16569 + Interview Questions in Physics

1.	The basic difference between uniform linear motion & uniform circular motion is
Answer» The basic difference between uniform linear motion & uniform circular motion is

Discussion

2.	The improper functioning of the thyroid gland signs by sluggishness, swelling of face and hands, is known as:
Answer» The improper functioning of the thyroid gland signs by sluggishness, swelling of face and hands, is known as:

Discussion

3.	The generator works on the principle of ____ .
Answer» The generator works on the principle of ____ .

Discussion

4.	Complete the following sentence: Domestic gas cylinders like Indane contain mainly ...........
Answer» Complete the following sentence: Domestic gas cylinders like Indane contain mainly ...........

Discussion

5.	A drop each of two non-corrosive and non-irritating liquids A and B at a temperature of 22∘C are placed on the skin. Liquid A gives a more cooling sensation than liquid B. Which of the following can be said about the liquids A and B?
Answer» A drop each of two non-corrosive and non-irritating liquids A and B at a temperature of $22^{\circ} C$ are placed on the skin. Liquid A gives a more cooling sensation than liquid B. Which of the following can be said about the liquids A and B?

Discussion

6.	The image of an object placed on the principal axis of a concave mirror of focal length 12 cm is formed at a point which is 10 cm more distant from the mirror than the object. The magnification of the image is
Answer» The image of an object placed on the principal axis of a concave mirror of focal length 12 cm is formed at a point which is 10 cm more distant from the mirror than the object. The magnification of the image is

Discussion

7.	Rahul is standing in front of a plane mirror. The distance between Rahul and his image is 150cm. If Rahul's distance from the mirror is x. What could be the possible value of x?
Answer» Rahul is standing in front of a plane mirror. The distance between Rahul and his image is 150cm. If Rahul's distance from the mirror is x. What could be the possible value of x?

Discussion

8.	Which of the following gas is released due to the combustion of fuels in insufficient air (oxygen)?
Answer» Which of the following gas is released due to the combustion of fuels in insufficient air (oxygen)?

Discussion

9.	The minimum energy required to launch a satellite of mass m from the surface of earth of radius R in a cirulcar orbit at an altitude 2R is (mass of earth is M)
Answer» The minimum energy required to launch a satellite of mass m from the surface of earth of radius R in a cirulcar orbit at an altitude 2R is (mass of earth is M)

Discussion

10.	Explain greenhouse effect in brief. [5 MARKS]
Answer» Explain greenhouse effect in brief. [5 MARKS]

Discussion

11.	The heat capacity of a body can be calculated using which relation mentioned below?
Answer» The heat capacity of a body can be calculated using which relation mentioned below?

Discussion

12.	A light-ray behaves ________.
Answer» A light-ray behaves ________.

Discussion

13.	Question 18 (b) A person needs a lens of power –4.5 D for correction of her vision. What is the focal length of the corrective lens?
Answer» Question 18 (b) A person needs a lens of power –4.5 D for correction of her vision. What is the focal length of the corrective lens?

Discussion

14.	If velocity (V), force(F) and time(t) are taken to be fundamental quantities and K is the dimensionless constant of proportionality, find the dimensional formula for mass.
Answer» If velocity (V), force(F) and time(t) are taken to be fundamental quantities and K is the dimensionless constant of proportionality, find the dimensional formula for mass.

Discussion

15.	An experimenter adds 970 J of heat to 1.75 mol of an ideal gas to heat it from 10.0∘C to 25.0∘C at constant pressure. The gas does +223 J of work during the expansion. (i) Calculate the change in internal energy of the gas. (ii) Calculate γ for the gas.
Answer» An experimenter adds 970 J of heat to 1.75 mol of an ideal gas to heat it from ${10.0}^{\circ} C$ to ${25.0}^{\circ} C$ at constant pressure. The gas does +223 J of work during the expansion. (i) Calculate the change in internal energy of the gas. (ii) Calculate $γ$ for the gas.

Discussion

16.	The splitting of white light into several colors on passing through a glass prism is due to
Answer» The splitting of white light into several colors on passing through a glass prism is due to

Discussion

17.	Sound is an example of
Answer» Sound is an example of

Discussion

18.	Value of current in the diagram ?
Answer» Value of current in the diagram ?

Discussion

19.	A solid whose volume does not change with temperature floats in a liquid. For two different temperatures t1 and t2 of the liquid, fractions f1 and f2 of the volume of the solid remain submerged in the liquid. The coefficient of volume expansion of the liquid is equal to
Answer» A solid whose volume does not change with temperature floats in a liquid. For two different temperatures $t_{1}$ and $t_{2}$ of the liquid, fractions $f_{1}$ and $f_{2}$ of the volume of the solid remain submerged in the liquid. The coefficient of volume expansion of the liquid is equal to

Discussion

20.	527.34÷85
Answer» 527.34÷85

Discussion

21.	"Burning fossil fuels are a cause of global warming.” Justify this statement.
Answer» "Burning fossil fuels are a cause of global warming.” Justify this statement.

Discussion

22.	Question 27 What are the environmental consequences of using fossil fuels? Suggest the steps to minimize the pollution caused by various sources of energy including non-conventional sources of energy.
Answer» Question 27 What are the environmental consequences of using fossil fuels? Suggest the steps to minimize the pollution caused by various sources of energy including non-conventional sources of energy.

Discussion

23.	A tangential force of 10 N is applied on the periphery of a ring due to which it starts rotating about an axis through its centre and perpendicular to its plane. What is the work done by this force in rotating the ring by 45o? {R = 2m}.
Answer» A tangential force of 10 N is applied on the periphery of a ring due to which it starts rotating about an axis through its centre and perpendicular to its plane. What is the work done by this force in rotating the ring by $45^{o}$ ? {R = 2m}.

Discussion

24.	We all have observed that some people have black eyes, some brown and some light blue. What part of the eye gives it its colour?
Answer» We all have observed that some people have black eyes, some brown and some light blue. What part of the eye gives it its colour?

Discussion

25.	An electron enters into the magnetic field and perpendicular to it, as shown in the figure. The direction of the force acting on the electrons will be?
Answer» An electron enters into the magnetic field and perpendicular to it, as shown in the figure. The direction of the force acting on the electrons will be?

25.

An electron enters into the magnetic field and perpendicular to it, as shown in the figure. The direction of the force acting on the electrons will be?

Answer»

An electron enters into the magnetic field and perpendicular to it, as shown in the figure. The direction of the force acting on the electrons will be?

Discussion

26.	If the area of the rectangle is 1/6th of the area of the circle such that area of the circle is 36 cm2 and breadth of the rectangle is 6cm, then the length of the rectangle will be ___.
Answer» If the area of the rectangle is 1/6th of the area of the circle such that area of the circle is $36 c m^{2}$ and breadth of the rectangle is 6cm, then the length of the rectangle will be ___.

Discussion

27.	A disc is painted as in the figure below. It is rotated very fast as indicated by the direction of the arrow. What will be the colour of the disc?
Answer» A disc is painted as in the figure below. It is rotated very fast as indicated by the direction of the arrow. What will be the colour of the disc?

27.

A disc is painted as in the figure below. It is rotated very fast as indicated by the direction of the arrow. What will be the colour of the disc?

Answer»

A disc is painted as in the figure below. It is rotated very fast as indicated by the direction of the arrow. What will be the colour of the disc?

Discussion

28.	How can a lamp rated 12 watt 6 volt B rated on a 12 volt battery ?explain
Answer» How can a lamp rated 12 watt 6 volt B rated on a 12 volt battery ?explain

Discussion

29.	Why does the number plate of a car on the highway seems to flicker on a sunny day?
Answer» Why does the number plate of a car on the highway seems to flicker on a sunny day?

Discussion

30.	Mirage is formed due to
Answer» Mirage is formed due to

Discussion

31.	What is diffraction?
Answer» What is diffraction?

Discussion

32.	Consider the situatuion shown in figure. A plane mirror is fixed at a height h above the bottom of a beaker containing water (refractive index μ ) up to a height d. Find the position of the image of the bottom formed by the mirror.
Answer» Consider the situatuion shown in figure. A plane mirror is fixed at a height h above the bottom of a beaker containing water (refractive index $μ$ ) up to a height d. Find the position of the image of the bottom formed by the mirror.

Discussion

33.	What is/are valencies of Mercury?
Answer» What is/are valencies of Mercury?

Discussion

34.	Why real image is always inverted and virtual image is always erect?
Answer» Why real image is always inverted and virtual image is always erect?

Discussion

35.	Rheostat -> Changes current without changing voltage But if current inverses, voltage should also because V proportional to I. Then how does rheostat do it?
Answer» Rheostat -> Changes current without changing voltage But if current inverses, voltage should also because V proportional to I. Then how does rheostat do it?

35.

Rheostat -> Changes current without changing voltage But if current inverses, voltage should also because V proportional to I. Then how does rheostat do it?

Answer»

Rheostat -> Changes current without changing voltage

But if current inverses, voltage should also because V proportional to I. Then how does rheostat do it?

Discussion

36.	Why light do not refract through a wood or metal like iron or some other things why it reflects or bounce back from these surface? Glass slab is also a solid so why light refract in it?
Answer» Why light do not refract through a wood or metal like iron or some other things why it reflects or bounce back from these surface? Glass slab is also a solid so why light refract in it?

Discussion

37.	How do two eyes help us see 3D?
Answer» How do two eyes help us see 3D?

Discussion

38.	A particle having mass m is projected with a velocity v0 from a point P on a horizontal ground making an angle θ with horizontal. Find out the torque about the point of projection acting on the particle when it is at its maximum height?
Answer» A particle having mass $m$ is projected with a velocity $v_{0}$ from a point $P$ on a horizontal ground making an angle $θ$ with horizontal. Find out the torque about the point of projection acting on the particle when it is at its maximum height?

38.

A particle having mass m is projected with a velocity v0 from a point P on a horizontal ground making an angle θ with horizontal. Find out the torque about the point of projection acting on the particle when it is at its maximum height?

Answer»

A particle having mass $m$ is projected with a velocity $v_{0}$ from a point $P$ on a horizontal ground making an angle $θ$ with horizontal. Find out the torque about the point of projection acting on the particle when it is at its maximum height?

Discussion

39.	The image formed by a concave mirror is real, inverted and of the same size as the object. The position of the object must then be : (a) at the focus (b) between the centre of curvature and focus (c) at the centre of curvature (d) beyond the centre of curvature
Answer» The image formed by a concave mirror is real, inverted and of the same size as the object. The position of the object must then be : (a) at the focus (b) between the centre of curvature and focus (c) at the centre of curvature (d) beyond the centre of curvature

Discussion

40.	Choose the correct option: 1.Tonei.frequencies that are integral multiple of fundamental frequency.2.Noteii.sound of single frequency.3.Overtoneiii.sound of multiple frequencies.4.Harmoniciv.higher frequencies other than fundamental frequency.
Answer» Choose the correct option: $\begin{matrix} 1. & T o n e & i . & f r e q u e n c i e s t h a t a r e i n t e g r a l m u l t i p l e o f f u n d a m e n t a l f r e q u e n c y . 2. & N o t e & i i . & s o u n d o f s i n g l e f r e q u e n c y . 3. & O v e r t o n e & i i i . & s o u n d o f m u l t i p l e f r e q u e n c i e s . 4. & H a r m o n i c & i v . & h i g h e r f r e q u e n c i e s o t h e r t h a n f u n d a m e n t a l f r e q u e n c y . \end{matrix}$

40.

Choose the correct option: 1.Tonei.frequencies that are integral multiple of fundamental frequency.2.Noteii.sound of single frequency.3.Overtoneiii.sound of multiple frequencies.4.Harmoniciv.higher frequencies other than fundamental frequency.

Answer»

Choose the correct option:

$\begin{matrix} 1. & T o n e & i . & f r e q u e n c i e s t h a t a r e i n t e g r a l m u l t i p l e o f f u n d a m e n t a l f r e q u e n c y . 2. & N o t e & i i . & s o u n d o f s i n g l e f r e q u e n c y . 3. & O v e r t o n e & i i i . & s o u n d o f m u l t i p l e f r e q u e n c i e s . 4. & H a r m o n i c & i v . & h i g h e r f r e q u e n c i e s o t h e r t h a n f u n d a m e n t a l f r e q u e n c y . \end{matrix}$

Discussion

41.	A 2 cm long pin is placed perpendicular to the principal axis of a convex lens of focal length 15 cm at distance of 25 cm from the lens. Find the position of image and its size. [3 MARKS]
Answer» A 2 cm long pin is placed perpendicular to the principal axis of a convex lens of focal length 15 cm at distance of 25 cm from the lens. Find the position of image and its size. [3 MARKS]

Discussion

42.	To determine the focal length of a convex lens by obtaining a sharp image of a distant object we generally follow the following steps which are not in proper sequence.Hold the lens between the object and the screen(a) Measure the distance between the lens and the screen(b) Select a well lit distant object(c) Place a screen opposite to the object on the lab table(d) Adjust the position of the lens to form a sharp imageThe correct sequence of these steps is:
Answer» To determine the focal length of a convex lens by obtaining a sharp image of a distant object we generally follow the following steps which are not in proper sequence. Hold the lens between the object and the screen (a) Measure the distance between the lens and the screen (b) Select a well lit distant object (c) Place a screen opposite to the object on the lab table (d) Adjust the position of the lens to form a sharp image The correct sequence of these steps is:

42.

To determine the focal length of a convex lens by obtaining a sharp image of a distant object we generally follow the following steps which are not in proper sequence.Hold the lens between the object and the screen(a) Measure the distance between the lens and the screen(b) Select a well lit distant object(c) Place a screen opposite to the object on the lab table(d) Adjust the position of the lens to form a sharp imageThe correct sequence of these steps is:

Answer»

To determine the focal length of a convex lens by obtaining a sharp image of a distant object we generally follow the following steps which are not in proper sequence.

Hold the lens between the object and the screen

(a) Measure the distance between the lens and the screen

(b) Select a well lit distant object

(c) Place a screen opposite to the object on the lab table

(d) Adjust the position of the lens to form a sharp image

The correct sequence of these steps is:

Discussion

43.	When two lenses 10 cm and -5cm are placed in contact then find the net power.
Answer» When two lenses 10 cm and -5cm are placed in contact then find the net power.

Discussion

44.	A car of mass 1250 kg experience a resistance of 750 N when it moves at 30ms−1. If the engine can develop 30kW at this speed, the maximum acceleration that the engine can produce is
Answer» A car of mass 1250 kg experience a resistance of 750 N when it moves at $30 m s^{- 1}$ . If the engine can develop 30kW at this speed, the maximum acceleration that the engine can produce is

Discussion

45.	Rahim recorded the following sets of observations while tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence. S.No.Angle of incidenceAngle of refractionAngle of emergenceI45∘41∘45∘II40∘38∘38∘III45∘41∘40∘IV41∘45∘41∘ The correct observation is recorded at serial number:
Answer» Rahim recorded the following sets of observations while tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence. $S.No.Angle of incidenceAngle of refractionAngle of emergenceI45∘41∘45∘II40∘38∘38∘III45∘41∘40∘IV41∘45∘41∘$ The correct observation is recorded at serial number:

45.

Rahim recorded the following sets of observations while tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence. S.No.Angle of incidenceAngle of refractionAngle of emergenceI45∘41∘45∘II40∘38∘38∘III45∘41∘40∘IV41∘45∘41∘ The correct observation is recorded at serial number:

Answer»

Rahim recorded the following sets of observations while tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence.

$S.No.Angle of incidenceAngle of refractionAngle of emergenceI45∘41∘45∘II40∘38∘38∘III45∘41∘40∘IV41∘45∘41∘$

The correct observation is recorded at serial number:

Discussion

46.	If the people of india continue polluting the rivers at the same rate as of now. Then what are the worst things that can happen?
Answer» If the people of india continue polluting the rivers at the same rate as of now. Then what are the worst things that can happen?

Discussion

47.	When 92U235 undergoes fission, 0.1% of its original mass is changed into energy. How much energy is released if 1 kg of 92U235 undergoes fission?
Answer» When $_{92} U^{235}$ undergoes fission, $0.1 %$ of its original mass is changed into energy. How much energy is released if 1 kg of $_{92} U^{235}$ undergoes fission?

Discussion

48.	A wire bent into a circle carries current in an anticlockwise direction. The polarity that this face of the coil will exhibit is
Answer» A wire bent into a circle carries current in an anticlockwise direction. The polarity that this face of the coil will exhibit is

Discussion

49.	Radioactivity is defined as a phenomenon in which certain _______________disintegrate by emitting certain invisible radiations.
Answer» Radioactivity is defined as a phenomenon in which certain _______________disintegrate by emitting certain invisible radiations.

Discussion

50.	Power is
Answer» Power is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The basic difference between uniform linear motion &amp; uniform circular motion is

The improper functioning of the thyroid gland signs by sluggishness, swelling of face and hands, is known as:

The generator works on the principle of ____ .

Complete the following sentence: Domestic gas cylinders like Indane contain mainly ...........

A drop each of two non-corrosive and non-irritating liquids A and B at a temperature of 22∘C are placed on the skin. Liquid A gives a more cooling sensation than liquid B. Which of the following can be said about the liquids A and B?

The image of an object placed on the principal axis of a concave mirror of focal length 12 cm is formed at a point which is 10 cm more distant from the mirror than the object. The magnification of the image is

Rahul is standing in front of a plane mirror. The distance between Rahul and his image is 150cm. If Rahul's distance from the mirror is x. What could be the possible value of x?

Which of the following gas is released due to the combustion of fuels in insufficient air (oxygen)?

The minimum energy required to launch a satellite of mass m from the surface of earth of radius R in a cirulcar orbit at an altitude 2R is (mass of earth is M)

Explain greenhouse effect in brief. [5 MARKS]

The heat capacity of a body can be calculated using which relation mentioned below?

A light-ray behaves ________.

Question 18 (b) A person needs a lens of power –4.5 D for correction of her vision. What is the focal length of the corrective lens?

If velocity (V), force(F) and time(t) are taken to be fundamental quantities and K is the dimensionless constant of proportionality, find the dimensional formula for mass.

An experimenter adds 970 J of heat to 1.75 mol of an ideal gas to heat it from 10.0∘C to 25.0∘C at constant pressure. The gas does +223 J of work during the expansion. (i) Calculate the change in internal energy of the gas. (ii) Calculate γ for the gas.

The splitting of white light into several colors on passing through a glass prism is due to

Sound is an example of

Value of current in the diagram ?

A solid whose volume does not change with temperature floats in a liquid. For two different temperatures t1 and t2 of the liquid, fractions f1 and f2 of the volume of the solid remain submerged in the liquid. The coefficient of volume expansion of the liquid is equal to

527.34÷85

"Burning fossil fuels are a cause of global warming.” Justify this statement.

Question 27 What are the environmental consequences of using fossil fuels? Suggest the steps to minimize the pollution caused by various sources of energy including non-conventional sources of energy.

A tangential force of 10 N is applied on the periphery of a ring due to which it starts rotating about an axis through its centre and perpendicular to its plane. What is the work done by this force in rotating the ring by 45o? {R = 2m}.

We all have observed that some people have black eyes, some brown and some light blue. What part of the eye gives it its colour?

An electron enters into the magnetic field and perpendicular to it, as shown in the figure. The direction of the force acting on the electrons will be?

If the area of the rectangle is 1/6th of the area of the circle such that area of the circle is 36 cm2 and breadth of the rectangle is 6cm, then the length of the rectangle will be ___.

A disc is painted as in the figure below. It is rotated very fast as indicated by the direction of the arrow. What will be the colour of the disc?

How can a lamp rated 12 watt 6 volt B rated on a 12 volt battery ?explain

Why does the number plate of a car on the highway seems to flicker on a sunny day?

Mirage is formed due to

What is diffraction?

Consider the situatuion shown in figure. A plane mirror is fixed at a height h above the bottom of a beaker containing water (refractive index μ ) up to a height d. Find the position of the image of the bottom formed by the mirror.

What is/are valencies of Mercury?

Why real image is always inverted and virtual image is always erect?

Rheostat -&gt; Changes current without changing voltage But if current inverses, voltage should also because V proportional to I. Then how does rheostat do it?

Why light do not refract through a wood or metal like iron or some other things why it reflects or bounce back from these surface? Glass slab is also a solid so why light refract in it?

How do two eyes help us see 3D?

A particle having mass m is projected with a velocity v0 from a point P on a horizontal ground making an angle θ with horizontal. Find out the torque about the point of projection acting on the particle when it is at its maximum height?

The image formed by a concave mirror is real, inverted and of the same size as the object. The position of the object must then be : (a) at the focus (b) between the centre of curvature and focus (c) at the centre of curvature (d) beyond the centre of curvature

Choose the correct option: 1.Tonei.frequencies that are integral multiple of fundamental frequency.2.Noteii.sound of single frequency.3.Overtoneiii.sound of multiple frequencies.4.Harmoniciv.higher frequencies other than fundamental frequency.

A 2 cm long pin is placed perpendicular to the principal axis of a convex lens of focal length 15 cm at distance of 25 cm from the lens. Find the position of image and its size. [3 MARKS]

When two lenses 10 cm and -5cm are placed in contact then find the net power.

A car of mass 1250 kg experience a resistance of 750 N when it moves at 30ms−1. If the engine can develop 30kW at this speed, the maximum acceleration that the engine can produce is

If the people of india continue polluting the rivers at the same rate as of now. Then what are the worst things that can happen?

When 92U235 undergoes fission, 0.1% of its original mass is changed into energy. How much energy is released if 1 kg of 92U235 undergoes fission?

A wire bent into a circle carries current in an anticlockwise direction. The polarity that this face of the coil will exhibit is

Radioactivity is defined as a phenomenon in which certain _______________disintegrate by emitting certain invisible radiations.

Power is

The basic difference between uniform linear motion & uniform circular motion is

Rheostat -> Changes current without changing voltage But if current inverses, voltage should also because V proportional to I. Then how does rheostat do it?