16569 + Interview Questions in Physics

1.	A watch glass has uniform thickness and the average radius of curvature of its two surfaces is much larger than its thickness. It is placed in the path of a beam of parallel light, the beam will
Answer» A watch glass has uniform thickness and the average radius of curvature of its two surfaces is much larger than its thickness. It is placed in the path of a beam of parallel light, the beam will

Discussion

2.	State any two uses of convex lenses.
Answer» State any two uses of convex lenses.

Discussion

3.	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

4.	A body travelling at a speed greater than that of sound is said to be travelling at ___.
Answer» A body travelling at a speed greater than that of sound is said to be travelling at ___.

Discussion

5.	A ray of light is incident normally on a plane mirror. What will be the : (a) angle of incidence ? (b) angle of reflection ?
Answer» A ray of light is incident normally on a plane mirror. What will be the : (a) angle of incidence ? (b) angle of reflection ?

Discussion

6.	(a) With the help of a labelled diagram explain how a convex lens converges a beam of parallel light rays. Mark the principal axis, optical centre, principal focus and focal length of the convex lens on the diagram. (b) State whether the convex lens has a real focus or a virtual focus. (c) List some things that convex lens and concave mirror have in common.
Answer» (a) With the help of a labelled diagram explain how a convex lens converges a beam of parallel light rays. Mark the principal axis, optical centre, principal focus and focal length of the convex lens on the diagram. (b) State whether the convex lens has a real focus or a virtual focus. (c) List some things that convex lens and concave mirror have in common.

Discussion

7.	(a) With the help of a diagram, show how when light falls obliquely on the side of a rectangular glass slab, the emergent ray is parallel to the incident ray. . (b) Show the lateral displacement of the ray on the diagram. (c) State two factors on which the lateral displacement of the emergent ray depends.
Answer» (a) With the help of a diagram, show how when light falls obliquely on the side of a rectangular glass slab, the emergent ray is parallel to the incident ray. . (b) Show the lateral displacement of the ray on the diagram. (c) State two factors on which the lateral displacement of the emergent ray depends.

Discussion

8.	Choose the alternative which is closely resembles the mirror image of the given combination
Answer» Choose the alternative which is closely resembles the mirror image of the given combination

8.

Choose the alternative which is closely resembles the mirror image of the given combination

Answer»

Choose the alternative which is closely resembles the mirror image of the given combination

Discussion

9.	Decibel is unit of
Answer» Decibel is unit of

9.

Decibel is unit of

Answer»

Decibel is unit of

Discussion

10.	The source of energy of the sun is ___
Answer» The source of energy of the sun is ___

Discussion

11.	A body in equilibrium:
Answer» A body in equilibrium:

Discussion

12.	A 1.00 L balloon is filled with helium at 1.20 atm. If the balloon is squeezed into a 0.500 L beaker and doesn’t burst, what is the pressure of the helium?
Answer» A 1.00 L balloon is filled with helium at 1.20 atm. If the balloon is squeezed into a 0.500 L beaker and doesn’t burst, what is the pressure of the helium?

Discussion

13.	The change in volume of a fixed mass of a gas at constant pressure with varying temperature is governed by ___ law.
Answer» The change in volume of a fixed mass of a gas at constant pressure with varying temperature is governed by ___ law.

Discussion

14.	Explain how the anomalous expansion of water plays a major role in the sustenance of aquatic life in cold places? [3 MARKS]
Answer» Explain how the anomalous expansion of water plays a major role in the sustenance of aquatic life in cold places? [3 MARKS]

Discussion

15.	Comment on the direction of current inside and outside the voltaic cell and the polarity of the electrodes on connecting the electrodes externally with a piece of wire.
Answer» Comment on the direction of current inside and outside the voltaic cell and the polarity of the electrodes on connecting the electrodes externally with a piece of wire.

Discussion

16.	(a) Draw a graph between displacement and time for a body executing the natural vibrations. (b) Where can a body execute the natural vibrations ?
Answer» (a) Draw a graph between displacement and time for a body executing the natural vibrations. (b) Where can a body execute the natural vibrations ?

16.

(a) Draw a graph between displacement and time for a body executing the natural vibrations. (b) Where can a body execute the natural vibrations ?

Answer»

(a) Draw a graph between displacement and time for a body executing the natural vibrations.

(b) Where can a body execute the natural vibrations ?

Discussion

17.	A convex lens forms an image of an object equal to the size of the object. (a) Where is the object placed in front of the lens ? (b) Draw a diagram to illustrate it. (c) State two more characteristics of the image.
Answer» A convex lens forms an image of an object equal to the size of the object. (a) Where is the object placed in front of the lens ? (b) Draw a diagram to illustrate it. (c) State two more characteristics of the image.

Discussion

18.	A satellite of mass m is circulating around the earth with constant angular velocity. If radius of the orbit is Ro and mass of the earth M, the angular momentum about the centre of the earth is
Answer» A satellite of mass m is circulating around the earth with constant angular velocity. If radius of the orbit is $R_{o}$ and mass of the earth M, the angular momentum about the centre of the earth is

Discussion

19.	If a turbine is built in a fast flowing stream of river without building dam. What energy conversion will happen for power generation?
Answer» If a turbine is built in a fast flowing stream of river without building dam. What energy conversion will happen for power generation?

Discussion

20.	What is the relationship between reflection and refraction?
Answer» What is the relationship between reflection and refraction?

Discussion

21.	An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, the power consumed will be:
Answer» An electric bulb is rated $220 V$ and $100 W$ . When it is operated on $110 V$ , the power consumed will be:

Discussion

22.	How many laws of conservation are there universally?
Answer» How many laws of conservation are there universally?

Discussion

23.	For what position of an object, a concave mirror forms a real image equal in size to the object?
Answer» For what position of an object, a concave mirror forms a real image equal in size to the object?

Discussion

24.	What do you mean by nuclear fission?explain.Advantages as well as disadvantages of nuclear fission.
Answer» What do you mean by nuclear fission?explain.Advantages as well as disadvantages of nuclear fission.

Discussion

25.	A person rubbed two glass rods using a silk cloth and turns out that the glass rods started to move away from each other slightly when they were placed together. What could possibly be the reason?
Answer» A person rubbed two glass rods using a silk cloth and turns out that the glass rods started to move away from each other slightly when they were placed together. What could possibly be the reason?

Discussion

26.	250 g of ice at 0∘C converts into water at 0∘C in a minute when a constant heat is supplied. In how much time (sec) the water thus obtained will change to 20∘C? The specific latent heat of ice is 336 J g−1. The specific heat capacity of water is 4.2 J g−1 ∘C−1.15
Answer» $250 g$ of ice at $0^{\circ} C$ converts into water at $0^{\circ} C$ in a minute when a constant heat is supplied. In how much time (sec) the water thus obtained will change to $20^{\circ} C$ ? The specific latent heat of ice is $336 J g^{- 1}$ . The specific heat capacity of water is $4.2 J g^{- 1}^{\circ} C^{- 1}$ . 15

Discussion

27.	Question 1 (b) Judge the equivalent resistance when the following are connected in parallel – (b)1Ω and 103Ω and 106Ω.
Answer» Question 1 (b) Judge the equivalent resistance when the following are connected in parallel – $(b) 1 Ω a n d 10^{3} Ω a n d 10^{6} Ω$ .

Discussion

28.	The maximum magnifying power of a convex lens of focal length 5 cm can be : (a) 25 (b) 10 (c) 1 (d) 6
Answer» The maximum magnifying power of a convex lens of focal length 5 cm can be : (a) 25 (b) 10 (c) 1 (d) 6

28.

The maximum magnifying power of a convex lens of focal length 5 cm can be : (a) 25 (b) 10 (c) 1 (d) 6

Answer»

The maximum magnifying power of a convex lens of focal length 5 cm can be :

(a) 25 (b) 10

(c) 1 (d) 6

Discussion

29.	The focal length of a concave lens is:
Answer» The focal length of a concave lens is:

Discussion

30.	The potential difference between the terminals of an electric heater is 60V when it draws a current of 4A from the source. What current will the heater draw if the potential difference is increased to 120V
Answer» The potential difference between the terminals of an electric heater is 60V when it draws a current of 4A from the source. What current will the heater draw if the potential difference is increased to 120V

Discussion

31.	An electric heater can boil a certain amount of water in 10 minutes and another heater can do it in 15 minutes, both working at the same voltage. If the two heaters are connected parallel across the same voltage as before, how much time will they take to boil the same amount of water?
Answer» An electric heater can boil a certain amount of water in 10 minutes and another heater can do it in 15 minutes, both working at the same voltage. If the two heaters are connected parallel across the same voltage as before, how much time will they take to boil the same amount of water?

Discussion

32.	what special property does the north pole of a magnet possess or why is that the all the magnetic field lines starts or originates from it and ends or goes in to the South Pole.
Answer» what special property does the north pole of a magnet possess or why is that the all the magnetic field lines starts or originates from it and ends or goes in to the South Pole.

Discussion

33.	The power of a lens is, - 2 D. What is its focal length ?
Answer» The power of a lens is, - 2 D. What is its focal length ?

Discussion

34.	A bulb draws a current of 0.20 A for 15 minutes. What is the amount of electric charge that flows through it?
Answer» A bulb draws a current of 0.20 A for 15 minutes. What is the amount of electric charge that flows through it?

Discussion

35.	A man standing in front of a vertical cliff fires a gun and hears the echo after 2 seconds. Find the distance of the cliff from his position. (Assume velocity of sound is 360 m/s)
Answer» A man standing in front of a vertical cliff fires a gun and hears the echo after $2$ seconds. Find the distance of the cliff from his position. (Assume velocity of sound is $360 m / s$ )

Discussion

36.	Give three examples of materials that refract light rays. What happens to the speed of light rays when they enter these materials ?
Answer» Give three examples of materials that refract light rays. What happens to the speed of light rays when they enter these materials ?

Discussion

37.	The process by which a beam of white light splits into its constituent colours is known as ________.
Answer» The process by which a beam of white light splits into its constituent colours is known as ________.

Discussion

38.	If a person can see distant objects clearly, but cannot see nearby objects clearly, then the person is said to be affected from which of the following defects?
Answer» If a person can see distant objects clearly, but cannot see nearby objects clearly, then the person is said to be affected from which of the following defects?

Discussion

39.	Complete the following sentence : All the distances are measured from the___ of a spherical mirror.
Answer» Complete the following sentence : All the distances are measured from the___ of a spherical mirror.

Discussion

40.	In the system shown in figure blocks A and B have mass m1=2kg and m2=267 kg respectively. Pulley having moment of inertia I = 0.11 kg m2 can rotate without friction about a fixed axis. Inner and outer radii of pulley are a = 10 cm and b = 15 cm respectively. B is hanging with the thread wrapped around the pulley, while A lies on a rough inclined plane. Coefficient of friction being μ=√310 ColumnIColumnIIP.Tension in the thread connecting block Aw.26NQ.Tension in the thread connecting block Bx.2ms2R accelerationofAR.Acceleration of Ay.3ms2S.Acceleration of Bz.17N
Answer» In the system shown in figure blocks A and B have mass $m_{1} = 2 k g a n d m_{2} = \frac{26}{7}$ kg respectively. Pulley having moment of inertia I = 0.11 kg $m^{2}$ can rotate without friction about a fixed axis. Inner and outer radii of pulley are a = 10 cm and b = 15 cm respectively. B is hanging with the thread wrapped around the pulley, while A lies on a rough inclined plane. Coefficient of friction being $μ = \frac{\sqrt{3}}{10}$ $\begin{matrix} C o l u m n I & C o l u m n I I P . Tension in the thread connecting block A & w . 26 N Q . Tension in the thread connecting block B & x .2 \frac{m}{s^{2}} R a c c e l e r a t i o n o f A R . Acceleration of A & y .3 \frac{m}{s^{2}} S . Acceleration of B & z . 17 N \end{matrix}$

40.

In the system shown in figure blocks A and B have mass m1=2kg and m2=267 kg respectively. Pulley having moment of inertia I = 0.11 kg m2 can rotate without friction about a fixed axis. Inner and outer radii of pulley are a = 10 cm and b = 15 cm respectively. B is hanging with the thread wrapped around the pulley, while A lies on a rough inclined plane. Coefficient of friction being μ=√310 ColumnIColumnIIP.Tension in the thread connecting block Aw.26NQ.Tension in the thread connecting block Bx.2ms2R accelerationofAR.Acceleration of Ay.3ms2S.Acceleration of Bz.17N

Answer»

In the system shown in figure blocks A and B have mass $m_{1} = 2 k g a n d m_{2} = \frac{26}{7}$ kg respectively. Pulley having moment of inertia I = 0.11 kg $m^{2}$ can rotate without friction about a fixed axis. Inner and outer radii of pulley are a = 10 cm and b = 15 cm respectively. B is hanging with the thread wrapped around the pulley, while A lies on a rough inclined plane.

Coefficient of friction being $μ = \frac{\sqrt{3}}{10}$

$\begin{matrix} C o l u m n I & C o l u m n I I P . Tension in the thread connecting block A & w . 26 N Q . Tension in the thread connecting block B & x .2 \frac{m}{s^{2}} R a c c e l e r a t i o n o f A R . Acceleration of A & y .3 \frac{m}{s^{2}} S . Acceleration of B & z . 17 N \end{matrix}$

Discussion

41.	The statement that is most correct about the following circuit is: A1, A2, & A3 are readings of ammeter.
Answer» The statement that is most correct about the following circuit is: $A_{1}, A_{2}, & A_{3}$ are readings of ammeter.

Discussion

42.	Ohm's law gives a relationship between: (a) current and resistance (b) resistance and potential difference (c) Potential difference and electric charge (d) current and potential difference
Answer» Ohm's law gives a relationship between: (a) current and resistance (b) resistance and potential difference (c) Potential difference and electric charge (d) current and potential difference

Discussion

43.	Find the equivalent resistance between points A and B of the network shown below.
Answer» Find the equivalent resistance between points A and B of the network shown below.

Discussion

44.	A parachutist jumps off a helicopter and is descending at a steady velocity. How does the steady velocity get affected if he uses a larger parachute? Explain.
Answer» A parachutist jumps off a helicopter and is descending at a steady velocity. How does the steady velocity get affected if he uses a larger parachute? Explain.

Discussion

45.	Which of the following is an example of living thing which emits light?
Answer» Which of the following is an example of living thing which emits light?

Discussion

46.	If the people of Bangalore start using public transport more than their personal vehicles. Then above activity belongs to, which strategy?
Answer» If the people of Bangalore start using public transport more than their personal vehicles. Then above activity belongs to, which strategy?

Discussion

47.	List any 2 causes for depletion of underground water.
Answer» List any 2 causes for depletion of underground water.

Discussion

48.	Name the physical quantities of which the units are : (i) volt, (ii) coulomb, (iii) ohm, (iv) ampere.
Answer» Name the physical quantities of which the units are : (i) volt, (ii) coulomb, (iii) ohm, (iv) ampere.

Discussion

49.	Light is incident from air on oil at an angle of 30∘. After moving through oil-1 and another medium; oil-2, it enters glass and then it enters water. If the refractive indices of glass and water are 1.5 and 1.3, respectively, find the angle which the ray makes with normal in water.
Answer» Light is incident from air on oil at an angle of $30^{\circ}$ . After moving through oil-1 and another medium; oil-2, it enters glass and then it enters water. If the refractive indices of glass and water are 1.5 and 1.3, respectively, find the angle which the ray makes with normal in water.

Discussion

50.	Draw the following diagram in your answer book and show the formation of image of the object AB with the help of suitable rays :
Answer» Draw the following diagram in your answer book and show the formation of image of the object AB with the help of suitable rays :

50.

Draw the following diagram in your answer book and show the formation of image of the object AB with the help of suitable rays :

Answer»

Draw the following diagram in your answer book and show the formation of image of the object AB with the help of suitable rays :

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A watch glass has uniform thickness and the average radius of curvature of its two surfaces is much larger than its thickness. It is placed in the path of a beam of parallel light, the beam will

State any two uses of convex lenses.

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

A body travelling at a speed greater than that of sound is said to be travelling at ___.

A ray of light is incident normally on a plane mirror. What will be the : (a) angle of incidence ? (b) angle of reflection ?

Choose the alternative which is closely resembles the mirror image of the given combination

Decibel is unit of

The source of energy of the sun is ___

A body in equilibrium:

A 1.00 L balloon is filled with helium at 1.20 atm. If the balloon is squeezed into a 0.500 L beaker and doesn’t burst, what is the pressure of the helium?

The change in volume of a fixed mass of a gas at constant pressure with varying temperature is governed by ___ law.

Explain how the anomalous expansion of water plays a major role in the sustenance of aquatic life in cold places? [3 MARKS]

Comment on the direction of current inside and outside the voltaic cell and the polarity of the electrodes on connecting the electrodes externally with a piece of wire.

(a) Draw a graph between displacement and time for a body executing the natural vibrations. (b) Where can a body execute the natural vibrations ?

A convex lens forms an image of an object equal to the size of the object. (a) Where is the object placed in front of the lens ? (b) Draw a diagram to illustrate it. (c) State two more characteristics of the image.

A satellite of mass m is circulating around the earth with constant angular velocity. If radius of the orbit is Ro and mass of the earth M, the angular momentum about the centre of the earth is

If a turbine is built in a fast flowing stream of river without building dam. What energy conversion will happen for power generation?

What is the relationship between reflection and refraction?

An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, the power consumed will be:

How many laws of conservation are there universally?

For what position of an object, a concave mirror forms a real image equal in size to the object?

What do you mean by nuclear fission?explain.Advantages as well as disadvantages of nuclear fission.

A person rubbed two glass rods using a silk cloth and turns out that the glass rods started to move away from each other slightly when they were placed together. What could possibly be the reason?

250 g of ice at 0∘C converts into water at 0∘C in a minute when a constant heat is supplied. In how much time (sec) the water thus obtained will change to 20∘C? The specific latent heat of ice is 336 J g−1. The specific heat capacity of water is 4.2 J g−1 ∘C−1.15

Question 1 (b) Judge the equivalent resistance when the following are connected in parallel – (b)1Ω and 103Ω and 106Ω.

The maximum magnifying power of a convex lens of focal length 5 cm can be : (a) 25 (b) 10 (c) 1 (d) 6

The focal length of a concave lens is:

The potential difference between the terminals of an electric heater is 60V when it draws a current of 4A from the source. What current will the heater draw if the potential difference is increased to 120V

An electric heater can boil a certain amount of water in 10 minutes and another heater can do it in 15 minutes, both working at the same voltage. If the two heaters are connected parallel across the same voltage as before, how much time will they take to boil the same amount of water?

what special property does the north pole of a magnet possess or why is that the all the magnetic field lines starts or originates from it and ends or goes in to the South Pole.

The power of a lens is, - 2 D. What is its focal length ?

A bulb draws a current of 0.20 A for 15 minutes. What is the amount of electric charge that flows through it?

A man standing in front of a vertical cliff fires a gun and hears the echo after 2 seconds. Find the distance of the cliff from his position. (Assume velocity of sound is 360 m/s)

Give three examples of materials that refract light rays. What happens to the speed of light rays when they enter these materials ?

The process by which a beam of white light splits into its constituent colours is known as ________.

If a person can see distant objects clearly, but cannot see nearby objects clearly, then the person is said to be affected from which of the following defects?

Complete the following sentence : All the distances are measured from the___ of a spherical mirror.

The statement that is most correct about the following circuit is: A1, A2, &amp; A3 are readings of ammeter.

Ohm's law gives a relationship between: (a) current and resistance (b) resistance and potential difference (c) Potential difference and electric charge (d) current and potential difference

Find the equivalent resistance between points A and B of the network shown below.

A parachutist jumps off a helicopter and is descending at a steady velocity. How does the steady velocity get affected if he uses a larger parachute? Explain.

Which of the following is an example of living thing which emits light?

If the people of Bangalore start using public transport more than their personal vehicles. Then above activity belongs to, which strategy?

List any 2 causes for depletion of underground water.

Name the physical quantities of which the units are : (i) volt, (ii) coulomb, (iii) ohm, (iv) ampere.

Light is incident from air on oil at an angle of 30∘. After moving through oil-1 and another medium; oil-2, it enters glass and then it enters water. If the refractive indices of glass and water are 1.5 and 1.3, respectively, find the angle which the ray makes with normal in water.

Draw the following diagram in your answer book and show the formation of image of the object AB with the help of suitable rays :

The statement that is most correct about the following circuit is: A1, A2, & A3 are readings of ammeter.