9478 + Interview Questions in Physics Page 48 InterviewSolution

2351.	63. Is there any edge of universe?
Answer» 63. Is there any edge of universe?

Discussion

2352.	The inter-molecular force is maximum in :
Answer» The inter-molecular force is maximum in :

Discussion

2353.	Explain the following : (a) A coin placed at the bottom of a vessel appears to be raised when water is poured in the vessel. (b) A straight stick partly dipped in water obliquely, appears to be bent at the surface of water. (c) The sun is seen before the sunrise and after the sunset.
Answer» Explain the following : (a) A coin placed at the bottom of a vessel appears to be raised when water is poured in the vessel. (b) A straight stick partly dipped in water obliquely, appears to be bent at the surface of water. (c) The sun is seen before the sunrise and after the sunset.

2353.

Explain the following : (a) A coin placed at the bottom of a vessel appears to be raised when water is poured in the vessel. (b) A straight stick partly dipped in water obliquely, appears to be bent at the surface of water. (c) The sun is seen before the sunrise and after the sunset.

Answer»

Explain the following :

(a) A coin placed at the bottom of a vessel appears to be raised when water is poured in the vessel.

(b) A straight stick partly dipped in water obliquely, appears to be bent at the surface of water.

(c) The sun is seen before the sunrise and after the sunset.

Discussion

2354.	Question 06.3 Fill in the blanks in the following.The size of the pupil becomes ________ when you see in dim light.
Answer» Question 06.3 Fill in the blanks in the following. The size of the pupil becomes ________ when you see in dim light.

Discussion

2355.	How do bats see?
Answer» How do bats see?

Discussion

2356.	How can we neutralize a charged electroscope?
Answer» How can we neutralize a charged electroscope?

Discussion

2357.	Name some effective safety measures against cyclone?
Answer» Name some effective safety measures against cyclone?

Discussion

2358.	What will you observe when the metal top of an electroscope is touched with a plastic comb rubbed in dry hair ? Give reason for your answer.
Answer» What will you observe when the metal top of an electroscope is touched with a plastic comb rubbed in dry hair ? Give reason for your answer.

Discussion

2359.	Has the poet used exaggeration for special effect? Find a few examples of it and read those lines aloud.
Answer» Has the poet used exaggeration for special effect? Find a few examples of it and read those lines aloud.

Discussion

2360.	A force of 100 N is applied on an area of 5 m2. Compute the pressure being applied to the area.
Answer» A force of 100 N is applied on an area of $5 m^{2}$ . Compute the pressure being applied to the area.

Discussion

2361.	Why cannot a sound be heard on the moon? How do astronauts talk to one another on the surface of the moon?
Answer» Why cannot a sound be heard on the moon? How do astronauts talk to one another on the surface of the moon?

Discussion

2362.	The splitting of white light into seven colours is known as ___.
Answer» The splitting of white light into seven colours is known as ___.

Discussion

2363.	128.A wedge with mass M rests on frictionless horizontal surface . A block with mass m is placed on the wedge . There is no friction between the block and wedge. A horizontal force F is applied to the wedge . What magnitude F must have if block is to remain at constant height above the table top ??
Answer» 128.A wedge with mass M rests on frictionless horizontal surface . A block with mass m is placed on the wedge . There is no friction between the block and wedge. A horizontal force F is applied to the wedge . What magnitude F must have if block is to remain at constant height above the table top ??

Discussion

2364.	A sample of Ideal Gas (Gamma=1.4) is heated at constant pressure.If heat of 140 J is supplied,what will be W?
Answer» A sample of Ideal Gas (Gamma=1.4) is heated at constant pressure.If heat of 140 J is supplied,what will be W?

Discussion

2365.	State some precautions to be taken while measuring length with the help of a metre scale.
Answer» State some precautions to be taken while measuring length with the help of a metre scale.

Discussion

2366.	How do the lightning occurs in atmosphere
Answer» How do the lightning occurs in atmosphere

Discussion

2367.	Question 7Choose the correct statement of the following(a) conversion of solid into vapours without passing through the liquid state is called vapourisation.(b) conversion of vapours into solid without passing through the liquid state is called deposition.(c) conversion of vapours into solid without passing through the liquid state is called freezing.(d) conversion of solid into liquid is called sublimation.
Answer» Question 7 Choose the correct statement of the following (a) conversion of solid into vapours without passing through the liquid state is called vapourisation. (b) conversion of vapours into solid without passing through the liquid state is called deposition. (c) conversion of vapours into solid without passing through the liquid state is called freezing. (d) conversion of solid into liquid is called sublimation.

Discussion

2368.	What is electroplating? Give examples.
Answer» What is electroplating? Give examples.

Discussion

2369.	A cannon ball of mass 2 kg is fired at a target 500 m away. The 400 kg cannon recoils with a velocity of 2 ms−1. Assuming cannon ball moves with constant velocity, when does it hit the target?
Answer» A cannon ball of mass $2 k g$ is fired at a target $500 m$ away. The $400 k g$ cannon recoils with a velocity of $2 m s^{- 1}$ . Assuming cannon ball moves with constant velocity, when does it hit the target?

Discussion

2370.	A block is placed over a table. . In which of the given case(s) the block will move to the east direction, if the force applied on it has been shown by arrows?
Answer» A block is placed over a table. . In which of the given case(s) the block will move to the east direction, if the force applied on it has been shown by arrows?

Discussion

2371.	13.A body is moving with an initial velocity of u m/s and acceleration of 4 m/s sq.If it cover 20 m in 2 sec. , then find the value of u. Option 1. 14m/s 2 41 m/s 3.5 m/s 4.10 m/s
Answer» 13.A body is moving with an initial velocity of u m/s and acceleration of 4 m/s sq.If it cover 20 m in 2 sec. , then find the value of u. Option 1. 14m/s 2 41 m/s 3.5 m/s 4.10 m/s

Discussion

2372.	Which of the following measurements is most accurate? Options 2.00 m 2.0 m 2 m 20.00 m
Answer» Which of the following measurements is most accurate? Options 2.00 m 2.0 m 2 m 20.00 m

Discussion

2373.	Which of the following materials resist the flow of electron the most?
Answer» Which of the following materials resist the flow of electron the most?

Discussion

2374.	Define force. State its S.I. unit.
Answer» Define force. State its S.I. unit.

Discussion

2375.	Incident light falling on the surface is sent back into the same medium is an example of ___.
Answer» Incident light falling on the surface is sent back into the same medium is an example of ___.

Discussion

2376.	A particle is moving in x-y plane as x=at and y=at - abt^2 where a and b are constants and t is time. What is the equation of path of particle?
Answer» A particle is moving in x-y plane as x=at and y=at - abt^2 where a and b are constants and t is time. What is the equation of path of particle?

Discussion

2377.	A body is floating in water. 1/3rd of the body is inside the water and 2/3rd is in the air as shown in the figure. Find out the density of the body. ρw=Density of waterρb=Density of the body
Answer» A body is floating in water. $1 / 3^{rd}$ of the body is inside the water and $2 / 3^{rd}$ is in the air as shown in the figure. Find out the density of the body. $ρ_{w} = Density of water$ $ρ_{b} = Density of the body$

Discussion

2378.	In which of the following examples chemical effects of electric current is desirable?
Answer» In which of the following examples chemical effects of electric current is desirable?

Discussion

2379.	How is a spherical mirror used to converge a beam of light at a point ? Name the type of mirror used.
Answer» How is a spherical mirror used to converge a beam of light at a point ? Name the type of mirror used.

Discussion

2380.	A stone of mass 7 kg is dropped from a height of 5 m. Calculate the linear momentum of the stone when it reaches the ground.Take g=10 m/s2
Answer» A stone of mass $7 kg$ is dropped from a height of $5 m$ . Calculate the linear momentum of the stone when it reaches the ground. Take $g = 10 {m/s}^{2}$

Discussion

2381.	Which is higher–the atmospheric pressure at Mumbai or the atmospheric pressure on top of Mt Everest? Give reasons.
Answer» Which is higher–the atmospheric pressure at Mumbai or the atmospheric pressure on top of Mt Everest? Give reasons.

Discussion

2382.	___________ is the part of space that exists between stars or celestial bodies.
Answer» ___________ is the part of space that exists between stars or celestial bodies.

Discussion

2383.	A object changing its position with respect to a reference body with time is ____ with respect to the body.
Answer» A object changing its position with respect to a reference body with time is ____ with respect to the body.

Discussion

2384.	Calculate the work required to be done to stop a car of 1500 kg moving at a velocity of 72 kmph?
Answer» Calculate the work required to be done to stop a car of $1500 k g$ moving at a velocity of $72 k m p h$ ?

Discussion

2385.	What is the approximate value of 1 radian in degree measure?
Answer» What is the approximate value of 1 radian in degree measure?

Discussion

2386.	The distance between plates of a parallel plate capacitor is 5d. Let the positively charged plate is at x=0 and negatively charged plate is at x=5d. Two slabs, one of conductor and the other of a dielectric of equal thickness d are inserted between the plates as shown in figure. Potential versus distance graph will look like:
Answer» The distance between plates of a parallel plate capacitor is $5 d$ . Let the positively charged plate is at $x = 0$ and negatively charged plate is at $x = 5 d$ . Two slabs, one of conductor and the other of a dielectric of equal thickness $d$ are inserted between the plates as shown in figure. Potential versus distance graph will look like:

Discussion

2387.	Electric field intensity due to linear charge distribution at broad on position?
Answer» Electric field intensity due to linear charge distribution at broad on position?

Discussion

2388.	the ratio of intensities betwen two coherent sound sources is 4:1.the difference of loudness in dB between maximum and minimum intensities when they interfere in the space is
Answer» the ratio of intensities betwen two coherent sound sources is 4:1.the difference of loudness in dB between maximum and minimum intensities when they interfere in the space is

Discussion

2389.	Boojho made the following sketch of the solar system. Is the sketch correct? If not, correct it.
Answer» Boojho made the following sketch of the solar system. Is the sketch correct? If not, correct it.

Discussion

2390.	How can we know that , an object is having a'' positive charge" or " negative charge"?? How ca we measure it ??
Answer» How can we know that , an object is having a'' positive charge" or " negative charge"?? How ca we measure it ??

Discussion

2391.	If a pushing force an angle α with horizontal is applied on a block of mass m placed on horizontal table and angle of function is β, then minimum magnitude of force required to move the block is
Answer» If a pushing force an angle α with horizontal is applied on a block of mass m placed on horizontal table and angle of function is β, then minimum magnitude of force required to move the block is

Discussion

2392.	How did the two asteroid belts we know of form?
Answer» How did the two asteroid belts we know of form?

Discussion

2393.	State two difference between the artificial satellites of the Earth and its natural satellite Moon.
Answer» State two difference between the artificial satellites of the Earth and its natural satellite Moon.

Discussion

2394.	the amount of work done in forming a soap film of size 5cm×15cm if surface tension is 10^{-2}N/m i
Answer» the amount of work done in forming a soap film of size 5cm×15cm if surface tension is 10^{-2}N/m i

Discussion

2395.	can electric field by a small dipole be zero at a finite dis†an ce from electric dipole?why? explain
Answer» can electric field by a small dipole be zero at a finite dis†an ce from electric dipole?why? explain

Discussion

2396.	If two plane mirrors are kept inclined to each other at an angle of 60 degrees, the number of images of the object formed is:
Answer» If two plane mirrors are kept inclined to each other at an angle of 60 degrees, the number of images of the object formed is:

Discussion

2397.	Question 14 The aluminium strips in an electroscope as shown in the figure are replaced by plastic strips and a charged body is brought in contact with the metal clip. what will happen?
Answer» Question 14 The aluminium strips in an electroscope as shown in the figure are replaced by plastic strips and a charged body is brought in contact with the metal clip. what will happen?

2397.

Question 14 The aluminium strips in an electroscope as shown in the figure are replaced by plastic strips and a charged body is brought in contact with the metal clip. what will happen?

Answer»

Question 14

The aluminium strips in an electroscope as shown in the figure are replaced by plastic strips and a charged body is brought in contact with the metal clip. what will happen?

Discussion

2398.	The normal least distance of vision for a young adult is about
Answer» The normal least distance of vision for a young adult is about

Discussion

2399.	When does the length of the focal length change (under what conditions)? Isn't focal length and focus ( foci) of a spherical mirror and lens fixed?
Answer» When does the length of the focal length change (under what conditions)? Isn't focal length and focus ( foci) of a spherical mirror and lens fixed?

Discussion

2400.	Discuss and write.(a) Write a science based paragraph on 'What if the sun did not rise?'(b) What efforts will you make to remove the misconceptions about eclipses?(c) Various eclipses and the conditions during the period.
Answer» Discuss and write. (a) Write a science based paragraph on 'What if the sun did not rise?' (b) What efforts will you make to remove the misconceptions about eclipses? (c) Various eclipses and the conditions during the period.

Discussion

Explore topic-wise InterviewSolutions in .

63. Is there any edge of universe?

The inter-molecular force is maximum in :

Explain the following : (a) A coin placed at the bottom of a vessel appears to be raised when water is poured in the vessel. (b) A straight stick partly dipped in water obliquely, appears to be bent at the surface of water. (c) The sun is seen before the sunrise and after the sunset.

Question 06.3 Fill in the blanks in the following.The size of the pupil becomes ________ when you see in dim light.

How do bats see?

How can we neutralize a charged electroscope?

Name some effective safety measures against cyclone?

What will you observe when the metal top of an electroscope is touched with a plastic comb rubbed in dry hair ? Give reason for your answer.

Has the poet used exaggeration for special effect? Find a few examples of it and read those lines aloud.

A force of 100 N is applied on an area of 5 m2. Compute the pressure being applied to the area.

Why cannot a sound be heard on the moon? How do astronauts talk to one another on the surface of the moon?

The splitting of white light into seven colours is known as ___.

128.A wedge with mass M rests on frictionless horizontal surface . A block with mass m is placed on the wedge . There is no friction between the block and wedge. A horizontal force F is applied to the wedge . What magnitude F must have if block is to remain at constant height above the table top ??

A sample of Ideal Gas (Gamma=1.4) is heated at constant pressure.If heat of 140 J is supplied,what will be W?

State some precautions to be taken while measuring length with the help of a metre scale.

How do the lightning occurs in atmosphere

What is electroplating? Give examples.

A cannon ball of mass 2 kg is fired at a target 500 m away. The 400 kg cannon recoils with a velocity of 2 ms−1. Assuming cannon ball moves with constant velocity, when does it hit the target?

A block is placed over a table. . In which of the given case(s) the block will move to the east direction, if the force applied on it has been shown by arrows?

13.A body is moving with an initial velocity of u m/s and acceleration of 4 m/s sq.If it cover 20 m in 2 sec. , then find the value of u. Option 1. 14m/s 2 41 m/s 3.5 m/s 4.10 m/s

Which of the following measurements is most accurate? Options 2.00 m 2.0 m 2 m 20.00 m

Which of the following materials resist the flow of electron the most?

Define force. State its S.I. unit.

Incident light falling on the surface is sent back into the same medium is an example of ___.

A particle is moving in x-y plane as x=at and y=at - abt^2 where a and b are constants and t is time. What is the equation of path of particle?

A body is floating in water. 1/3rd of the body is inside the water and 2/3rd is in the air as shown in the figure. Find out the density of the body. ρw=Density of waterρb=Density of the body

In which of the following examples chemical effects of electric current is desirable?

How is a spherical mirror used to converge a beam of light at a point ? Name the type of mirror used.

A stone of mass 7 kg is dropped from a height of 5 m. Calculate the linear momentum of the stone when it reaches the ground.Take g=10 m/s2

Which is higher–the atmospheric pressure at Mumbai or the atmospheric pressure on top of Mt Everest? Give reasons.

___________ is the part of space that exists between stars or celestial bodies.

A object changing its position with respect to a reference body with time is ____ with respect to the body.

Calculate the work required to be done to stop a car of 1500 kg moving at a velocity of 72 kmph?

What is the approximate value of 1 radian in degree measure?

Electric field intensity due to linear charge distribution at broad on position?

the ratio of intensities betwen two coherent sound sources is 4:1.the difference of loudness in dB between maximum and minimum intensities when they interfere in the space is

Boojho made the following sketch of the solar system. Is the sketch correct? If not, correct it.

How can we know that , an object is having a'' positive charge" or " negative charge"?? How ca we measure it ??

If a pushing force an angle α with horizontal is applied on a block of mass m placed on horizontal table and angle of function is β, then minimum magnitude of force required to move the block is

How did the two asteroid belts we know of form?

State two difference between the artificial satellites of the Earth and its natural satellite Moon.

the amount of work done in forming a soap film of size 5cm×15cm if surface tension is 10^{-2}N/m i

can electric field by a small dipole be zero at a finite dis†an ce from electric dipole?why? explain

If two plane mirrors are kept inclined to each other at an angle of 60 degrees, the number of images of the object formed is:

Question 14 The aluminium strips in an electroscope as shown in the figure are replaced by plastic strips and a charged body is brought in contact with the metal clip. what will happen?

The normal least distance of vision for a young adult is about

When does the length of the focal length change (under what conditions)? Isn't focal length and focus ( foci) of a spherical mirror and lens fixed?

Discuss and write.(a) Write a science based paragraph on 'What if the sun did not rise?'(b) What efforts will you make to remove the misconceptions about eclipses?(c) Various eclipses and the conditions during the period.