16569 + Interview Questions in Physics

1.	How to verify ohm's law
Answer» How to verify ohm's law

Discussion

2.	How does the human eye perceive depth?
Answer» How does the human eye perceive depth?

Discussion

3.	two different electromagnetic radiations have wavelength 200nm and 400nm.The ratio of their energy will be
Answer» two different electromagnetic radiations have wavelength 200nm and 400nm.The ratio of their energy will be

Discussion

4.	Magnetic field lines ___
Answer» Magnetic field lines ___

Discussion

5.	if one surface of a double convex lens has been silvered then its effective focal length f is
Answer» if one surface of a double convex lens has been silvered then its effective focal length f is

Discussion

6.	Question 77 In 1975, the consumption of water for human use was about 3850 cu km/yr. It increased to about 6000 cu km/yr in the year 2000. Find the per cent increase in the consumption of water from 1975 to 2000. Also, find the annual per cent increase in consumption (assuming water consumption increases uniformly).
Answer» Question 77 In 1975, the consumption of water for human use was about 3850 cu km/yr. It increased to about 6000 cu km/yr in the year 2000. Find the per cent increase in the consumption of water from 1975 to 2000. Also, find the annual per cent increase in consumption (assuming water consumption increases uniformly).

6.

Question 77 In 1975, the consumption of water for human use was about 3850 cu km/yr. It increased to about 6000 cu km/yr in the year 2000. Find the per cent increase in the consumption of water from 1975 to 2000. Also, find the annual per cent increase in consumption (assuming water consumption increases uniformly).

Answer»

Question 77

In 1975, the consumption of water for human use was about 3850 cu km/yr. It increased to about 6000 cu km/yr in the year 2000. Find the per cent increase in the consumption of water from 1975 to 2000. Also, find the annual per cent increase in consumption (assuming water consumption increases uniformly).

Discussion

7.	For adsorption of gas on solid surface, the plots of log xm vs log P is linear with a slope equal to-
Answer» For adsorption of gas on solid surface, the plots of log $\frac{x}{m}$ vs log P is linear with a slope equal to-

Discussion

8.	Why do the electrons lost on the ionization of gases in Millikan's Oil Drop Experiment stick to the oil drop?
Answer» Why do the electrons lost on the ionization of gases in Millikan's Oil Drop Experiment stick to the oil drop?

Discussion

9.	An engine pumps 400 kg of water through height of 10 m in 40 s. Find the power of the engine if its efficiency is 80% (g = 10 ms–2) 2 kW 1 kW 1.25 kW 2.5 kW
Answer» An engine pumps 400 kg of water through height of 10 m in 40 s. Find the power of the engine if its efficiency is 80% (g = 10 ms–2) 2 kW 1 kW 1.25 kW 2.5 kW

Discussion

10.	Two coils of resis†an ce R1 = 3 ohms and R2 =6 ohms are connected in series to a battery of 12 volt .Find electrical energy consumed in 1 minute in each resis†an ce and Total energy supplied by battery in one minute.
Answer» Two coils of resis†an ce R1 = 3 ohms and R2 =6 ohms are connected in series to a battery of 12 volt .Find electrical energy consumed in 1 minute in each resis†an ce and Total energy supplied by battery in one minute.

Discussion

11.	Question 2 (a)What is the range of frequencies associated with(a) Infrasound?
Answer» Question 2 (a) What is the range of frequencies associated with (a) Infrasound?

Discussion

12.	1_Expression for magnetic field due to a long straight current carrying conductor ? 2_ expression for magnetic field due to a torodial solenoid ? 3_ explain cyclotron ? Its limitation and application?
Answer» 1_Expression for magnetic field due to a long straight current carrying conductor ? 2_ expression for magnetic field due to a torodial solenoid ? 3_ explain cyclotron ? Its limitation and application?

Discussion

13.	Presbyopia for human eye can be removed by using:
Answer» Presbyopia for human eye can be removed by using:

Discussion

14.	A solid sphere of uniform density and radius 4 units is located with its centre at the origin O. Two spheres of equal radii 1 unit, with their centres at A (- 2, 0, 0) and B (2, 0, 0) respectively are taken out of the solid left behind spherical cavities as shown in the figure. Then choose the correct statement.
Answer» A solid sphere of uniform density and radius 4 units is located with its centre at the origin O. Two spheres of equal radii 1 unit, with their centres at A (- 2, 0, 0) and B (2, 0, 0) respectively are taken out of the solid left behind spherical cavities as shown in the figure. Then choose the correct statement.

Discussion

15.	An electric current is flowing in a long straight wire. The magnetic field due to this current a distance of 5 cm from the wire is 10 T. The magnetic field at a distance of 10 cm from the wire is
Answer» An electric current is flowing in a long straight wire. The magnetic field due to this current a distance of 5 cm from the wire is 10 T. The magnetic field at a distance of 10 cm from the wire is

Discussion

16.	A straight segment of wire is moving with velocity i-2j+k and magnetic field in region is 4i+2j-k. Find emf induced in rod at an instant when points are located between (1, 1, 1) and (3, 3, 3)
Answer» A straight segment of wire is moving with velocity i-2j+k and magnetic field in region is 4i+2j-k. Find emf induced in rod at an instant when points are located between (1, 1, 1) and (3, 3, 3)

Discussion

17.	What is double staircase wiring?
Answer» What is double staircase wiring?

Discussion

18.	If the distance of an object from the first focus of an equiconvex lens is x, and the distance of its real image from second focus is 4x. If the focal length of the lens is nx, then find the value of n :
Answer» If the distance of an object from the first focus of an equiconvex lens is x, and the distance of its real image from second focus is 4x. If the focal length of the lens is nx, then find the value of n :

Discussion

19.	Draw a labelled diagram of a step-up transformer and explain how does it work. State two characteristics of the primary coil as compared to its secondary coil.
Answer» Draw a labelled diagram of a step-up transformer and explain how does it work. State two characteristics of the primary coil as compared to its secondary coil.

Discussion

20.	How many Structural customers of C6H14
Answer» How many Structural customers of C6H14

Discussion

21.	At what dis†an ce from a converging lens of focal length 12cm must an object be placed in order that an image of magnification 1 will be produced
Answer» At what dis†an ce from a converging lens of focal length 12cm must an object be placed in order that an image of magnification 1 will be produced

Discussion

22.	In the figure, calculate: (a) the total resistance of the circuit, (b) the value of R, and (c) the current flowing in R.
Answer» In the figure, calculate: (a) the total resistance of the circuit, (b) the value of R, and (c) the current flowing in R.

22.

In the figure, calculate: (a) the total resistance of the circuit, (b) the value of R, and (c) the current flowing in R.

Answer»

In the figure, calculate:

(a) the total resistance of the circuit,

(b) the value of R, and

(c) the current flowing in R.

Discussion

23.	Hen came first or egg?
Answer» Hen came first or egg?

Discussion

24.	(a) State the relation between potential difference, work done and charge moved. (b) Calculate the work done in moving a charge of 4 coulombs from a point at 220 volts to another point at 230 volts.
Answer» (a) State the relation between potential difference, work done and charge moved. (b) Calculate the work done in moving a charge of 4 coulombs from a point at 220 volts to another point at 230 volts.

Discussion

25.	What are the elements used in the manufacture of solar cells?
Answer» What are the elements used in the manufacture of solar cells?

Discussion

26.

Name Age Year of becoming an astronaut No. of space Journeys Experience with zero gravity Ways of staying fit Memorable moments What one has learnt from the travels Sunita Williams

Answer»

Name	Age	Year of becoming an astronaut	No. of space Journeys	Experience with zero gravity	Ways of staying fit	Memorable moments	What one has learnt from the travels
Sunita Williams

Discussion

27.	The aluminium strips in an electroscope is replaced by plastic strips and a charged body is brought in contact with the metal clip. What will happen?
Answer» The aluminium strips in an electroscope is replaced by plastic strips and a charged body is brought in contact with the metal clip. What will happen?

Discussion

28.	OA is an object with size 4 cm and O'A' is the image of the object. Find the image height and nature of the image formed.
Answer» OA is an object with size $4 c m$ and O'A' is the image of the object. Find the image height and nature of the image formed.

Discussion

29.	in the process of electrolysis of water, is the volume of oxygen gas collected at anode double the hydrogen gas collected at cathode?
Answer» in the process of electrolysis of water, is the volume of oxygen gas collected at anode double the hydrogen gas collected at cathode?

Discussion

30.	An aqueous solution of AgNO3 electrolysed by passing a current of 0.965 ampere for 1000 sec. Volume of gases obtained at STP/NTP will beA 22.4 L B 0.056 L C 0.112 L D 0.224 L
Answer» An aqueous solution of AgNO3 electrolysed by passing a current of 0.965 ampere for 1000 sec. Volume of gases obtained at STP/NTP will be A 22.4 L B 0.056 L C 0.112 L D 0.224 L

Discussion

31.	Explain the following terms : Pole, Centre of curvature, Radius of curvature, Principal axis. Show them on separate diagrams for each of the concave and convex mirrors.
Answer» Explain the following terms : Pole, Centre of curvature, Radius of curvature, Principal axis. Show them on separate diagrams for each of the concave and convex mirrors.

31.

Explain the following terms : Pole, Centre of curvature, Radius of curvature, Principal axis. Show them on separate diagrams for each of the concave and convex mirrors.

Answer»

Explain the following terms :

Pole, Centre of curvature, Radius of curvature, Principal axis.

Show them on separate diagrams for each of the concave and convex mirrors.

Discussion

32.	What is the usual current rating of the fuse wire in the line to feed (a) Lights and fans? (b) Appliances of 2kW or more power?
Answer» What is the usual current rating of the fuse wire in the line to feed (a) Lights and fans? (b) Appliances of 2kW or more power?

Discussion

33.	A student measures the terminal potential difference V of a cell of emf E & internal resistance r as a function of the current I flowing through it. The slope and intercept of the graph between V & I respectively equal to.? 1. E & -r 2. -r and E 3. r & -E
Answer» A student measures the terminal potential difference V of a cell of emf E & internal resistance r as a function of the current I flowing through it. The slope and intercept of the graph between V & I respectively equal to.? 1. E & -r 2. -r and E 3. r & -E

Discussion

34.	An open organ pipe resonates with a tuning fork of frequency 500 Hz. it is observed that two successive nodes are formed at dis†an ces 16 cm and 46 cm from the open end.The speed of sound ithe air is what?
Answer» An open organ pipe resonates with a tuning fork of frequency 500 Hz. it is observed that two successive nodes are formed at dis†an ces 16 cm and 46 cm from the open end.The speed of sound ithe air is what?

Discussion

35.	what is the relation between amount of bending and speed of light in a medium ? explain in simple words ,kindly and in detail also
Answer» what is the relation between amount of bending and speed of light in a medium ? explain in simple words ,kindly and in detail also

Discussion

36.	KW and kWh are
Answer» KW and kWh are

Discussion

37.	We need to conserve fossil fuels because:
Answer» We need to conserve fossil fuels because:

Discussion

38.	What is the effect of size of mirror on the nature of image?
Answer» What is the effect of size of mirror on the nature of image?

Discussion

39.	The temperature at which water boil depend on the pressure the water is under . At sea level the pressure is 100kPa,water boil at hundred degree Celsius the pressure in the pressure cooker is greater than 100kPa and boiling point of water is greater than hundred degree Celsius . on the mountain top at the altitude of 7700 m the climber found that his fuel store couldn't raise the temperature of boiling water above 75 degrees celsius best explanation explanation of this first the stop didn't have the sufficient oxygen 21 the few completely . second the also called it absorb the heat from the water . third the pressure was less than it was at sea level . Fourth the air fresher was better than it was at sea level
Answer» The temperature at which water boil depend on the pressure the water is under . At sea level the pressure is 100kPa,water boil at hundred degree Celsius the pressure in the pressure cooker is greater than 100kPa and boiling point of water is greater than hundred degree Celsius . on the mountain top at the altitude of 7700 m the climber found that his fuel store couldn't raise the temperature of boiling water above 75 degrees celsius best explanation explanation of this first the stop didn't have the sufficient oxygen 21 the few completely . second the also called it absorb the heat from the water . third the pressure was less than it was at sea level . Fourth the air fresher was better than it was at sea level

39.

The temperature at which water boil depend on the pressure the water is under . At sea level the pressure is 100kPa,water boil at hundred degree Celsius the pressure in the pressure cooker is greater than 100kPa and boiling point of water is greater than hundred degree Celsius . on the mountain top at the altitude of 7700 m the climber found that his fuel store couldn't raise the temperature of boiling water above 75 degrees celsius best explanation explanation of this first the stop didn't have the sufficient oxygen 21 the few completely . second the also called it absorb the heat from the water . third the pressure was less than it was at sea level . Fourth the air fresher was better than it was at sea level

Answer»

The temperature at which water boil depend on the pressure the water is under . At sea level the pressure is 100kPa,water boil at hundred degree Celsius the pressure in the pressure cooker is greater than 100kPa and boiling point of water is greater than hundred degree Celsius .

on the mountain top at the altitude of 7700 m the climber found that his fuel store couldn't raise the temperature of boiling water above 75 degrees celsius best explanation explanation of this

first the stop didn't have the sufficient oxygen 21 the few completely .

second the also called it absorb the heat from the water .

third the pressure was less than it was at sea level .

Fourth the air fresher was better than it was at sea level

Discussion

40.	Write the mirror formula. Give the meaning of each symbol which occurs in it.
Answer» Write the mirror formula. Give the meaning of each symbol which occurs in it.

Discussion

41.	51. A cell emf E having internal resistance r is connected to external resistance R. The potential drop V across resistor R varies with R as shown in figure by the curved marked as :- A)4 B)1 C)2 D)3
Answer» 51. A cell emf E having internal resistance r is connected to external resistance R. The potential drop V across resistor R varies with R as shown in figure by the curved marked as :- A)4 B)1 C)2 D)3

Discussion

42.	There is a stream of neutrons with a kinetic energy of 0.32 eV. If the half-life of neutrons is 700 seconds, what fraction (in 10–3) of neutrons will decay before they travel a distance of 8 km? Given, mass of a neutron =1.6×10–27 kg (Round off to nearest integer)
Answer» There is a stream of neutrons with a kinetic energy of $0.32 eV$ . If the half-life of neutrons is $700 seconds$ , what fraction (in $10^{- 3})$ of neutrons will decay before they travel a distance of $8 km$ ? Given, mass of a neutron $= 1.6 \times 10^{- 27} kg$ (Round off to nearest integer)

Discussion

43.	An element X which has 84 protons and 128 neutrons emits 4a particles and 2b-particles to become element Y. What is atomic number and mass number of Y?
Answer» An element X which has 84 protons and 128 neutrons emits 4a particles and 2b-particles to become element Y. What is atomic number and mass number of Y?

Discussion

44.	A positronium consists of an electron and a positron, revolving about their common centre of mass. Calculate the kinetic energy of the electron if the radius of circular path is equal to the radius of electron in ground state of a hydrogen atom.
Answer» A positronium consists of an electron and a positron, revolving about their common centre of mass. Calculate the kinetic energy of the electron if the radius of circular path is equal to the radius of electron in ground state of a hydrogen atom.

Discussion

45.	Discuss the role of high specific heat capacity of water with reference to climate in coastal areas.
Answer» Discuss the role of high specific heat capacity of water with reference to climate in coastal areas.

Discussion

46.	Frequencies of light incident on a system of scattering particles are in the ratio of 1:2. Then, the intensities of scattered light in a particular direction is in the ratio :
Answer» Frequencies of light incident on a system of scattering particles are in the ratio of $1 : 2$ . Then, the intensities of scattered light in a particular direction is in the ratio :

Discussion

47.	A steering wheel of diameter 0.5 m is rotated anticlockwise by applying two forces each of magnitude 5 N. Calculate the moment of couple applied.
Answer» A steering wheel of diameter 0.5 m is rotated anticlockwise by applying two forces each of magnitude 5 N. Calculate the moment of couple applied.

Discussion

48.	An object is placed at a distance of 30 cm from a concave lens of focal lenth 15 cm. List four charcteristics (nature, positions, etc.) of the image formed by the lens.
Answer» An object is placed at a distance of 30 cm from a concave lens of focal lenth 15 cm. List four charcteristics (nature, positions, etc.) of the image formed by the lens.

Discussion

49.	If 'i' is the critical angle, is the angle of its refracted ray.
Answer» If 'i' is the critical angle, is the angle of its refracted ray.

Discussion

50.	if 0.224L of H2 gas is formedat the cathode,the volume of O2 gas at anode under identical condition is
Answer» if 0.224L of H2 gas is formedat the cathode,the volume of O2 gas at anode under identical condition is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

How to verify ohm's law

How does the human eye perceive depth?

two different electromagnetic radiations have wavelength 200nm and 400nm.The ratio of their energy will be

Magnetic field lines ___

if one surface of a double convex lens has been silvered then its effective focal length f is

For adsorption of gas on solid surface, the plots of log xm vs log P is linear with a slope equal to-

Why do the electrons lost on the ionization of gases in Millikan's Oil Drop Experiment stick to the oil drop?

An engine pumps 400 kg of water through height of 10 m in 40 s. Find the power of the engine if its efficiency is 80% (g = 10 ms–2) 2 kW 1 kW 1.25 kW 2.5 kW

Two coils of resis†an ce R1 = 3 ohms and R2 =6 ohms are connected in series to a battery of 12 volt .Find electrical energy consumed in 1 minute in each resis†an ce and Total energy supplied by battery in one minute.

Question 2 (a)What is the range of frequencies associated with(a) Infrasound?

1_Expression for magnetic field due to a long straight current carrying conductor ? 2_ expression for magnetic field due to a torodial solenoid ? 3_ explain cyclotron ? Its limitation and application?

Presbyopia for human eye can be removed by using:

An electric current is flowing in a long straight wire. The magnetic field due to this current a distance of 5 cm from the wire is 10 T. The magnetic field at a distance of 10 cm from the wire is

A straight segment of wire is moving with velocity i-2j+k and magnetic field in region is 4i+2j-k. Find emf induced in rod at an instant when points are located between (1, 1, 1) and (3, 3, 3)

What is double staircase wiring?

If the distance of an object from the first focus of an equiconvex lens is x, and the distance of its real image from second focus is 4x. If the focal length of the lens is nx, then find the value of n :

Draw a labelled diagram of a step-up transformer and explain how does it work. State two characteristics of the primary coil as compared to its secondary coil.

How many Structural customers of C6H14

At what dis†an ce from a converging lens of focal length 12cm must an object be placed in order that an image of magnification 1 will be produced

In the figure, calculate: (a) the total resistance of the circuit, (b) the value of R, and (c) the current flowing in R.

Hen came first or egg?

(a) State the relation between potential difference, work done and charge moved. (b) Calculate the work done in moving a charge of 4 coulombs from a point at 220 volts to another point at 230 volts.

What are the elements used in the manufacture of solar cells?

Name Age Year of becoming an astronaut No. of space Journeys Experience with zero gravity Ways of staying fit Memorable moments What one has learnt from the travels Sunita Williams

The aluminium strips in an electroscope is replaced by plastic strips and a charged body is brought in contact with the metal clip. What will happen?

OA is an object with size 4 cm and O'A' is the image of the object. Find the image height and nature of the image formed.

in the process of electrolysis of water, is the volume of oxygen gas collected at anode double the hydrogen gas collected at cathode?

An aqueous solution of AgNO3 electrolysed by passing a current of 0.965 ampere for 1000 sec. Volume of gases obtained at STP/NTP will beA 22.4 L B 0.056 L C 0.112 L D 0.224 L

Explain the following terms : Pole, Centre of curvature, Radius of curvature, Principal axis. Show them on separate diagrams for each of the concave and convex mirrors.

What is the usual current rating of the fuse wire in the line to feed (a) Lights and fans? (b) Appliances of 2kW or more power?

A student measures the terminal potential difference V of a cell of emf E & internal resistance r as a function of the current I flowing through it. The slope and intercept of the graph between V & I respectively equal to.? 1. E & -r 2. -r and E 3. r & -E

An open organ pipe resonates with a tuning fork of frequency 500 Hz. it is observed that two successive nodes are formed at dis†an ces 16 cm and 46 cm from the open end.The speed of sound ithe air is what?

what is the relation between amount of bending and speed of light in a medium ? explain in simple words ,kindly and in detail also

KW and kWh are

We need to conserve fossil fuels because:

What is the effect of size of mirror on the nature of image?

Write the mirror formula. Give the meaning of each symbol which occurs in it.

51. A cell emf E having internal resistance r is connected to external resistance R. The potential drop V across resistor R varies with R as shown in figure by the curved marked as :- A)4 B)1 C)2 D)3

There is a stream of neutrons with a kinetic energy of 0.32 eV. If the half-life of neutrons is 700 seconds, what fraction (in 10–3) of neutrons will decay before they travel a distance of 8 km? Given, mass of a neutron =1.6×10–27 kg (Round off to nearest integer)

An element X which has 84 protons and 128 neutrons emits 4a particles and 2b-particles to become element Y. What is atomic number and mass number of Y?

A positronium consists of an electron and a positron, revolving about their common centre of mass. Calculate the kinetic energy of the electron if the radius of circular path is equal to the radius of electron in ground state of a hydrogen atom.

Discuss the role of high specific heat capacity of water with reference to climate in coastal areas.

Frequencies of light incident on a system of scattering particles are in the ratio of 1:2. Then, the intensities of scattered light in a particular direction is in the ratio :

A steering wheel of diameter 0.5 m is rotated anticlockwise by applying two forces each of magnitude 5 N. Calculate the moment of couple applied.

An object is placed at a distance of 30 cm from a concave lens of focal lenth 15 cm. List four charcteristics (nature, positions, etc.) of the image formed by the lens.

If 'i' is the critical angle, is the angle of its refracted ray.

if 0.224L of H2 gas is formedat the cathode,the volume of O2 gas at anode under identical condition is