16569 + Interview Questions in Physics

1.	Expand the abbreviation GAP.
Answer» Expand the abbreviation GAP.

Discussion

2.	Which one of the following is an example of class I lever and M.A >1?
Answer» Which one of the following is an example of class I lever and M.A >1?

Discussion

3.	A uniform magentic field exists in space. A particle of mass m and charges q is projected towards negative x-axis with speed v from a point (d, 0, 0). The maximum value of v for which the particle does not hit the y-z plane is
Answer» A uniform magentic field exists in space. A particle of mass m and charges q is projected towards negative x-axis with speed v from a point (d, 0, 0). The maximum value of v for which the particle does not hit the y-z plane is

Discussion

4.	Which among the following elements in the given circuit is the load ?
Answer» Which among the following elements in the given circuit is the load ?

Discussion

5.	Two objects of mass M and m are separated by a distance r. The gravitational force between the two objects quantitatively is ___ .
Answer» Two objects of mass M and m are separated by a distance r. The gravitational force between the two objects quantitatively is ___ .

Discussion

6.	Among the following statements, the statement that does not hold true for shortsightedness is
Answer» Among the following statements, the statement that does not hold true for shortsightedness is

Discussion

7.	Why we will not get any energy if we try to eat coal?
Answer» Why we will not get any energy if we try to eat coal?

Discussion

8.	Question 4 The change in focal length of an eye lens is caused by the action of the (a) pupil (b) retina (c) ciliary muscles (d) iris
Answer» Question 4 The change in focal length of an eye lens is caused by the action of the (a) pupil (b) retina (c) ciliary muscles (d) iris

Discussion

9.	Which is the common name for the top layer of the zone of saturation?
Answer» Which is the common name for the top layer of the zone of saturation?

Discussion

10.	Ten bulbs are connected in a series circuit to a power supply line. Ten identical bulbs are connected in a parallel circuit to an identical power supply line. (a) Which circuit would have the highest voltage across each bulb? (b) In which circuit would the bulbs be brighter? (c) In which circuit, if one bulb blows out, all others will stop glowing? (d) Which circuit would have less current in it?
Answer» Ten bulbs are connected in a series circuit to a power supply line. Ten identical bulbs are connected in a parallel circuit to an identical power supply line. (a) Which circuit would have the highest voltage across each bulb? (b) In which circuit would the bulbs be brighter? (c) In which circuit, if one bulb blows out, all others will stop glowing? (d) Which circuit would have less current in it?

Discussion

11.	Match the column:
Answer» Match the column:

11.

Match the column:

Answer»

Match the column:

Discussion

12.	(a) Explain what is meant by a virtual, magnified image. (b) Draw a ray diagram to show the formation of a virtual magnified image of an object by a convex lens. In your diagram, the position of object and image with respect to the principal focus should be shown clearly. (c) Three convex lenses are available having focal lengths of 4 cm, 40 cm and 4 m respectively. Which one would you choose as a magnifying glass and why ?
Answer» (a) Explain what is meant by a virtual, magnified image. (b) Draw a ray diagram to show the formation of a virtual magnified image of an object by a convex lens. In your diagram, the position of object and image with respect to the principal focus should be shown clearly. (c) Three convex lenses are available having focal lengths of 4 cm, 40 cm and 4 m respectively. Which one would you choose as a magnifying glass and why ?

Discussion

13.	How is the mechanical advantage related to the velocity ratio for an ideal machine?
Answer» How is the mechanical advantage related to the velocity ratio for an ideal machine?

Discussion

14.	If the reading on the pitch scale crossed by the head scale is P.S.R, the head scale division that coincides with the pitch scale axis be H.S.C and the zero correction is Z.C, then what is the formula to find the diameter of the wire?
Answer» If the reading on the pitch scale crossed by the head scale is P.S.R, the head scale division that coincides with the pitch scale axis be H.S.C and the zero correction is Z.C, then what is the formula to find the diameter of the wire?

Discussion

15.	Study the following diagram and select the correct statement about the device 'X' :
Answer» Study the following diagram and select the correct statement about the device 'X' :

Discussion

16.	Which of the following is a gas released by the usage of petroleum and coal but not poisonous?
Answer» Which of the following is a gas released by the usage of petroleum and coal but not poisonous?

Discussion

17.	In the figure given alongside, a narrow beam of white light is shown to pass through a triangular glass prism. After passing through the prism, it produces a stectrum YX on the screen. (a) State the colour seen (i ) at X, and (ii) at Y. (b) Why do different colours of white light bend through different angles with respect to the incident beam of light ?
Answer» In the figure given alongside, a narrow beam of white light is shown to pass through a triangular glass prism. After passing through the prism, it produces a stectrum YX on the screen. (a) State the colour seen (i ) at X, and (ii) at Y. (b) Why do different colours of white light bend through different angles with respect to the incident beam of light ?

Discussion

18.	The image formed by a spherical mirror is virtual. The mirror will be : (a) concave (b) convex , (c) either concave or convex (d) metallic
Answer» The image formed by a spherical mirror is virtual. The mirror will be : (a) concave (b) convex , (c) either concave or convex (d) metallic

Discussion

19.	As shown in the diagram, there is a magnetic field within a region of space. The magnetic field strength is the greatest at
Answer» As shown in the diagram, there is a magnetic field within a region of space. The magnetic field strength is the greatest at

Discussion

20.	When light enters normally into turpentine oil from air, its speed ___
Answer» When light enters normally into turpentine oil from air, its speed ___

Discussion

21.	The figure given alongside shows the image of a clock as seen in a plane mirror. The correct time is : (a) 2.25 (b) 2.35 (c) 6.45 (d) 9.25
Answer» The figure given alongside shows the image of a clock as seen in a plane mirror. The correct time is : (a) 2.25 (b) 2.35 (c) 6.45 (d) 9.25

21.

The figure given alongside shows the image of a clock as seen in a plane mirror. The correct time is : (a) 2.25 (b) 2.35 (c) 6.45 (d) 9.25

Answer»

The figure given alongside shows the image of a clock as seen in a plane mirror. The correct time is : (a) 2.25 (b) 2.35 (c) 6.45 (d) 9.25

Discussion

22.	Fermat’s Theorem states that:
Answer» Fermat’s Theorem states that:

Discussion

23.	A concave mirror has a focal length of 20 cm. Find the position or positions of an object for which the image-size is double of the object size.
Answer» A concave mirror has a focal length of 20 cm. Find the position or positions of an object for which the image-size is double of the object size.

Discussion

24.	What are the differences between mass and charge?
Answer» What are the differences between mass and charge?

Discussion

25.	Q21. Consider the following statements: 1. Indian Neutrino observatory is promoted by the Tata Institute of Fundamental Research. 2. INO is planned to be located in Theni District of Kerala. Which of the statements are correct?
Answer» Q21. Consider the following statements: 1. Indian Neutrino observatory is promoted by the Tata Institute of Fundamental Research. 2. INO is planned to be located in Theni District of Kerala. Which of the statements are correct?

25.

Q21. Consider the following statements: 1. Indian Neutrino observatory is promoted by the Tata Institute of Fundamental Research. 2. INO is planned to be located in Theni District of Kerala. Which of the statements are correct?

Answer»

Q21. Consider the following statements:

1. Indian Neutrino observatory is promoted by the Tata Institute of Fundamental Research.

2. INO is planned to be located in Theni District of Kerala.

Which of the statements are correct?

Discussion

26.	Match the following Physical StateSymbol1.Peak in sound waves(A) lambda(λ)2.Valley in sound waves(B) crest 3.Wavelength(C) trough
Answer» Match the following $\begin{matrix} P h y s i c a l S t a t e & S y m b o l 1. P e a k i n s o u n d w a v e s & (A) l a m b d a (λ) 2. V a l l e y i n s o u n d w a v e s & (B) c r e s t 3. W a v e l e n g t h & (C) t r o u g h \end{matrix}$

26.

Match the following Physical StateSymbol1.Peak in sound waves(A) lambda(λ)2.Valley in sound waves(B) crest 3.Wavelength(C) trough

Answer»

Match the following

$\begin{matrix} P h y s i c a l S t a t e & S y m b o l 1. P e a k i n s o u n d w a v e s & (A) l a m b d a (λ) 2. V a l l e y i n s o u n d w a v e s & (B) c r e s t 3. W a v e l e n g t h & (C) t r o u g h \end{matrix}$

Discussion

27.	What are the disadvantages of wind energy?
Answer» What are the disadvantages of wind energy?

Discussion

28.	The radius of curvature of a concave mirror is 12 cm. If I want to capture the image of the sun, at what distance from the pole of the mirror would an image be formed?6
Answer» The radius of curvature of a concave mirror is $12 cm$ . If I want to capture the image of the sun, at what distance from the pole of the mirror would an image be formed? 6

Discussion

29.	Two lenses of focal lengths f1 and f2 are placed side by side. What is the focal length of the composite lens?
Answer» Two lenses of focal lengths $f_{1}$ and $f_{2}$ are placed side by side. What is the focal length of the composite lens?

Discussion

30.	A cell with an EMF of 25 V and an internal resistance of 80 Ω, is connected to a 45 Ω resistor in series. If another resistor of resistance 22.5 Ω is connected in parallel to the 80 Ω resistor, what is the percentage decrease in the terminal voltage of the cell?56.1
Answer» A cell with an EMF of $25 V$ and an internal resistance of $80 Ω$ , is connected to a $45 Ω$ resistor in series. If another resistor of resistance $22.5 Ω$ is connected in parallel to the $80 Ω$ resistor, what is the percentage decrease in the terminal voltage of the cell? 56.1

Discussion

31.	Speed of light in vacuum is kms−1
Answer» Speed of light in vacuum is $k m s^{- 1}$

Discussion

32.	Two planets of radii r1 and r2 are made from the same material. The ratio of the acceleration due to gravity g1g2 at the surface of the two planets is
Answer» Two planets of radii $r_{1}$ and $r_{2}$ are made from the same material. The ratio of the acceleration due to gravity $\frac{g_{1}}{g_{2}}$ at the surface of the two planets is

Discussion

33.	A point object is placed at a distance of 18 cm from a convex lens on its principal axis. Its image is formed on the other side of the lens at 27 cm. Calculate the focal length of the lens.
Answer» A point object is placed at a distance of $18 c m$ from a convex lens on its principal axis. Its image is formed on the other side of the lens at $27 c m$ . Calculate the focal length of the lens.

Discussion

34.	A boy of height 155cm is standing in front of a plane mirror. The height of his image will be:
Answer» A boy of height $155 c m$ is standing in front of a plane mirror. The height of his image will be:

Discussion

35.	Out of the following bulbs rated 40W, 220V ,60W, 220V and 100W, 220V which one will glow the brightest when connected in series to a supply of 220V ?
Answer» Out of the following bulbs rated 40W, 220V ,60W, 220V and 100W, 220V which one will glow the brightest when connected in series to a supply of 220V ?

Discussion

36.	In an electric motor why only the brushes made up of carbon are used why not iron, copper etc.?
Answer» In an electric motor why only the brushes made up of carbon are used why not iron, copper etc.?

Discussion

37.	Why is AC used for long distance power transmission instead of DC?
Answer» Why is AC used for long distance power transmission instead of DC?

Discussion

38.	Which gas is filled in a bulb to prevent oxidation of tungsten wire?
Answer» Which gas is filled in a bulb to prevent oxidation of tungsten wire?

Discussion

39.	Explain nuclear fusion
Answer» Explain nuclear fusion

Discussion

40.	Advantage of nuclear energy
Answer» Advantage of nuclear energy

Discussion

41.	What is meant by 3 phase supply
Answer» What is meant by 3 phase supply

Discussion

42.	The thermal capacity will _______ if we make the base of the cooking pan thick.
Answer» The thermal capacity will _______ if we make the base of the cooking pan thick.

Discussion

43.	difference between overloading and short circuiting
Answer» difference between overloading and short circuiting

Discussion

44.	The force due to the magnetic field on a current carrying conductor is _______ to the magnetic field and_________ to the current.
Answer» The force due to the magnetic field on a current carrying conductor is _______ to the magnetic field and_________ to the current.

Discussion

45.	If angle of deviation, is the amount of bending of incident ray after reflection. Then find the correct representation of angle of deviation from the following option. The angle of deviation is marked in the option.
Answer» If angle of deviation, is the amount of bending of incident ray after reflection. Then find the correct representation of angle of deviation from the following option. The angle of deviation is marked in the option.

45.

If angle of deviation, is the amount of bending of incident ray after reflection. Then find the correct representation of angle of deviation from the following option. The angle of deviation is marked in the option.

Answer»

If angle of deviation, is the amount of bending of incident ray after reflection. Then find the correct representation of angle of deviation from the following option. The angle of deviation is marked in the option.

Discussion

46.	Describe briefly the 'Khadin' system of rainwater harvesting practised in Rajasthan.
Answer» Describe briefly the 'Khadin' system of rainwater harvesting practised in Rajasthan.

Discussion

47.	How is the reflection of light ray from a plane mirror different from the refraction of light ray as it enters a block of glass ?
Answer» How is the reflection of light ray from a plane mirror different from the refraction of light ray as it enters a block of glass ?

Discussion

48.	A device that is used to transform 12 V a.c. to 200 V a.c. is
Answer» A device that is used to transform 12 V a.c. to 200 V a.c. is

Discussion

49.	Fig. 1.33 shows a uniform metre rule placed on a fulcrum at its mid-point O and having a weight 40 gf at the 10 cm mark and a weight of 20 gf at the 90 cm mark. (i) Is the metre rule in equilibrium ? If not, how will the rule turn ? (ii) How can the rule be brought in equilibrium by using an additional weight of 40 gf ?
Answer» Fig. 1.33 shows a uniform metre rule placed on a fulcrum at its mid-point O and having a weight 40 gf at the 10 cm mark and a weight of 20 gf at the 90 cm mark. (i) Is the metre rule in equilibrium ? If not, how will the rule turn ? (ii) How can the rule be brought in equilibrium by using an additional weight of 40 gf ?

49.

Fig. 1.33 shows a uniform metre rule placed on a fulcrum at its mid-point O and having a weight 40 gf at the 10 cm mark and a weight of 20 gf at the 90 cm mark. (i) Is the metre rule in equilibrium ? If not, how will the rule turn ? (ii) How can the rule be brought in equilibrium by using an additional weight of 40 gf ?

Answer»

Fig. 1.33 shows a uniform metre rule placed on a fulcrum at its mid-point O and having a weight 40 gf at the 10 cm mark and a weight of 20 gf at the 90 cm mark. (i) Is the metre rule in equilibrium ? If not, how will the rule turn ? (ii) How can the rule be brought in equilibrium by using an additional weight of 40 gf ?

Discussion

50.	Refer to the diagram given below. What is the equivalent resistance between P and Q?
Answer» Refer to the diagram given below. What is the equivalent resistance between P and Q?

50.

Refer to the diagram given below. What is the equivalent resistance between P and Q?

Answer»

Refer to the diagram given below.

What is the equivalent resistance between P and Q?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Expand the abbreviation GAP.

Which one of the following is an example of class I lever and M.A &gt;1?

A uniform magentic field exists in space. A particle of mass m and charges q is projected towards negative x-axis with speed v from a point (d, 0, 0). The maximum value of v for which the particle does not hit the y-z plane is

Which among the following elements in the given circuit is the load ?

Two objects of mass M and m are separated by a distance r. The gravitational force between the two objects quantitatively is ___ .

Among the following statements, the statement that does not hold true for shortsightedness is

Why we will not get any energy if we try to eat coal?

Question 4 The change in focal length of an eye lens is caused by the action of the (a) pupil (b) retina (c) ciliary muscles (d) iris

Which is the common name for the top layer of the zone of saturation?

Match the column:

How is the mechanical advantage related to the velocity ratio for an ideal machine?

If the reading on the pitch scale crossed by the head scale is P.S.R, the head scale division that coincides with the pitch scale axis be H.S.C and the zero correction is Z.C, then what is the formula to find the diameter of the wire?

Study the following diagram and select the correct statement about the device 'X' :

Which of the following is a gas released by the usage of petroleum and coal but not poisonous?

The image formed by a spherical mirror is virtual. The mirror will be : (a) concave (b) convex , (c) either concave or convex (d) metallic

As shown in the diagram, there is a magnetic field within a region of space. The magnetic field strength is the greatest at

When light enters normally into turpentine oil from air, its speed ___

The figure given alongside shows the image of a clock as seen in a plane mirror. The correct time is : (a) 2.25 (b) 2.35 (c) 6.45 (d) 9.25

Fermat’s Theorem states that:

A concave mirror has a focal length of 20 cm. Find the position or positions of an object for which the image-size is double of the object size.

What are the differences between mass and charge?

Q21. Consider the following statements: 1. Indian Neutrino observatory is promoted by the Tata Institute of Fundamental Research. 2. INO is planned to be located in Theni District of Kerala. Which of the statements are correct?

Match the following Physical StateSymbol1.Peak in sound waves(A) lambda(λ)2.Valley in sound waves(B) crest 3.Wavelength(C) trough

What are the disadvantages of wind energy?

The radius of curvature of a concave mirror is 12 cm. If I want to capture the image of the sun, at what distance from the pole of the mirror would an image be formed?6

Two lenses of focal lengths f1 and f2 are placed side by side. What is the focal length of the composite lens?

A cell with an EMF of 25 V and an internal resistance of 80 Ω, is connected to a 45 Ω resistor in series. If another resistor of resistance 22.5 Ω is connected in parallel to the 80 Ω resistor, what is the percentage decrease in the terminal voltage of the cell?56.1

Speed of light in vacuum is kms−1

Two planets of radii r1 and r2 are made from the same material. The ratio of the acceleration due to gravity g1g2 at the surface of the two planets is

A point object is placed at a distance of 18 cm from a convex lens on its principal axis. Its image is formed on the other side of the lens at 27 cm. Calculate the focal length of the lens.

A boy of height 155cm is standing in front of a plane mirror. The height of his image will be:

Out of the following bulbs rated 40W, 220V ,60W, 220V and 100W, 220V which one will glow the brightest when connected in series to a supply of 220V ?

In an electric motor why only the brushes made up of carbon are used why not iron, copper etc.?

Why is AC used for long distance power transmission instead of DC?

Which gas is filled in a bulb to prevent oxidation of tungsten wire?

Explain nuclear fusion

Advantage of nuclear energy

What is meant by 3 phase supply

The thermal capacity will _______ if we make the base of the cooking pan thick.

difference between overloading and short circuiting

The force due to the magnetic field on a current carrying conductor is _______ to the magnetic field and_________ to the current.

If angle of deviation, is the amount of bending of incident ray after reflection. Then find the correct representation of angle of deviation from the following option. The angle of deviation is marked in the option.

Describe briefly the 'Khadin' system of rainwater harvesting practised in Rajasthan.

How is the reflection of light ray from a plane mirror different from the refraction of light ray as it enters a block of glass ?

A device that is used to transform 12 V a.c. to 200 V a.c. is

Refer to the diagram given below. What is the equivalent resistance between P and Q?

Which one of the following is an example of class I lever and M.A >1?

The force due to the magnetic field on a current carrying conductor is _ to the magnetic field and___ to the current.