9478 + Interview Questions in Physics Page 171 InterviewSolution

8501.	A certain quantity of water is heated from 20∘C to 100∘C. Its temperature is recorded after each 1 minute. The observations are: Time(in minute)Temperature(in ∘C)02013024035046057068079081009100101001110012100 What conclusion do you draw from the above table about the boiling point of water? Explain.
Answer» A certain quantity of water is heated from $20^{\circ} C$ to $100^{\circ} C .$ Its temperature is recorded after each 1 minute. The observations are: $\begin{matrix} Time(in minute) & Temperature (i n^{\circ} C) 0 & 20 1 & 30 2 & 40 3 & 50 4 & 60 5 & 70 6 & 80 7 & 90 8 & 100 9 & 100 10 & 100 11 & 100 12 & 100 \end{matrix}$ What conclusion do you draw from the above table about the boiling point of water? Explain.

8501.

A certain quantity of water is heated from 20∘C to 100∘C. Its temperature is recorded after each 1 minute. The observations are: Time(in minute)Temperature(in ∘C)02013024035046057068079081009100101001110012100 What conclusion do you draw from the above table about the boiling point of water? Explain.

Answer»

A certain quantity of water is heated from $20^{\circ} C$ to $100^{\circ} C .$ Its temperature is recorded after each 1 minute. The observations are:

$\begin{matrix} Time(in minute) & Temperature (i n^{\circ} C) 0 & 20 1 & 30 2 & 40 3 & 50 4 & 60 5 & 70 6 & 80 7 & 90 8 & 100 9 & 100 10 & 100 11 & 100 12 & 100 \end{matrix}$

What conclusion do you draw from the above table about the boiling point of water? Explain.

Discussion

8502.	If a heater of 100 Ω resistance draws a current of 5 A for an hour then find the energy consumed by the heater.
Answer» If a heater of 100 $Ω$ resistance draws a current of 5 A for an hour then find the energy consumed by the heater.

Discussion

8503.	A cuboidal body of dimensions 2 m × 3 m × 4 m is acted upon by a perpendicular force of 50 N on the top surface (2 m × 3 m) as shown in the figure. Calculate the pressure due to the force on that surface.
Answer» A cuboidal body of dimensions 2 m $\times$ 3 m $\times$ 4 m is acted upon by a perpendicular force of 50 N on the top surface (2 m $\times$ 3 m) as shown in the figure. Calculate the pressure due to the force on that surface.

Discussion

8504.	Why do kabaddi players rub their hands with dry soil ?
Answer» Why do kabaddi players rub their hands with dry soil ?

Discussion

8505.	The basic capacitor is made up of ___ that separates two conductive plates
Answer» The basic capacitor is made up of ___ that separates two conductive plates

Discussion

8506.	Name the instrument used to measure and record an earthquake.
Answer» Name the instrument used to measure and record an earthquake.

Discussion

8507.	What steps are neccesary to be followed for proper care of your eyes? [5 MARKS]
Answer» What steps are neccesary to be followed for proper care of your eyes? [5 MARKS]

Discussion

8508.	Wheels reduce friction by:
Answer» Wheels reduce friction by:

Discussion

8509.	To maintain a body in uniform motion on a flat surface, we need to apply an external force to encounter the
Answer» To maintain a body in uniform motion on a flat surface, we need to apply an external force to encounter the

Discussion

8510.	Two plane mirrors are arranged parallel and facing each other with some separation. How many images are formed for a point object kept in between them ? Show the formation of images with the help of a ray diagram.
Answer» Two plane mirrors are arranged parallel and facing each other with some separation. How many images are formed for a point object kept in between them ? Show the formation of images with the help of a ray diagram.

Discussion

8511.	who is having high fequency an adult or a baby
Answer» who is having high fequency an adult or a baby

Discussion

8512.	Which of the following actions requires muscular force?
Answer» Which of the following actions requires muscular force?

Discussion

8513.	A ball is rolled down an inclined plane placed on a table, it will travel maximum distance
Answer» A ball is rolled down an inclined plane placed on a table, it will travel maximum distance

Discussion

8514.	A sound wave goes from medium A to medium B. What can you say about its frequency in both the media?
Answer» A sound wave goes from medium A to medium B. What can you say about its frequency in both the media?

Discussion

8515.	A farmer wants to grow paddy on half of his square field of side 13 m, and leave the remaining land open. Find the area of the land used up to grow the paddy in m2.84.5
Answer» A farmer wants to grow paddy on half of his square field of side $13 m$ , and leave the remaining land open. Find the area of the land used up to grow the paddy in $m^{2}$ . 84.5

Discussion

8516.	____ is the amount of two-dimensional space taken up by an object.
Answer» ____ is the amount of two-dimensional space taken up by an object.

Discussion

8517.	A bolt completely sinks into a 15 cm deep bowl of oil. What is the apparent depth of the bolt (in cm), if the refractive index of the oil is 1.4?10.714
Answer» A bolt completely sinks into a $15 cm$ deep bowl of oil. What is the apparent depth of the bolt (in $cm$ ), if the refractive index of the oil is $1.4$ ? 10.714

Discussion

8518.	The epicentre of an earthquake is: (a) deep under the crust of earth (b) in the mantle of earth (c) on the surfce of earth (d) in the core of earth
Answer» The epicentre of an earthquake is: (a) deep under the crust of earth (b) in the mantle of earth (c) on the surfce of earth (d) in the core of earth

8518.

The epicentre of an earthquake is: (a) deep under the crust of earth (b) in the mantle of earth (c) on the surfce of earth (d) in the core of earth

Answer»

The epicentre of an earthquake is:

(a) deep under the crust of earth (b) in the mantle of earth

(c) on the surfce of earth (d) in the core of earth

Discussion

8519.	Ray diagram of image formation when object is kept on focal point on principal axis before a convex mirror.
Answer» Ray diagram of image formation when object is kept on focal point on principal axis before a convex mirror.

Discussion

8520.	Which of the following is true about a positively charged body?
Answer» Which of the following is true about a positively charged body?

Discussion

8521.	The base of a container measures 15×20cm. It is placed on a table top. If the weight of the container is 60 N, what is the pressure exerted by the container on the table top?
Answer» The base of a container measures $15 \times 20$ cm. It is placed on a table top. If the weight of the container is 60 N, what is the pressure exerted by the container on the table top?

Discussion

8522.	Is a force required to keep a body moving
Answer» Is a force required to keep a body moving

Discussion

8523.	A game of tug of war is an example of
Answer» A game of tug of war is an example of

Discussion

8524.	___ is the primary unit of temperature in SI system.
Answer» ___ is the primary unit of temperature in SI system.

Discussion

8525.	An inflated balloon is rubbed with woollen cloth and in another case, a ballpen refill is rubbed with polythene. When they were brought close, it is observed that they attract each other. What can we understand by this?
Answer» An inflated balloon is rubbed with woollen cloth and in another case, a ballpen refill is rubbed with polythene. When they were brought close, it is observed that they attract each other. What can we understand by this?

Discussion

8526.	Which of these are the units of the moment of force?
Answer» Which of these are the units of the moment of force?

Discussion

8527.	The respective values of x and y in parallelogram shown in the figure are
Answer» The respective values of x and y in parallelogram shown in the figure are

8527.

The respective values of x and y in parallelogram shown in the figure are

Answer»

The respective values of x and y in parallelogram shown in the figure are

Discussion

8528.	Explain in short why a glass rod can be charged by rubbing when held by hand but an iron rod cannot be charged by rubbing if held by hand ?
Answer» Explain in short why a glass rod can be charged by rubbing when held by hand but an iron rod cannot be charged by rubbing if held by hand ?

Discussion

8529.	In the experiment given below, if the atmospheric pressure is 76 cm of Hg (h0) and the height is 3 cm, find the pressure of the gas in the tube.
Answer» In the experiment given below, if the atmospheric pressure is 76 cm of Hg $(h_{0})$ and the height is 3 cm, find the pressure of the gas in the tube.

8529.

In the experiment given below, if the atmospheric pressure is 76 cm of Hg (h0) and the height is 3 cm, find the pressure of the gas in the tube.

Answer»

In the experiment given below, if the atmospheric pressure is 76 cm of Hg $(h_{0})$ and the height is 3 cm, find the pressure of the gas in the tube.

Discussion

8530.	Given in the figure is a football on which some force is applied. On which of the floors does the ball travel a longer distance?
Answer» Given in the figure is a football on which some force is applied. On which of the floors does the ball travel a longer distance?

8530.

Given in the figure is a football on which some force is applied. On which of the floors does the ball travel a longer distance?

Answer»

Given in the figure is a football on which some force is applied. On which of the floors does the ball travel a longer distance?

Discussion

8531.	An elephant of mass 4000 kg and foot area 250 cm2 standing on the floor . Assuming that acceleration due to gravity is 10 m/s2 , find the pressure exerted by elephant on the floor?
Answer» An elephant of mass 4000 kg and foot area 250 cm² standing on the floor . Assuming that acceleration due to gravity is 10 m/s² , find the pressure exerted by elephant on the floor?

Discussion

8532.	Explain the quantities that the terms Loudness and Pitch of sound depend on? Give units of those quantities. [5 MARKS]
Answer» Explain the quantities that the terms Loudness and Pitch of sound depend on? Give units of those quantities. [5 MARKS]

Discussion

8533.	What is required for a kaleidoscope to produce images?
Answer» What is required for a kaleidoscope to produce images?

Discussion

8534.	How can we hear the sound of the sun when there is no medium in the space?
Answer» How can we hear the sound of the sun when there is no medium in the space?

Discussion

8535.	Select which of the following is not matched correctly.
Answer» Select which of the following is not matched correctly.

Discussion

8536.	Why does the nose of some people start bleeding at higher altitude
Answer» Why does the nose of some people start bleeding at higher altitude

Discussion

8537.	If the electrons of atoms repel each other than how does adhesive force exist
Answer» If the electrons of atoms repel each other than how does adhesive force exist

Discussion

8538.	Whenever lightning occurs during rainy season, your mom asks you to unplug the television cable line because
Answer» Whenever lightning occurs during rainy season, your mom asks you to unplug the television cable line because

Discussion

8539.	An ice block is in a trough which is rotating about vertical axis passing through its centre. When ice melts completely, the angular velocity of the system
Answer» An ice block is in a trough which is rotating about vertical axis passing through its centre. When ice melts completely, the angular velocity of the system

8539.

An ice block is in a trough which is rotating about vertical axis passing through its centre. When ice melts completely, the angular velocity of the system

Answer»

An ice block is in a trough which is rotating about vertical axis passing through its centre. When ice melts completely, the angular velocity of the system

Discussion

8540.	If potential difference increases, will rate of flow of electricity also increase to attain equilibrium faster?
Answer» If potential difference increases, will rate of flow of electricity also increase to attain equilibrium faster?

Discussion

8541.	(a) How much time does light take to reach us from the sun? (b) How much time does light take to reach us from the next nearest star 'Proxima centauri'?
Answer» (a) How much time does light take to reach us from the sun? (b) How much time does light take to reach us from the next nearest star 'Proxima centauri'?

8541.

(a) How much time does light take to reach us from the sun? (b) How much time does light take to reach us from the next nearest star 'Proxima centauri'?

Answer»

(a) How much time does light take to reach us from the sun?

(b) How much time does light take to reach us from the next nearest star 'Proxima centauri'?

Discussion

8542.	For the decimal number 2.5, 0.25, 25.0 and 0.025. Choose the correct one.
Answer» For the decimal number 2.5, 0.25, 25.0 and 0.025. Choose the correct one.

Discussion

8543.	The SI unit of mechanical equivalent of heat is
Answer» The SI unit of mechanical equivalent of heat is

Discussion

8544.	Analyze the ray diagram of two mirrors inclined at an angle to each other. Find the angle between two mirrors?
Answer» Analyze the ray diagram of two mirrors inclined at an angle to each other. Find the angle between two mirrors?

Discussion

8545.	Friction between any two surfaces is due to
Answer» Friction between any two surfaces is due to

Discussion

8546.	In order to cover a certain distance in a shorter time span, the object should have a greater _________.
Answer» In order to cover a certain distance in a shorter time span, the object should have a greater _________.

Discussion

8547.	A vessel of depth 2d cm is half filled with a liquid of refractive index μ1 and the upper half with a liquid of refractive index μ2. The apparent depth of the vessel seen perpendicularly is
Answer» A vessel of depth $2 d c m$ is half filled with a liquid of refractive index $μ_{1}$ and the upper half with a liquid of refractive index $μ_{2}$ . The apparent depth of the vessel seen perpendicularly is

8547.

A vessel of depth 2d cm is half filled with a liquid of refractive index μ1 and the upper half with a liquid of refractive index μ2. The apparent depth of the vessel seen perpendicularly is

Answer»

A vessel of depth $2 d c m$ is half filled with a liquid of refractive index $μ_{1}$ and the upper half with a liquid of refractive index $μ_{2}$ . The apparent depth of the vessel seen perpendicularly is

Discussion

8548.	Which of the following is/are true about liquids?
Answer» Which of the following is/are true about liquids?

Discussion

8549.	The work done in blowing a soap bubble of radius r of the solution of surface tension T will be
Answer» The work done in blowing a soap bubble of radius r of the solution of surface tension T will be

8549.

The work done in blowing a soap bubble of radius r of the solution of surface tension T will be

Answer»

The work done in blowing a soap bubble of radius r of the solution of surface tension T will be

Discussion

8550.	Simple harmonic motion of a pendulum is used for measurement of ___ .
Answer» Simple harmonic motion of a pendulum is used for measurement of ___ .

Discussion

Explore topic-wise InterviewSolutions in .

If a heater of 100 Ω resistance draws a current of 5 A for an hour then find the energy consumed by the heater.

A cuboidal body of dimensions 2 m × 3 m × 4 m is acted upon by a perpendicular force of 50 N on the top surface (2 m × 3 m) as shown in the figure. Calculate the pressure due to the force on that surface.

Why do kabaddi players rub their hands with dry soil ?

The basic capacitor is made up of ___ that separates two conductive plates

Name the instrument used to measure and record an earthquake.

What steps are neccesary to be followed for proper care of your eyes? [5 MARKS]

Wheels reduce friction by:

To maintain a body in uniform motion on a flat surface, we need to apply an external force to encounter the

Two plane mirrors are arranged parallel and facing each other with some separation. How many images are formed for a point object kept in between them ? Show the formation of images with the help of a ray diagram.

who is having high fequency an adult or a baby

Which of the following actions requires muscular force?

A ball is rolled down an inclined plane placed on a table, it will travel maximum distance

A sound wave goes from medium A to medium B. What can you say about its frequency in both the media?

A farmer wants to grow paddy on half of his square field of side 13 m, and leave the remaining land open. Find the area of the land used up to grow the paddy in m2.84.5

____ is the amount of two-dimensional space taken up by an object.

A bolt completely sinks into a 15 cm deep bowl of oil. What is the apparent depth of the bolt (in cm), if the refractive index of the oil is 1.4?10.714

The epicentre of an earthquake is: (a) deep under the crust of earth (b) in the mantle of earth (c) on the surfce of earth (d) in the core of earth

Ray diagram of image formation when object is kept on focal point on principal axis before a convex mirror.

Which of the following is true about a positively charged body?

The base of a container measures 15×20cm. It is placed on a table top. If the weight of the container is 60 N, what is the pressure exerted by the container on the table top?

Is a force required to keep a body moving

A game of tug of war is an example of

___ is the primary unit of temperature in SI system.

An inflated balloon is rubbed with woollen cloth and in another case, a ballpen refill is rubbed with polythene. When they were brought close, it is observed that they attract each other. What can we understand by this?

Which of these are the units of the moment of force?

The respective values of x and y in parallelogram shown in the figure are

Explain in short why a glass rod can be charged by rubbing when held by hand but an iron rod cannot be charged by rubbing if held by hand ?

In the experiment given below, if the atmospheric pressure is 76 cm of Hg (h0) and the height is 3 cm, find the pressure of the gas in the tube.

Given in the figure is a football on which some force is applied. On which of the floors does the ball travel a longer distance?

An elephant of mass 4000 kg and foot area 250 cm​​​​​2 standing on the floor . Assuming that acceleration due to gravity is 10 m/s​​​​​​2 , find the pressure exerted by elephant on the floor?

Explain the quantities that the terms Loudness and Pitch of sound depend on? Give units of those quantities. [5 MARKS]

What is required for a kaleidoscope to produce images?

How can we hear the sound of the sun when there is no medium in the space?

Select which of the following is not matched correctly.

Why does the nose of some people start bleeding at higher altitude

If the electrons of atoms repel each other than how does adhesive force exist

Whenever lightning occurs during rainy season, your mom asks you to unplug the television cable line because

An ice block is in a trough which is rotating about vertical axis passing through its centre. When ice melts completely, the angular velocity of the system

If potential difference increases, will rate of flow of electricity also increase to attain equilibrium faster?

(a) How much time does light take to reach us from the sun? (b) How much time does light take to reach us from the next nearest star 'Proxima centauri'?

For the decimal number 2.5, 0.25, 25.0 and 0.025. Choose the correct one.

The SI unit of mechanical equivalent of heat is

Analyze the ray diagram of two mirrors inclined at an angle to each other. Find the angle between two mirrors?

Friction between any two surfaces is due to

In order to cover a certain distance in a shorter time span, the object should have a greater _________.

A vessel of depth 2d cm is half filled with a liquid of refractive index μ1 and the upper half with a liquid of refractive index μ2. The apparent depth of the vessel seen perpendicularly is

Which of the following is/are true about liquids?

The work done in blowing a soap bubble of radius r of the solution of surface tension T will be

Simple harmonic motion of a pendulum is used for measurement of ___ .

An elephant of mass 4000 kg and foot area 250 cm2 standing on the floor . Assuming that acceleration due to gravity is 10 m/s2 , find the pressure exerted by elephant on the floor?