16569 + Interview Questions in Physics

1.	What is the difference between watt and ampere?
Answer» What is the difference between watt and ampere?

Discussion

2.	ANSWER THE FOLLOWING QUESTION WITH EXPLANATION Q. If current through a resistance is increased by 100% simultaneously reducing resistance value to 25%, the new power dissipated will be 98888888888888888888888888888888888888888888888/
Answer» ANSWER THE FOLLOWING QUESTION WITH EXPLANATION Q. If current through a resistance is increased by 100% simultaneously reducing resistance value to 25%, the new power dissipated will be 98888888888888888888888888888888888888888888888/

Discussion

3.	Why do the component colours of incidet white light split into a spectrum while passing through a glass prism?
Answer» Why do the component colours of incidet white light split into a spectrum while passing through a glass prism?

Discussion

4.	The colour of white light which suffers the maximum bending (or maximum refraction) on passing through a glass prism is : (a) yellow (b) orange (c) red (d) violet
Answer» The colour of white light which suffers the maximum bending (or maximum refraction) on passing through a glass prism is : (a) yellow (b) orange (c) red (d) violet

Discussion

5.	If we have a solenoid carrying AC current in it, then the induced current in the another solenoid will be AC or DC?
Answer» If we have a solenoid carrying AC current in it, then the induced current in the another solenoid will be AC or DC?

Discussion

6.	How does a Voltmeter actually work? What is it's working? This is a little out of syllabus but I don't get how it works and what it's working has to do with high resistance.
Answer» How does a Voltmeter actually work? What is it's working? This is a little out of syllabus but I don't get how it works and what it's working has to do with high resistance.

Discussion

7.	Which of the following is true regarding Chandrayaan?
Answer» Which of the following is true regarding Chandrayaan?

Discussion

8.	Write one negative effect of affluent lifestyle of few persons in the environment.
Answer» Write one negative effect of affluent lifestyle of few persons in the environment.

Discussion

9.	If ve and vo represent the escape velocity and orbital velocity of a satellite corresponding to a circular orbit of radius R, then
Answer» If $v_{e}$ and $v_{o}$ represent the escape velocity and orbital velocity of a satellite corresponding to a circular orbit of radius R, then

Discussion

10.	What will happen to current flowing through a conductor if potential difference is doubled?
Answer» What will happen to current flowing through a conductor if potential difference is doubled?

Discussion

11.	In a circuit two resistances of the same material and cross section area but different lengths L1 and L2 are kept in series. Find the length of the equivalent resistance if it's made of the same material and same cross section area.
Answer» In a circuit two resistances of the same material and cross section area but different lengths $L_{1} a n d L_{2}$ are kept in series. Find the length of the equivalent resistance if it's made of the same material and same cross section area.

Discussion

12.	Why is the iron core of a transformer made laminated (thin sheets) instead of being in one solid piece?
Answer» Why is the iron core of a transformer made laminated (thin sheets) instead of being in one solid piece?

Discussion

13.	Different stages of power transmission and distribution are given in the following chart: Arrange the given terms in the above boxes in the correct order. Power generator, Substation, Star connection, Power transformer, Distribution transformer, Household connection. Which of the following is correctly matched?
Answer» Different stages of power transmission and distribution are given in the following chart: Arrange the given terms in the above boxes in the correct order. Power generator, Substation, Star connection, Power transformer, Distribution transformer, Household connection. Which of the following is correctly matched?

13.

Different stages of power transmission and distribution are given in the following chart: Arrange the given terms in the above boxes in the correct order. Power generator, Substation, Star connection, Power transformer, Distribution transformer, Household connection. Which of the following is correctly matched?

Answer»

Different stages of power transmission and distribution are given in the following chart:

Arrange the given terms in the above boxes in the correct order.

Power generator, Substation, Star connection, Power transformer, Distribution transformer, Household connection.

Which of the following is correctly matched?

Discussion

14.	Explain the term mechanical advantage. State its unit.
Answer» Explain the term mechanical advantage. State its unit.

Discussion

15.	What is refractive index ?
Answer» What is refractive index ?

Discussion

16.	A real image is ___.
Answer» A real image is ___.

Discussion

17.	A student obtained a sharp image of the grills of a window on a screen using a concave mirror. His teacher remarked that for getting better results a well lit distance object (preferably the sun) should be focussed on the screen. What should be done for this purpose?
Answer» A student obtained a sharp image of the grills of a window on a screen using a concave mirror. His teacher remarked that for getting better results a well lit distance object (preferably the sun) should be focussed on the screen. What should be done for this purpose?

Discussion

18.	What change is made in the eye to enable it to focus on objects situated at different distances ? Illustrate your answer with the help of diagrams.
Answer» What change is made in the eye to enable it to focus on objects situated at different distances ? Illustrate your answer with the help of diagrams.

Discussion

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

Discussion

20.	Give example of each class of lever in a human body.
Answer» Give example of each class of lever in a human body.

Discussion

21.	An object 4 cm high is placed at a distance of 10 cm from a convex lens of focal length 20 cm. Find the position, nature and size of the image.
Answer» An object 4 cm high is placed at a distance of 10 cm from a convex lens of focal length 20 cm. Find the position, nature and size of the image.

Discussion

22.	For CE transistor amplifier, the audio signal voltage across the collector resistance of 2 kΩ is 4V. If the current amplification factor of the transistor is 100 and the base resistance is 1 kΩ, then the input signal voltage is
Answer» For CE transistor amplifier, the audio signal voltage across the collector resistance of $2 k Ω$ is 4V. If the current amplification factor of the transistor is 100 and the base resistance is $1 k Ω$ , then the input signal voltage is

Discussion

23.	Which type of lens has (a) a positive power, and (b) a negative power ?
Answer» Which type of lens has (a) a positive power, and (b) a negative power ?

Discussion

24.	Why is the earth pin thicker and longer than the live and the neutral pins?
Answer» Why is the earth pin thicker and longer than the live and the neutral pins?

Discussion

25.	Statement 1: When the white light passes through a prism, it disperses into seven different colours and this phenomenon is known as dispersion. Statement 2: Refraction depends upon the wavelength of light and since different colours have different wavelengths. Hence, they are refracted at different angles and spectrum is formed.
Answer» Statement 1: When the white light passes through a prism, it disperses into seven different colours and this phenomenon is known as dispersion. Statement 2: Refraction depends upon the wavelength of light and since different colours have different wavelengths. Hence, they are refracted at different angles and spectrum is formed.

25.

Statement 1: When the white light passes through a prism, it disperses into seven different colours and this phenomenon is known as dispersion. Statement 2: Refraction depends upon the wavelength of light and since different colours have different wavelengths. Hence, they are refracted at different angles and spectrum is formed.

Answer»

Statement 1: When the white light passes through a prism, it disperses into seven different colours and this phenomenon is known as dispersion.

Statement 2: Refraction depends upon the wavelength of light and since different colours have different wavelengths. Hence, they are refracted at different angles and spectrum is formed.

Discussion

26.	State two factors on which the electrical energy consumed by an electrical appliance depends.
Answer» State two factors on which the electrical energy consumed by an electrical appliance depends.

Discussion

27.	How does the specific resistance of a semiconductor change with the increase in temperature?
Answer» How does the specific resistance of a semiconductor change with the increase in temperature?

Discussion

28.	Mention the kind of lens that can form Real and inverted and magnified image
Answer» Mention the kind of lens that can form Real and inverted and magnified image

Discussion

29.	An appliance has three wires of colors red, black and green, and is connected to a three pin plug. The thickest pin is connected to which wire?
Answer» An appliance has three wires of colors red, black and green, and is connected to a three pin plug. The thickest pin is connected to which wire?

Discussion

30.	Why resonance occurs?
Answer» Why resonance occurs?

Discussion

31.	The magnetic field lines due to a bar magnet are correctly shown in figure.
Answer» The magnetic field lines due to a bar magnet are correctly shown in figure.

Discussion

32.	Three coloured bands blue, green & red are painted at the bottom of a swimming pool. Which band will appear to be raised the most & why?
Answer» Three coloured bands blue, green & red are painted at the bottom of a swimming pool. Which band will appear to be raised the most & why?

Discussion

33.	You have a metal wire of length 1000 m, with a radius of 0.7 mm and resistivity of the metal is given as 153.86×10−6 Ω-m. Find the resistance of the wire.
Answer» You have a metal wire of length $1000 m$ , with a radius of $0.7 m m$ and resistivity of the metal is given as $153.86 \times 10^{- 6} Ω$ -m. Find the resistance of the wire.

Discussion

34.	Two resistors A and B of resistance 4 ohm and 6 ohm respectively are connected in parallel. The combination is connected across a 6 volt battery of negligible resistance. Calculate: (i) the power supplied by the battery, and (ii) the power dissipated in each resistor.
Answer» Two resistors A and B of resistance 4 ohm and 6 ohm respectively are connected in parallel. The combination is connected across a 6 volt battery of negligible resistance. Calculate: (i) the power supplied by the battery, and (ii) the power dissipated in each resistor.

Discussion

35.	What the difference between erect or virtual image?
Answer» What the difference between erect or virtual image?

Discussion

36.	What is the resistance of a conductor ? Mention the factors of the resistance of a conductor depend
Answer» What is the resistance of a conductor ? Mention the factors of the resistance of a conductor depend

Discussion

37.	Part of the eye containing the pigment that absorbs light and does not allow it to be reflected within the eye.
Answer» Part of the eye containing the pigment that absorbs light and does not allow it to be reflected within the eye.

Discussion

38.	There were a lot of organisms A in the crop fields in an area. These organisms used to feed on organisms B also present in the crop fields but which damaged the standing crops. One day some people arrived in the fields and killed all the organisms A so that they could remove their C for making fancy items which were in great demand. Due to the large-scale killing of A, the population of B increased too much damaging all the crops in the area and causing a famine-like situation. Apart from A, there is another organism D which can also kill and eat B. Name A, B, C and D.
Answer» There were a lot of organisms A in the crop fields in an area. These organisms used to feed on organisms B also present in the crop fields but which damaged the standing crops. One day some people arrived in the fields and killed all the organisms A so that they could remove their C for making fancy items which were in great demand. Due to the large-scale killing of A, the population of B increased too much damaging all the crops in the area and causing a famine-like situation. Apart from A, there is another organism D which can also kill and eat B. Name A, B, C and D.

Discussion

39.	Why to is said that frequency of light remain same in all media
Answer» Why to is said that frequency of light remain same in all media

Discussion

40.	An object of height 4.25 mm is placed at a distance of 10 cm from a convex lens of power +5 D. Find (i) focal length of the lens, and (ii) size of the image.
Answer» An object of height 4.25 mm is placed at a distance of 10 cm from a convex lens of power +5 D. Find (i) focal length of the lens, and (ii) size of the image.

Discussion

41.	Two blocks are placed on each other. Force F is applied to the lower block. What happens to the upper block when the lower block moves? Assume that all surfaces are frictionless.
Answer» Two blocks are placed on each other. Force F is applied to the lower block. What happens to the upper block when the lower block moves? Assume that all surfaces are frictionless.

Discussion

42.	What is positive test charge?
Answer» What is positive test charge?

Discussion

43.	What is the separation between a concave mirror and paper sheet having a bright sharp spot of light(sunlight).
Answer» What is the separation between a concave mirror and paper sheet having a bright sharp spot of light(sunlight).

Discussion

44.	What is the purpose of resistors in a circuit?
Answer» What is the purpose of resistors in a circuit?

Discussion

45.	A ray of light strikes a plane mirror such that its angle of incidence is 30∘. What angle does the reflected ray make with the mirror surface?
Answer» A ray of light strikes a plane mirror such that its angle of incidence is $30^{\circ}$ . What angle does the reflected ray make with the mirror surface?

Discussion

46.	Which of the following cannot be termed as force?
Answer» Which of the following cannot be termed as force?

Discussion

47.	Law of refraction of light can be represented effectively as:
Answer» Law of refraction of light can be represented effectively as:

Discussion

48.	A pulley system has velocity ratio of 3. If it efficiency is 75%, calculate the distance by which the load is raised, if the effort pulls in 12 m of rope.
Answer» A pulley system has velocity ratio of 3. If it efficiency is 75%, calculate the distance by which the load is raised, if the effort pulls in 12 m of rope.

Discussion

49.	State the kind of lever which always has the mechanical advantage less than 1. Draw a labelled diagram of such a lever.
Answer» State the kind of lever which always has the mechanical advantage less than 1. Draw a labelled diagram of such a lever.

Discussion

50.	A boy of mass m climbs up the stairs of vertical height h. (a) What is the work done by the boy against the force of gravity? (b) What would have been the work done if he uses a lift in climbing the same vertical height?
Answer» A boy of mass m climbs up the stairs of vertical height h. (a) What is the work done by the boy against the force of gravity? (b) What would have been the work done if he uses a lift in climbing the same vertical height?

50.

A boy of mass m climbs up the stairs of vertical height h. (a) What is the work done by the boy against the force of gravity? (b) What would have been the work done if he uses a lift in climbing the same vertical height?

Answer»

A boy of mass m climbs up the stairs of vertical height h.

(a) What is the work done by the boy against the force of gravity?

(b) What would have been the work done if he uses a lift in climbing the same vertical height?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is the difference between watt and ampere?

ANSWER THE FOLLOWING QUESTION WITH EXPLANATION Q. If current through a resistance is increased by 100% simultaneously reducing resistance value to 25%, the new power dissipated will be 98888888888888888888888888888888888888888888888/

Why do the component colours of incidet white light split into a spectrum while passing through a glass prism?

The colour of white light which suffers the maximum bending (or maximum refraction) on passing through a glass prism is : (a) yellow (b) orange (c) red (d) violet

If we have a solenoid carrying AC current in it, then the induced current in the another solenoid will be AC or DC?

How does a Voltmeter actually work? What is it's working? This is a little out of syllabus but I don't get how it works and what it's working has to do with high resistance.

Which of the following is true regarding Chandrayaan?

Write one negative effect of affluent lifestyle of few persons in the environment.

If ve and vo represent the escape velocity and orbital velocity of a satellite corresponding to a circular orbit of radius R, then

What will happen to current flowing through a conductor if potential difference is doubled?

In a circuit two resistances of the same material and cross section area but different lengths L1 and L2 are kept in series. Find the length of the equivalent resistance if it's made of the same material and same cross section area.

Why is the iron core of a transformer made laminated (thin sheets) instead of being in one solid piece?

Explain the term mechanical advantage. State its unit.

What is refractive index ?

A real image is ___.

A student obtained a sharp image of the grills of a window on a screen using a concave mirror. His teacher remarked that for getting better results a well lit distance object (preferably the sun) should be focussed on the screen. What should be done for this purpose?

What change is made in the eye to enable it to focus on objects situated at different distances ? Illustrate your answer with the help of diagrams.

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

Give example of each class of lever in a human body.

An object 4 cm high is placed at a distance of 10 cm from a convex lens of focal length 20 cm. Find the position, nature and size of the image.

For CE transistor amplifier, the audio signal voltage across the collector resistance of 2 kΩ is 4V. If the current amplification factor of the transistor is 100 and the base resistance is 1 kΩ, then the input signal voltage is

Which type of lens has (a) a positive power, and (b) a negative power ?

Why is the earth pin thicker and longer than the live and the neutral pins?

State two factors on which the electrical energy consumed by an electrical appliance depends.

How does the specific resistance of a semiconductor change with the increase in temperature?

Mention the kind of lens that can form Real and inverted and magnified image

An appliance has three wires of colors red, black and green, and is connected to a three pin plug. The thickest pin is connected to which wire?

Why resonance occurs?

The magnetic field lines due to a bar magnet are correctly shown in figure.

Three coloured bands blue, green &amp; red are painted at the bottom of a swimming pool. Which band will appear to be raised the most &amp; why?

You have a metal wire of length 1000 m, with a radius of 0.7 mm and resistivity of the metal is given as 153.86×10−6 Ω-m. Find the resistance of the wire.

Two resistors A and B of resistance 4 ohm and 6 ohm respectively are connected in parallel. The combination is connected across a 6 volt battery of negligible resistance. Calculate: (i) the power supplied by the battery, and (ii) the power dissipated in each resistor.

What the difference between erect or virtual image?

What is the resistance of a conductor ? Mention the factors of the resistance of a conductor depend

Part of the eye containing the pigment that absorbs light and does not allow it to be reflected within the eye.

Why to is said that frequency of light remain same in all media

An object of height 4.25 mm is placed at a distance of 10 cm from a convex lens of power +5 D. Find (i) focal length of the lens, and (ii) size of the image.

Two blocks are placed on each other. Force F is applied to the lower block. What happens to the upper block when the lower block moves? Assume that all surfaces are frictionless.

What is positive test charge?

What is the separation between a concave mirror and paper sheet having a bright sharp spot of light(sunlight).

What is the purpose of resistors in a circuit?

A ray of light strikes a plane mirror such that its angle of incidence is 30∘. What angle does the reflected ray make with the mirror surface?

Which of the following cannot be termed as force?

Law of refraction of light can be represented effectively as:

A pulley system has velocity ratio of 3. If it efficiency is 75%, calculate the distance by which the load is raised, if the effort pulls in 12 m of rope.

State the kind of lever which always has the mechanical advantage less than 1. Draw a labelled diagram of such a lever.

A boy of mass m climbs up the stairs of vertical height h. (a) What is the work done by the boy against the force of gravity? (b) What would have been the work done if he uses a lift in climbing the same vertical height?

Three coloured bands blue, green & red are painted at the bottom of a swimming pool. Which band will appear to be raised the most & why?