16569 + Interview Questions in Physics

1.	A piece of iron of mass 2.0 kg has a thermal capacity of 966 J C−1. Its specific heat capacity in SI units is:
Answer» A piece of iron of mass 2.0 kg has a thermal capacity of 966 J $C^{- 1}$ . Its specific heat capacity in SI units is:

Discussion

2.	Question 3 The device used for producing electric current is called a (a) generator (b) galvanometer (c) ammeter (d) motor
Answer» Question 3 The device used for producing electric current is called a (a) generator (b) galvanometer (c) ammeter (d) motor

Discussion

3.	Why do objects appear black?
Answer» Why do objects appear black?

Discussion

4.	In an alpha decay, the mass number of an element decreases by ___
Answer» In an alpha decay, the mass number of an element decreases by ___

Discussion

5.	In the given diagram of a DC motor, the direction of flow of electrons in the left arm is:
Answer» In the given diagram of a DC motor, the direction of flow of electrons in the left arm is:

Discussion

6.	Match each ray with its name (i) reflected ray (ii) incident ray (iii) normal ray
Answer» Match each ray with its name (i) reflected ray (ii) incident ray (iii) normal ray

6.

Match each ray with its name (i) reflected ray (ii) incident ray (iii) normal ray

Answer»

Match each ray with its name

(i) reflected ray (ii) incident ray (iii) normal ray

Discussion

7.	A bulb is connected to 4 v and the internal resistance of circuit is 2.5 ohm. And 0.5 A flow through it. Find the energy dissipated in the bulb in 10 minutes and the resistance of the bulb
Answer» A bulb is connected to 4 v and the internal resistance of circuit is 2.5 ohm. And 0.5 A flow through it. Find the energy dissipated in the bulb in 10 minutes and the resistance of the bulb

Discussion

8.	At what temperature in ∘C will the volume of gas which is originally at 1∘C will double itself at constant pressure.
Answer» At what temperature in $^{\circ} C$ will the volume of gas which is originally at $1^{\circ} C$ will double itself at constant pressure.

Discussion

9.	While the sunset when sun appear red , as only red wavelength comes, when we place a prism and allow it to pass through it, will it refract or disperse?
Answer» While the sunset when sun appear red , as only red wavelength comes, when we place a prism and allow it to pass through it, will it refract or disperse?

Discussion

10.	Arrange the following colours in the increasing order of their wavelengths. Violet, Red, Green, Blue
Answer» Arrange the following colours in the increasing order of their wavelengths. Violet, Red, Green, Blue

10.

Arrange the following colours in the increasing order of their wavelengths. Violet, Red, Green, Blue

Answer»

Arrange the following colours in the increasing order of their wavelengths.

Violet, Red, Green, Blue

Discussion

11.	An iron rod consumes 400W of power, operating at 110V. What will be power consumption if it operates at 220V ?
Answer» An iron rod consumes 400W of power, operating at 110V. What will be power consumption if it operates at 220V ?

Discussion

12.	The law which is used to know the direction of magnetic field produced by a current carrying wire is
Answer» The law which is used to know the direction of magnetic field produced by a current carrying wire is

Discussion

13.	Two satellites of masses m1 and m2(m1>m2) are revolving round the earth in circular orbits of radius r1 and r2(r1>r2) respectively. Which of the following statements is true regarding their speeds v1 and v2?
Answer» Two satellites of masses $m_{1}$ and $m_{2} (m_{1} > m_{2})$ are revolving round the earth in circular orbits of radius $r_{1}$ and $r_{2} (r_{1} > r_{2})$ respectively. Which of the following statements is true regarding their speeds $v_{1}$ and $v_{2}$ ?

Discussion

14.	A glass of water at room temperature and a hot mug of coffee are placed on two tables inside a closed room. As the coffee cools down, what would happen to the temperature of the water?
Answer» A glass of water at room temperature and a hot mug of coffee are placed on two tables inside a closed room. As the coffee cools down, what would happen to the temperature of the water?

Discussion

15.	The lens which can produce a real and inverted image of an object is /are
Answer» The lens which can produce a real and inverted image of an object is /are

Discussion

16.	A compressed spring releases a toy of mass 50g attached to it at 200cm/s. Calculate the elastic PE of the compressed string.
Answer» A compressed spring releases a toy of mass 50g attached to it at 200cm/s. Calculate the elastic PE of the compressed string.

Discussion

17.	The red color of the sun at the time of sunrise and the sunset is because the red color is ___ scattered.
Answer» The red color of the sun at the time of sunrise and the sunset is because the red color is ___ scattered.

Discussion

18.	Calculate the heat capacity of a substance which requires 4000 J of heat to raise its temperature by 200C. Also calculate the SHC of the substance if its mass is 100 g.
Answer» Calculate the heat capacity of a substance which requires 4000 J of heat to raise its temperature by 20⁰C. Also calculate the SHC of the substance if its mass is 100 g.

Discussion

19.	A student has obtained a magnified image of a flame on a screen using a convex lens. To draw the corresponding ray diagram to show the image formation, which of the following two rays whose paths after refraction are shown, should he select?
Answer» A student has obtained a magnified image of a flame on a screen using a convex lens. To draw the corresponding ray diagram to show the image formation, which of the following two rays whose paths after refraction are shown, should he select?

19.

A student has obtained a magnified image of a flame on a screen using a convex lens. To draw the corresponding ray diagram to show the image formation, which of the following two rays whose paths after refraction are shown, should he select?

Answer»

A student has obtained a magnified image of a flame on a screen using a convex lens. To draw the corresponding ray diagram to show the image formation, which of the following two rays whose paths after refraction are shown, should he select?

Discussion

20.	Find the total cost of consumption of electrical energy in the following case, if electrical energy costs Rs. 2 per unit (kWhr) 1) 8 bulbs of 100 W each for 20 hrs 2) 500 W heater for 10 hours
Answer» Find the total cost of consumption of electrical energy in the following case, if electrical energy costs Rs. 2 per unit (kWhr) 1) 8 bulbs of 100 W each for 20 hrs 2) 500 W heater for 10 hours

20.

Find the total cost of consumption of electrical energy in the following case, if electrical energy costs Rs. 2 per unit (kWhr) 1) 8 bulbs of 100 W each for 20 hrs 2) 500 W heater for 10 hours

Answer»

Find the total cost of consumption of electrical energy in the following case, if electrical energy costs Rs. 2 per unit (kWhr)
1) 8 bulbs of 100 W each for 20 hrs

2) 500 W heater for 10 hours

Discussion

21.	Which of the following is not a life form in forest?
Answer» Which of the following is not a life form in forest?

Discussion

22.	An object is placed at a distance of 100 cm from a converging lens of focal length 40 cm. (i) What is the nature of image ? (ii) What is the position of image ?
Answer» An object is placed at a distance of 100 cm from a converging lens of focal length 40 cm. (i) What is the nature of image ? (ii) What is the position of image ?

Discussion

23.	The bulb in the circuit shown below does not glow. Which of the following labelled part is responsible for this?
Answer» The bulb in the circuit shown below does not glow. Which of the following labelled part is responsible for this?

Discussion

24.	If a force of 5 N gives a mass m1, an acceleration of 6 ms−2 and a mass m2, an acceleration of 24 ms−2. What acceleration would it give if both the masses are tied together?
Answer» If a force of 5 N gives a mass $m_{1}$ , an acceleration of 6 ${m s}^{- 2}$ and a mass $m_{2}$ , an acceleration of 24 ${m s}^{- 2}$ . What acceleration would it give if both the masses are tied together?

Discussion

25.	When a 0.5 kW heater operates for 20 minutes, the electrical energy consumed is equal to ___kJ.
Answer» When a 0.5 kW heater operates for 20 minutes, the electrical energy consumed is equal to ___kJ.

Discussion

26.	This is not particularly book related, but I m just curious wether the sun can engulf the earth during the red giant stage of its death
Answer» This is not particularly book related, but I m just curious wether the sun can engulf the earth during the red giant stage of its death

Discussion

27.	If lens I has focal length +15 cm and lens II has focal length + 30 cm. Which lens has more power?
Answer» If lens I has focal length +15 cm and lens II has focal length + 30 cm. Which lens has more power?

Discussion

28.	Q87. The South Asia Satellite launched by India will provide telecommunication links among which of the following countries? 1. Nepal 2. Myanmar 3. Pakistan 4. Afghanistan 5. Sri Lanka Select the correct code:
Answer» Q87. The South Asia Satellite launched by India will provide telecommunication links among which of the following countries? 1. Nepal 2. Myanmar 3. Pakistan 4. Afghanistan 5. Sri Lanka Select the correct code:

28.

Q87. The South Asia Satellite launched by India will provide telecommunication links among which of the following countries? 1. Nepal 2. Myanmar 3. Pakistan 4. Afghanistan 5. Sri Lanka Select the correct code:

Answer»

Q87. The South Asia Satellite launched by India will provide telecommunication links among which of the following countries?

1. Nepal 2. Myanmar

3. Pakistan 4. Afghanistan

5. Sri Lanka

Select the correct code:

Discussion

29.	A satellite of mass m and radius r is projected with a velocity v0 tangential to the surface of the earth (radius R and mass M) at the North Pole. Given r < < R). If that the satellite will go to infinity, for RV20=x GM. Find x ___
Answer» A satellite of mass m and radius r is projected with a velocity $v_{0}$ tangential to the surface of the earth (radius R and mass M) at the North Pole. Given r < < R). If that the satellite will go to infinity, for $R V_{0}^{2} = x G M$ . Find x ___

Discussion

30.	Why does a current carrying freely suspended solenoid rest along a particular direction? State the direction in which it rests.
Answer» Why does a current carrying freely suspended solenoid rest along a particular direction? State the direction in which it rests.

Discussion

31.	Two points have a potential difference of 10V. After connecting a conductor with zero resistance between the points, the final potential at each point becomes 25V. What could be their initial potentials?
Answer» Two points have a potential difference of 10V. After connecting a conductor with zero resistance between the points, the final potential at each point becomes 25V. What could be their initial potentials?

Discussion

32.	A convex mirror used as rear view mirror on an automobile has a radius of curvature of 3.00 m. If a bus is located at 5.00 m from this mirror, find the position, nature and size of the image.
Answer» A convex mirror used as rear view mirror on an automobile has a radius of curvature of 3.00 m. If a bus is located at 5.00 m from this mirror, find the position, nature and size of the image.

Discussion

33.	Is evolution of heat also a product?
Answer» Is evolution of heat also a product?

Discussion

34.	How does recombination of spectrum colours occur?
Answer» How does recombination of spectrum colours occur?

Discussion

35.	Define Hawking Radiation.
Answer» Define Hawking Radiation.

Discussion

36.	Answer figure
Answer» Answer figure

36.

Answer figure

Answer»

Answer figure

Discussion

37.	In the given circuit, calculate voltmeter reading across the parallel combination.
Answer» In the given circuit, calculate voltmeter reading across the parallel combination.

37.

In the given circuit, calculate voltmeter reading across the parallel combination.

Answer»

In the given circuit, calculate voltmeter reading across the parallel combination.

Discussion

38.	Sunlight is of Yellow or white colour? If it is yellow in colour than how sunlight can make seven colours? If it is White in colour than why do we see it in Yellow colour?
Answer» Sunlight is of Yellow or white colour? If it is yellow in colour than how sunlight can make seven colours? If it is White in colour than why do we see it in Yellow colour?

38.

Sunlight is of Yellow or white colour? If it is yellow in colour than how sunlight can make seven colours? If it is White in colour than why do we see it in Yellow colour?

Answer»

Sunlight is of Yellow or white colour?

If it is yellow in colour than how sunlight can make seven colours?

If it is White in colour than why do we see it in Yellow colour?

Discussion

39.	A concave mirror produces a magnification of + 4. The object is placed : (a) at the focus (b) between focus and centre of curvature (c) between focus and pole (d) beyond the centre of curvature
Answer» A concave mirror produces a magnification of + 4. The object is placed : (a) at the focus (b) between focus and centre of curvature (c) between focus and pole (d) beyond the centre of curvature

Discussion

40.	To determine the focal length of convex lens by obtaining a sharp image of a distant object we generally follow the following steps which are not in proper sequence. (a) Hold the lens between the object and the screen (b) Measure the distance between the lens and the screen (c) Select a well lit distant object (d) Adjust the position of the lens to form a sharp image
Answer» To determine the focal length of convex lens by obtaining a sharp image of a distant object we generally follow the following steps which are not in proper sequence. (a) Hold the lens between the object and the screen (b) Measure the distance between the lens and the screen (c) Select a well lit distant object (d) Adjust the position of the lens to form a sharp image

40.

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

Answer»

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

(a) Hold the lens between the object and the screen

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

(c) Select a well lit distant object

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

Discussion

41.	Vitamin D in plants are produced by which ray of Electromagnetic Spectrum?
Answer» Vitamin D in plants are produced by which ray of Electromagnetic Spectrum?

Discussion

42.	What are the disadvantages of using solar cell(solar power)?
Answer» What are the disadvantages of using solar cell(solar power)?

Discussion

43.	Which of these constituents present in air leads to the formation of fog and mist?
Answer» Which of these constituents present in air leads to the formation of fog and mist?

Discussion

44.	Why does the connecting cord of an electric heater not glow hot while the heating element does?
Answer» Why does the connecting cord of an electric heater not glow hot while the heating element does?

Discussion

45.	What is scattering of light ?
Answer» What is scattering of light ?

Discussion

46.	The back face of a circular loop of wire is found to be south magnetic pole. The direction of current in this face of the circular loop of wire will be : (a) towards south (b) clock wise (c) anticlockwise (d) towards north
Answer» The back face of a circular loop of wire is found to be south magnetic pole. The direction of current in this face of the circular loop of wire will be : (a) towards south (b) clock wise (c) anticlockwise (d) towards north

46.

The back face of a circular loop of wire is found to be south magnetic pole. The direction of current in this face of the circular loop of wire will be : (a) towards south (b) clock wise (c) anticlockwise (d) towards north

Answer»

The back face of a circular loop of wire is found to be south magnetic pole. The direction of current in this face of the circular loop of wire will be :

(a) towards south (b) clock wise (c) anticlockwise (d) towards north

Discussion

47.	A positively-charged particle (alpha-particle) projected towards the west is deflected towards the north by a magnetic field. The direction of magnetic field is
Answer» A positively-charged particle (alpha-particle) projected towards the west is deflected towards the north by a magnetic field. The direction of magnetic field is

Discussion

48.	Two waves of the same pitch have amplitudes in the ratio 1:3. What will be the ratio of their (i) loudness, and (ii) frequencies ?
Answer» Two waves of the same pitch have amplitudes in the ratio 1:3. What will be the ratio of their (i) loudness, and (ii) frequencies ?

Discussion

49.	Consider the following statements. A. In India, cropland occupies 57% of total area. B. Pastures account for 56% area in Australia C. About 23rd area in Japan is under forests. What should be understood from the above statements?
Answer» Consider the following statements. A. In India, cropland occupies 57% of total area. B. Pastures account for 56% area in Australia C. About ${\frac{2}{3}}^{r d}$ area in Japan is under forests. What should be understood from the above statements?

Discussion

50.	Sir what must we to do if the ask write down the beta decay process of an nuclei..... We must write beta positive or negative decay
Answer» Sir what must we to do if the ask write down the beta decay process of an nuclei..... We must write beta positive or negative decay

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A piece of iron of mass 2.0 kg has a thermal capacity of 966 J C−1. Its specific heat capacity in SI units is:

Question 3 The device used for producing electric current is called a (a) generator (b) galvanometer (c) ammeter (d) motor

Why do objects appear black?

In an alpha decay, the mass number of an element decreases by ___

In the given diagram of a DC motor, the direction of flow of electrons in the left arm is:

Match each ray with its name (i) reflected ray (ii) incident ray (iii) normal ray

A bulb is connected to 4 v and the internal resistance of circuit is 2.5 ohm. And 0.5 A flow through it. Find the energy dissipated in the bulb in 10 minutes and the resistance of the bulb

At what temperature in ∘C will the volume of gas which is originally at 1∘C will double itself at constant pressure.

While the sunset when sun appear red , as only red wavelength comes, when we place a prism and allow it to pass through it, will it refract or disperse?

Arrange the following colours in the increasing order of their wavelengths. Violet, Red, Green, Blue

An iron rod consumes 400W of power, operating at 110V. What will be power consumption if it operates at 220V ?

The law which is used to know the direction of magnetic field produced by a current carrying wire is

Two satellites of masses m1 and m2(m1&gt;m2) are revolving round the earth in circular orbits of radius r1 and r2(r1&gt;r2) respectively. Which of the following statements is true regarding their speeds v1 and v2?

A glass of water at room temperature and a hot mug of coffee are placed on two tables inside a closed room. As the coffee cools down, what would happen to the temperature of the water?

The lens which can produce a real and inverted image of an object is /are

A compressed spring releases a toy of mass 50g attached to it at 200cm/s. Calculate the elastic PE of the compressed string.

The red color of the sun at the time of sunrise and the sunset is because the red color is ___ scattered.

Calculate the heat capacity of a substance which requires 4000 J of heat to raise its temperature by 200C. Also calculate the SHC of the substance if its mass is 100 g.

A student has obtained a magnified image of a flame on a screen using a convex lens. To draw the corresponding ray diagram to show the image formation, which of the following two rays whose paths after refraction are shown, should he select?

Find the total cost of consumption of electrical energy in the following case, if electrical energy costs Rs. 2 per unit (kWhr) 1) 8 bulbs of 100 W each for 20 hrs 2) 500 W heater for 10 hours

Which of the following is not a life form in forest?

An object is placed at a distance of 100 cm from a converging lens of focal length 40 cm. (i) What is the nature of image ? (ii) What is the position of image ?

The bulb in the circuit shown below does not glow. Which of the following labelled part is responsible for this?

If a force of 5 N gives a mass m1​, an acceleration of 6 ms−2​ and a mass m2​, an acceleration of 24 ms−2​​. What acceleration would it give if both the masses are tied together?

When a 0.5 kW heater operates for 20 minutes, the electrical energy consumed is equal to ___kJ.

This is not particularly book related, but I m just curious wether the sun can engulf the earth during the red giant stage of its death

If lens I has focal length +15 cm and lens II has focal length + 30 cm. Which lens has more power?

Q87. The South Asia Satellite launched by India will provide telecommunication links among which of the following countries? 1. Nepal 2. Myanmar 3. Pakistan 4. Afghanistan 5. Sri Lanka Select the correct code:

A satellite of mass m and radius r is projected with a velocity v0 tangential to the surface of the earth (radius R and mass M) at the North Pole. Given r < < R). If that the satellite will go to infinity, for RV20=x GM. Find x ___

Why does a current carrying freely suspended solenoid rest along a particular direction? State the direction in which it rests.

Two points have a potential difference of 10V. After connecting a conductor with zero resistance between the points, the final potential at each point becomes 25V. What could be their initial potentials?

A convex mirror used as rear view mirror on an automobile has a radius of curvature of 3.00 m. If a bus is located at 5.00 m from this mirror, find the position, nature and size of the image.

Is evolution of heat also a product?

How does recombination of spectrum colours occur?

Define Hawking Radiation.

Answer figure

In the given circuit, calculate voltmeter reading across the parallel combination.

Sunlight is of Yellow or white colour? If it is yellow in colour than how sunlight can make seven colours? If it is White in colour than why do we see it in Yellow colour?

A concave mirror produces a magnification of + 4. The object is placed : (a) at the focus (b) between focus and centre of curvature (c) between focus and pole (d) beyond the centre of curvature

Vitamin D in plants are produced by which ray of Electromagnetic Spectrum?

What are the disadvantages of using solar cell(solar power)?

Which of these constituents present in air leads to the formation of fog and mist?

Why does the connecting cord of an electric heater not glow hot while the heating element does?

What is scattering of light ?

The back face of a circular loop of wire is found to be south magnetic pole. The direction of current in this face of the circular loop of wire will be : (a) towards south (b) clock wise (c) anticlockwise (d) towards north

A positively-charged particle (alpha-particle) projected towards the west is deflected towards the north by a magnetic field. The direction of magnetic field is

Two waves of the same pitch have amplitudes in the ratio 1:3. What will be the ratio of their (i) loudness, and (ii) frequencies ?

Consider the following statements. A. In India, cropland occupies 57% of total area. B. Pastures account for 56% area in Australia C. About 23rd area in Japan is under forests. What should be understood from the above statements?

Sir what must we to do if the ask write down the beta decay process of an nuclei..... We must write beta positive or negative decay

Two satellites of masses m1 and m2(m1>m2) are revolving round the earth in circular orbits of radius r1 and r2(r1>r2) respectively. Which of the following statements is true regarding their speeds v1 and v2?

If a force of 5 N gives a mass m1, an acceleration of 6 ms−2 and a mass m2, an acceleration of 24 ms−2. What acceleration would it give if both the masses are tied together?