16569 + Interview Questions in Physics

1.	How is the magnetic field generated in Magnetic Resonance Imaging (MRI)?
Answer» How is the magnetic field generated in Magnetic Resonance Imaging (MRI)?

Discussion

2.	How is wind energy used in wind mills?
Answer» How is wind energy used in wind mills?

Discussion

3.	Question 2The human eye forms the image of an object at its(a) cornea(b) iris(c) pupil(d) retina
Answer» Question 2 The human eye forms the image of an object at its (a) cornea (b) iris (c) pupil (d) retina

Discussion

4.	The required Velocity Ratio (V.R) for a machine whose effort distance is 3 times that of load distance is ___ .
Answer» The required Velocity Ratio (V.R) for a machine whose effort distance is 3 times that of load distance is ___ .

Discussion

5.	The process of collection and storage of rainwater for reuse on-site, rather than allowing it to run off is known as ___.
Answer» The process of collection and storage of rainwater for reuse on-site, rather than allowing it to run off is known as ___.

Discussion

6.	(a) Name and state the law which relates the potential difference and current in a conductor, (b) What is the necessary condition for a conductor to obey the law named above in part(a)?
Answer» (a) Name and state the law which relates the potential difference and current in a conductor, (b) What is the necessary condition for a conductor to obey the law named above in part(a)?

Discussion

7.	What is meant by momentum??explain by practical mode
Answer» What is meant by momentum??explain by practical mode

Discussion

8.	reactive series
Answer» reactive series

Discussion

9.	Question 31 (a) Locate and name the water reservoirs in figures given below. (b) Which has an advantage over the other and why?
Answer» Question 31 (a) Locate and name the water reservoirs in figures given below. (b) Which has an advantage over the other and why?

Discussion

10.	How can you increase the turning effect of a force?
Answer» How can you increase the turning effect of a force?

Discussion

11.	Thickness of paper is measured in ___.
Answer» Thickness of paper is measured in ___.

Discussion

12.	If a motor pumps 10kilogram water in 1minut from the depth of 600metre. If the process goes on for 1 hour .Find the work done by the engine and also find the height of a ball of 250gram if it would be projected by the same amount of energy.
Answer» If a motor pumps 10kilogram water in 1minut from the depth of 600metre. If the process goes on for 1 hour .Find the work done by the engine and also find the height of a ball of 250gram if it would be projected by the same amount of energy.

Discussion

13.	If a metallic wire of resistance R is melted and recast to half of its length, the new resistance of the wire will be?
Answer» If a metallic wire of resistance R is melted and recast to half of its length, the new resistance of the wire will be?

Discussion

14.	Radius of a normal human eye ball is?
Answer» Radius of a normal human eye ball is?

Discussion

15.	31. If an electrolyte AB_2 has molar conductivity = 25 and molar conductivity at limiting dilution =100 then what will be its van't Hoff factor?
Answer» 31. If an electrolyte AB_2 has molar conductivity = 25 and molar conductivity at limiting dilution =100 then what will be its van't Hoff factor?

Discussion

16.	Which of these does not require any fuel to generate electricity?
Answer» Which of these does not require any fuel to generate electricity?

Discussion

17.	A ray of light, which is parallel to the principal axis of the concave mirror, after reflection passes through the
Answer» A ray of light, which is parallel to the principal axis of the concave mirror, after reflection passes through the

Discussion

18.	pins suspended from the same magnet to their maximum limit in two different cases(pin a are more than pin b). State with a reason whether the set of pins A or the set of pins B are made out of soft iron. Also define the magnetic process which enables us to suspend the pins one below the other.
Answer» pins suspended from the same magnet to their maximum limit in two different cases(pin a are more than pin b). State with a reason whether the set of pins A or the set of pins B are made out of soft iron. Also define the magnetic process which enables us to suspend the pins one below the other.

Discussion

19.	How is a polio vaccine given?
Answer» How is a polio vaccine given?

Discussion

20.	19. what is the difference between SN1 and SN2 mechanism ?
Answer» 19. what is the difference between SN1 and SN2 mechanism ?

Discussion

21.	Why electronic energy is negative?
Answer» Why electronic energy is negative?

Discussion

22.	32.A concave mirror of radius R is kept on a horizontal table. Water(refractive I=u) is poured into it up to a height h. Where should an object be placed so that it's image is formed on itself?
Answer» 32.A concave mirror of radius R is kept on a horizontal table. Water(refractive I=u) is poured into it up to a height h. Where should an object be placed so that it's image is formed on itself?

Discussion

23.	Current through wire XY of circuit shown is
Answer» Current through wire $XY$ of circuit shown is

Discussion

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

Discussion

25.	43. Force of interaction between two Co axial short dipole whose centers are R distance apart varies as
Answer» 43. Force of interaction between two Co axial short dipole whose centers are R distance apart varies as

Discussion

26.	In a compound microscope, focal length of objective and eyepiece are 2 cm and 5 cm respectively. An object is placed at a distance 2.2 cm from objective. If final image is formed at least distance of distinct vision (25 cm), then magnifying power of microscope and approximate distance between objective and eyepiece will be respectively
Answer» In a compound microscope, focal length of objective and eyepiece are 2 cm and 5 cm respectively. An object is placed at a distance 2.2 cm from objective. If final image is formed at least distance of distinct vision (25 cm), then magnifying power of microscope and approximate distance between objective and eyepiece will be respectively

Discussion

27.	The pressure of hydrogen required to make the potential of hydrogen electrode zero in pure water at 298 kelvin is
Answer» The pressure of hydrogen required to make the potential of hydrogen electrode zero in pure water at 298 kelvin is

Discussion

28.	is equilibrium constant and Kc same
Answer» is equilibrium constant and Kc same

Discussion

29.	Why is frequency of cyclotron f and not 2f even if charged particle is taking half revolution in dee??
Answer» Why is frequency of cyclotron f and not 2f even if charged particle is taking half revolution in dee??

Discussion

30.	Six equal resistance of 1 Ω each are connceted to form the sides of a hexagon ABCDEF. Calculate the resistance offered by the combination if the current enters at A and leaves at D.
Answer» Six equal resistance of $1 Ω$ each are connceted to form the sides of a hexagon ABCDEF. Calculate the resistance offered by the combination if the current enters at A and leaves at D.

Discussion

31.	39.s it correct that solonied has greater magnetic field at the Centre. Explain how
Answer» 39.s it correct that solonied has greater magnetic field at the Centre. Explain how

Discussion

32.	Why image is formed at focus when object is placed at infinity?
Answer» Why image is formed at focus when object is placed at infinity?

Discussion

33.	4 In HS- ,I- ,RNH2 ,NH3 ,order of proton accepting tendency will be?
Answer» 4 In HS- ,I- ,RNH2 ,NH3 ,order of proton accepting tendency will be?

Discussion

34.	9.The time period of artificial satellite in a circular orbit of radius R in 2days and its orbital velocity is Vo. If time period of another satellite in circular orbit is 16days then. What is the radius and orbital velocity?
Answer» 9.The time period of artificial satellite in a circular orbit of radius R in 2days and its orbital velocity is Vo. If time period of another satellite in circular orbit is 16days then. What is the radius and orbital velocity?

Discussion

35.	in how much time 6000 coulomb of electric charge will flow, if an electric current of 10 A is drawn through an electric motor?
Answer» in how much time 6000 coulomb of electric charge will flow, if an electric current of 10 A is drawn through an electric motor?

Discussion

36.	Two identical wires are stretched and produce 6 beats when sounded together.On changing the tension slightly in one of them ,the beat frequency remains unchanged. Denoting by T_1 and T_2 the higher and the lower initial tension in the two wires,then it can be said that 1. T_2 was decreased 2. T_2 was increased 3. T_1 was increased 4.none of these
Answer» Two identical wires are stretched and produce 6 beats when sounded together.On changing the tension slightly in one of them ,the beat frequency remains unchanged. Denoting by T_1 and T_2 the higher and the lower initial tension in the two wires,then it can be said that 1. T_2 was decreased 2. T_2 was increased 3. T_1 was increased 4.none of these

Discussion

37.	A conductor has an area of cross section S. If the electron charge is 'e' and the drift velocity of 'm' number of free electrons is 'vD',then the ratio of vD to the current i flowing through the conductor is given by:
Answer» A conductor has an area of cross section $S$ . If the electron charge is ' $e$ ' and the drift velocity of ' $m$ ' number of free electrons is ' $v_{D}$ ',then the ratio of $v_{D}$ to the current $i$ flowing through the conductor is given by:

Discussion

38.	How much energy is absorbed by 10kg molecule of an ideal gas if it expands from an initial pressure of 8 atm to 4 atm at a constant temperature of 27°C
Answer» How much energy is absorbed by 10kg molecule of an ideal gas if it expands from an initial pressure of 8 atm to 4 atm at a constant temperature of 27°C

Discussion

39.	What do you understand by the term drift velocity of electrons. How is this diffferent from the velocity of current in a conductor?
Answer» What do you understand by the term drift velocity of electrons. How is this diffferent from the velocity of current in a conductor?

Discussion

40.	59. A point source of monochromatic light is placed at a depth 'h' below the surface of water of refractive index 'mu'. The power of the source is P. Calculate the light energy coming out of the water surface per unit time.
Answer» 59. A point source of monochromatic light is placed at a depth 'h' below the surface of water of refractive index 'mu'. The power of the source is P. Calculate the light energy coming out of the water surface per unit time.

Discussion

41.	115.A square coil of edge L having n turns carries a current i. it is kept on a smooth horizontal plate a uniform magnetic field B exists in a direction parallel to an edge the total mass of the coil is M what should be the minimum value of B for which the coil will start tipping over?
Answer» 115.A square coil of edge L having n turns carries a current i. it is kept on a smooth horizontal plate a uniform magnetic field B exists in a direction parallel to an edge the total mass of the coil is M what should be the minimum value of B for which the coil will start tipping over?

Discussion

42.	Using the words given above rewrite Part1 of the poem in your own words. The first stanza has been done as an example: It is an ancient Mariner, And he stoppeth one of three. ‘By thy long grey beard and glittering eye, Now wherefore stopp’st thou me? An old sailor stopped one of the three people passing by, who asked: “Old man, with your long grey beard and glittering eye, why are you stopping me?”
Answer» Using the words given above rewrite Part1 of the poem in your own words. The first stanza has been done as an example: It is an ancient Mariner, And he stoppeth one of three. ‘By thy long grey beard and glittering eye, Now wherefore stopp’st thou me? An old sailor stopped one of the three people passing by, who asked: “Old man, with your long grey beard and glittering eye, why are you stopping me?”

42.

Using the words given above rewrite Part1 of the poem in your own words. The first stanza has been done as an example: It is an ancient Mariner, And he stoppeth one of three. ‘By thy long grey beard and glittering eye, Now wherefore stopp’st thou me? An old sailor stopped one of the three people passing by, who asked: “Old man, with your long grey beard and glittering eye, why are you stopping me?”

Answer»

Using
the words given above rewrite Part1 of the poem in your own words.
The first stanza has been done as an example:

It
is an ancient Mariner,

And
he stoppeth one of three.

‘By
thy long grey beard and glittering eye,

Now
wherefore stopp’st thou me?

An
old sailor stopped one of the three people passing by, who asked:
“Old man, with your long grey beard and glittering eye, why are
you stopping me?”

Discussion

43.	The mechanical advantage (MA) of an ideal inclined plane is always
Answer» The mechanical advantage (MA) of an ideal inclined plane is always

Discussion

44.	A student found that when a resistor of resistance 3 Ω was joined with 3 V battery as per figure shown below, the current flowing through it was 1 A. He then joined another resistor of resistance 6 Ω in parallel with a resistor of resistance 3 Ω. The reading in the ammeter will now be: (a) 9 A (b) 1.5 A (c) 1 A (d) 6 A
Answer» A student found that when a resistor of resistance $3 Ω$ was joined with 3 V battery as per figure shown below, the current flowing through it was 1 A. He then joined another resistor of resistance $6 Ω$ in parallel with a resistor of resistance $3 Ω$ . The reading in the ammeter will now be: (a) 9 A (b) 1.5 A (c) 1 A (d) 6 A

Discussion

45.	Question 37 Define power of a lens. What is its unit? One student uses a lens of focal length 50 cm and another of –50 cm. What is the nature of the lens and its power used by each of them?
Answer» Question 37 Define power of a lens. What is its unit? One student uses a lens of focal length 50 cm and another of –50 cm. What is the nature of the lens and its power used by each of them?

Discussion

46.	Explain Hubble's law in details.
Answer» Explain Hubble's law in details.

Discussion

47.	An object is placed in front of a convex mirror at a distance of 60m from its pole. Object starts moving towards the mirror at 20 m/s. Find the average velocity of the image for a time interval of 2 sec if the focal length of the mirror is 20m.
Answer» An object is placed in front of a convex mirror at a distance of 60m from its pole. Object starts moving towards the mirror at 20 $m / s$ . Find the average velocity of the image for a time interval of 2 sec if the focal length of the mirror is 20m.

Discussion

48.	Current through the battery at the instant when the switch S is closed is (in A):
Answer» Current through the battery at the instant when the switch S is closed is (in A):

Discussion

49.	Question 3 Why does our palm feel cold when we put some acetone or petrol or perfume on it?
Answer» Question 3 Why does our palm feel cold when we put some acetone or petrol or perfume on it?

Discussion

50.	If a resistor of 25 Ω has a length of 3.2 cm and an area of cross section of 15 mm2, then its resistivity is:
Answer» If a resistor of $25 Ω$ has a length of $3.2 cm$ and an area of cross section of $15 {mm}^{2}$ , then its resistivity is:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

How is the magnetic field generated in Magnetic Resonance Imaging (MRI)?

How is wind energy used in wind mills?

Question 2The human eye forms the image of an object at its(a) cornea(b) iris(c) pupil(d) retina

The required Velocity Ratio (V.R) for a machine whose effort distance is 3 times that of load distance is ___ .

The process of collection and storage of rainwater for reuse on-site, rather than allowing it to run off is known as ___.

(a) Name and state the law which relates the potential difference and current in a conductor, (b) What is the necessary condition for a conductor to obey the law named above in part(a)?

What is meant by momentum??explain by practical mode

reactive series

Question 31 (a) Locate and name the water reservoirs in figures given below. (b) Which has an advantage over the other and why?

How can you increase the turning effect of a force?

Thickness of paper is measured in ___.

If a motor pumps 10kilogram water in 1minut from the depth of 600metre. If the process goes on for 1 hour .Find the work done by the engine and also find the height of a ball of 250gram if it would be projected by the same amount of energy.

If a metallic wire of resistance R is melted and recast to half of its length, the new resistance of the wire will be?

Radius of a normal human eye ball is?

31. If an electrolyte AB_2 has molar conductivity = 25 and molar conductivity at limiting dilution =100 then what will be its van't Hoff factor?

Which of these does not require any fuel to generate electricity?

A ray of light, which is parallel to the principal axis of the concave mirror, after reflection passes through the

pins suspended from the same magnet to their maximum limit in two different cases(pin a are more than pin b). State with a reason whether the set of pins A or the set of pins B are made out of soft iron. Also define the magnetic process which enables us to suspend the pins one below the other.

How is a polio vaccine given?

19. what is the difference between SN1 and SN2 mechanism ?

Why electronic energy is negative?

32.A concave mirror of radius R is kept on a horizontal table. Water(refractive I=u) is poured into it up to a height h. Where should an object be placed so that it's image is formed on itself?

Current through wire XY of circuit shown is

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

43. Force of interaction between two Co axial short dipole whose centers are R distance apart varies as

The pressure of hydrogen required to make the potential of hydrogen electrode zero in pure water at 298 kelvin is

is equilibrium constant and Kc same

Why is frequency of cyclotron f and not 2f even if charged particle is taking half revolution in dee??

Six equal resistance of 1 Ω each are connceted to form the sides of a hexagon ABCDEF. Calculate the resistance offered by the combination if the current enters at A and leaves at D.

39.s it correct that solonied has greater magnetic field at the Centre. Explain how

Why image is formed at focus when object is placed at infinity?

4 In HS- ,I- ,RNH2 ,NH3 ,order of proton accepting tendency will be?

9.The time period of artificial satellite in a circular orbit of radius R in 2days and its orbital velocity is Vo. If time period of another satellite in circular orbit is 16days then. What is the radius and orbital velocity?

in how much time 6000 coulomb of electric charge will flow, if an electric current of 10 A is drawn through an electric motor?

A conductor has an area of cross section S. If the electron charge is 'e' and the drift velocity of 'm' number of free electrons is 'vD',then the ratio of vD to the current i flowing through the conductor is given by:

How much energy is absorbed by 10kg molecule of an ideal gas if it expands from an initial pressure of 8 atm to 4 atm at a constant temperature of 27°C

What do you understand by the term drift velocity of electrons. How is this diffferent from the velocity of current in a conductor?

59. A point source of monochromatic light is placed at a depth 'h' below the surface of water of refractive index 'mu'. The power of the source is P. Calculate the light energy coming out of the water surface per unit time.

115.A square coil of edge L having n turns carries a current i. it is kept on a smooth horizontal plate a uniform magnetic field B exists in a direction parallel to an edge the total mass of the coil is M what should be the minimum value of B for which the coil will start tipping over?

The mechanical advantage (MA) of an ideal inclined plane is always

Question 37 Define power of a lens. What is its unit? One student uses a lens of focal length 50 cm and another of –50 cm. What is the nature of the lens and its power used by each of them?

Explain Hubble's law in details.

An object is placed in front of a convex mirror at a distance of 60m from its pole. Object starts moving towards the mirror at 20 m/s. Find the average velocity of the image for a time interval of 2 sec if the focal length of the mirror is 20m.

Current through the battery at the instant when the switch S is closed is (in A):

Question 3 Why does our palm feel cold when we put some acetone or petrol or perfume on it?

If a resistor of 25 Ω has a length of 3.2 cm and an area of cross section of 15 mm2, then its resistivity is: