm3. If the density of water is 1 gcm−3, then the substance will sink in water.

where should a real object be placed in front of a concave lens having focal length10 cm to be obtain an image of magniification 1/2