16569 + Interview Questions in Physics

1.	Consider the following statements: Statement 1: 1 AU = 15.8 millions of a light year Statement 2: 1 light year = 6.32 × 104 AU
Answer» Consider the following statements: Statement 1: 1 AU = 15.8 millions of a light year Statement 2: 1 light year = 6.32 $\times$ $10^{4}$ AU

1.

Consider the following statements: Statement 1: 1 AU = 15.8 millions of a light year Statement 2: 1 light year = 6.32 × 104 AU

Answer»

Consider the following statements:

Statement 1: 1 AU = 15.8 millions of a light year

Statement 2: 1 light year = 6.32 $\times$ $10^{4}$ AU

2.	What is short circuit explain ?? How can we avoid it
Answer» What is short circuit explain ?? How can we avoid it

Discussion

3.	If the refractive index of a dense flint glass is 1.65 and of alcohol is 1.36 with respect to air, then the refractive index of the dense flint glass with respect to alcohol is
Answer» If the refractive index of a dense flint glass is $1.65$ and of alcohol is $1.36$ with respect to air, then the refractive index of the dense flint glass with respect to alcohol is

Discussion

4.	ntThe magnetic flux through a stationary loop with resistance R varies during interval of time T as phi=at (T-t). The heat generated during this time neglecting the inductance of loop will ben ntn
Answer» ntThe magnetic flux through a stationary loop with resistance R varies during interval of time T as phi=at (T-t). The heat generated during this time neglecting the inductance of loop will ben ntn

Discussion

5.	Give two differences between an ohmic and non-ohmic resistor.
Answer» Give two differences between an ohmic and non-ohmic resistor.

Discussion

6.	difference between electricity and current?
Answer» difference between electricity and current?

Discussion

7.	If AB is the wavefront of light in medium 1 having refractive index μ1 and CD be the wavefront in medium 2 having refractive index μ2. Choose the correct option.
Answer» If $A B$ is the wavefront of light in medium $1$ having refractive index $μ_{1}$ and $C D$ be the wavefront in medium $2$ having refractive index $μ_{2}$ . Choose the correct option.

Discussion

8.	A girl sees through a circular glass slab(refractive index 1.50 of thickness 20 mm and diameter 60 cm to the bottom of a swimming pol. Refractive index of water is 1.33. The bottom surface of the slab is in contact with the water surface.The depth of swimming pool is 6m. The area of bottom of swimming pool that can be seen through the slab is approximately.
Answer» A girl sees through a circular glass slab(refractive index 1.50 of thickness 20 mm and diameter 60 cm to the bottom of a swimming pol. Refractive index of water is 1.33. The bottom surface of the slab is in contact with the water surface. The depth of swimming pool is 6m. The area of bottom of swimming pool that can be seen through the slab is approximately.

8.

A girl sees through a circular glass slab(refractive index 1.50 of thickness 20 mm and diameter 60 cm to the bottom of a swimming pol. Refractive index of water is 1.33. The bottom surface of the slab is in contact with the water surface.The depth of swimming pool is 6m. The area of bottom of swimming pool that can be seen through the slab is approximately.

Answer»

A girl sees through a circular glass slab(refractive index 1.50 of thickness 20 mm and diameter 60 cm to the bottom of a swimming pol. Refractive index of water is 1.33. The bottom surface of the slab is in contact with the water surface.

The depth of swimming pool is 6m. The area of bottom of swimming pool that can be seen through the slab is approximately.

Discussion

9.	204 The power of a plano-convex lens whose refractive index is 1.5 and radius of curved surface being 15cm would be
Answer» 204 The power of a plano-convex lens whose refractive index is 1.5 and radius of curved surface being 15cm would be

Discussion

10.	A planet in a distant solar system is 10 times more massive than the earth and its radius is 10 times smaller. Given that the escape velocity from the earth is 11kms−1, the escape velocity (in km s−1) from the surface of the planet would be
Answer» A planet in a distant solar system is $10$ times more massive than the earth and its radius is $10$ times smaller. Given that the escape velocity from the earth is $11 {kms}^{- 1}$ , the escape velocity (in ${km s}^{- 1})$ from the surface of the planet would be

Discussion

11.	Describe the layers of the forest in detail.
Answer» Describe the layers of the forest in detail.

Discussion

12.	What is the speed of electron
Answer» What is the speed of electron

Discussion

13.	How does the radioactivity of an element get affected when it is oxidized?
Answer» How does the radioactivity of an element get affected when it is oxidized?

Discussion

14.	A ring with radius 4 m is hinged at point P. Two forces F1 and F2, each of magnitude 10 N acts on the Ring. Find the ratio of the torques produced by two forces F1 to F2 is
Answer» A ring with radius $4 m$ is hinged at point P. Two forces $F_{1}$ and $F_{2}$ , each of magnitude $10 N$ acts on the Ring. Find the ratio of the torques produced by two forces $F_{1}$ to $F_{2}$ is

14.

A ring with radius 4 m is hinged at point P. Two forces F1 and F2, each of magnitude 10 N acts on the Ring. Find the ratio of the torques produced by two forces F1 to F2 is

Answer»

A ring with radius $4 m$ is hinged at point P. Two forces $F_{1}$ and $F_{2}$ , each of magnitude $10 N$ acts on the Ring. Find the ratio of the torques produced by two forces $F_{1}$ to $F_{2}$ is

Discussion

15.	Speed of light in S.I. system is 3×108 m/s.In a new system,unit of length is a km and unit of time is b second.Then speed of light in new system of unit is
Answer» Speed of light in S.I. system is $3 \times 10^{8}$ m/s.In a new system,unit of length is a km and unit of time is b second.Then speed of light in new system of unit is

Discussion

16.	You are given the magnetic field pattern of a magnet. How will be find out from it where the magnetic field is the strongest ?
Answer» You are given the magnetic field pattern of a magnet. How will be find out from it where the magnetic field is the strongest ?

Discussion

17.	is work done by centripetal force always zero?
Answer» is work done by centripetal force always zero?

Discussion

18.	what are the uses of infrasonic sound?
Answer» what are the uses of infrasonic sound?

Discussion

19.	1 N m torque is___
Answer» 1 N m torque is___

Discussion

20.	Question 4For a current in a long straight solenoid N- and S-poles are created at the two ends. Among the following statements, the incorrect statement is(a) The field lines inside the solenoid are in the form of straight lines which indicates that the magnetic field is the same at all points inside the solenoid(b) The strong magnetic field produced inside the solenoid can be used to magnetise a piece of magnetic material like soft iron, when placed inside the coil(c) The pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet(d) The N- and S-poles exchange position when the direction of current through the solenoid is reversed
Answer» Question 4 For a current in a long straight solenoid N- and S-poles are created at the two ends. Among the following statements, the incorrect statement is (a) The field lines inside the solenoid are in the form of straight lines which indicates that the magnetic field is the same at all points inside the solenoid (b) The strong magnetic field produced inside the solenoid can be used to magnetise a piece of magnetic material like soft iron, when placed inside the coil (c) The pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet (d) The N- and S-poles exchange position when the direction of current through the solenoid is reversed

Discussion

21.	two thin lens of focii having powers P1 and P2 respectively are in contact and co axial Power of combination is
Answer» two thin lens of focii having powers P1 and P2 respectively are in contact and co axial Power of combination is

Discussion

22.	how to find relative velocity in motion in one dimension
Answer» how to find relative velocity in motion in one dimension

Discussion

23.	A lens forms an image of an object which is placed at a distance 15 cm in front of it. if the image forms at a distance 60 cm on the same side Find : (i) the focal length, (ii) the magnification, and (iii) the nature of image.
Answer» A lens forms an image of an object which is placed at a distance 15 cm in front of it. if the image forms at a distance 60 cm on the same side Find : (i) the focal length, (ii) the magnification, and (iii) the nature of image.

Discussion

24.	Why are compact fluorescent lamps (CFLs) preferred over incandescent electric bulbs?
Answer» Why are compact fluorescent lamps (CFLs) preferred over incandescent electric bulbs?

Discussion

25.	The fundamental note produced by a closed organ pipe is of frequency f The fundamental note produced by an open organ pipe of same length will be of frequency
Answer» The fundamental note produced by a closed organ pipe is of frequency f The fundamental note produced by an open organ pipe of same length will be of frequency

25.

The fundamental note produced by a closed organ pipe is of frequency f The fundamental note produced by an open organ pipe of same length will be of frequency

Answer»

The fundamental note produced by a closed organ pipe is of frequency f

The fundamental note produced by an open organ pipe of same length will

be of frequency

Discussion

26.	An irregular crystal structure reflects all the light that falls on it as shown in the diagram. Which of the following statement is true?
Answer» An irregular crystal structure reflects all the light that falls on it as shown in the diagram. Which of the following statement is true?

26.

An irregular crystal structure reflects all the light that falls on it as shown in the diagram. Which of the following statement is true?

Answer»

An irregular crystal structure reflects all the light that falls on it as shown in the diagram.

Which of the following statement is true?

Discussion

27.	A plane mirror reflects a pencil of light to form a real image. What is the incident of the pencil of light on the mirror?
Answer» A plane mirror reflects a pencil of light to form a real image. What is the incident of the pencil of light on the mirror?

Discussion

28.	depicts the mathematical form of Ohm’s Law.
Answer» depicts the mathematical form of Ohm’s Law.

Discussion

29.	The higher concentration of which gas in air can cause stiffness of flower buds ?
Answer» The higher concentration of which gas in air can cause stiffness of flower buds ?

Discussion

30.	What is d2sp3 hybridization?
Answer» What is d2sp3 hybridization?

Discussion

31.	Question 26 Comment on the following statements: (a) Evaporation produces cooling. (b) Rate of evaporation of an aqueous solution decreases with increase in humidity. (c) Sponge though compressible is a solid.
Answer» Question 26 Comment on the following statements: (a) Evaporation produces cooling. (b) Rate of evaporation of an aqueous solution decreases with increase in humidity. (c) Sponge though compressible is a solid.

Discussion

32.	Calculate the force of gravitation between the earth and the Sun, given that the mass of the earth =6×1024 kg and of the Sun =2×1030 kg. The average distance between the two is 1.5×1011 m. (Gravitational Constant G=6.67×10−11Nm2kg−2)
Answer» Calculate the force of gravitation between the earth and the Sun, given that the mass of the earth $= 6 \times 10^{24}$ kg and of the Sun $= 2 \times 10^{30}$ kg. The average distance between the two is $1.5 \times 10^{11} m$ . (Gravitational Constant $G = 6.67 \times 10^{- 11} N m^{2} k g^{- 2}$ )

Discussion

33.	Two resistors, with resistance 10 Ohm and 15 Ohm are connected to a battery of emf (voltage) 12 volt so as to obtain (a) minimum current (b) maximum current (i) Describe the mode of connecting the resistance in each case. (ii) Calcualte the strength of total current in the circuit in each case (ii) Also find total resistance
Answer» Two resistors, with resistance 10 Ohm and 15 Ohm are connected to a battery of emf (voltage) 12 volt so as to obtain (a) minimum current (b) maximum current (i) Describe the mode of connecting the resistance in each case. (ii) Calcualte the strength of total current in the circuit in each case (ii) Also find total resistance

Discussion

34.	Question 22Why do we see a rainbow in the sky only after rainfall?
Answer» Question 22 Why do we see a rainbow in the sky only after rainfall?

Discussion

35.	Light that is visible to humans occupies what part of the electromagnetic spectrum?
Answer» Light that is visible to humans occupies what part of the electromagnetic spectrum?

Discussion

36.	(a) Draw a circuit diagram to show how a soft iron piece can be transformed into an electromagnet. (b) Describe how an electromagnet could be used to separate copper from iron in a scrap yard.
Answer» (a) Draw a circuit diagram to show how a soft iron piece can be transformed into an electromagnet. (b) Describe how an electromagnet could be used to separate copper from iron in a scrap yard.

36.

(a) Draw a circuit diagram to show how a soft iron piece can be transformed into an electromagnet. (b) Describe how an electromagnet could be used to separate copper from iron in a scrap yard.

Answer»

(a) Draw a circuit diagram to show how a soft iron piece can be transformed into an electromagnet.

(b) Describe how an electromagnet could be used to separate copper from iron in a scrap yard.

Discussion

37.	In a lens displacement method, the distance between the object and screen is 70 cm, and the focal length of the lens is 16 cm. Find the separation between the sharp image positions of the lens.
Answer» In a lens displacement method, the distance between the object and screen is $70 cm$ , and the focal length of the lens is $16 cm$ . Find the separation between the sharp image positions of the lens.

Discussion

38.	Equivalent resistance between (a) & (b) in the circuit can be obtained by:
Answer» Equivalent resistance between (a) & (b) in the circuit can be obtained by:

Discussion

39.	What colour is the young woman’s hair? What does she say she can change it to? Why would she want to do so?
Answer» What colour is the young woman’s hair? What does she say she can change it to? Why would she want to do so?

Discussion

40.	the battery creates force to move electron called emf ,and force contains by each electron is voltage and the differernce in voltage is the potential difference. Am I right ?
Answer» the battery creates force to move electron called emf ,and force contains by each electron is voltage and the differernce in voltage is the potential difference. Am I right ?

Discussion

41.	Two lenses of focal lengths +10 cm and +15 cm are put in contact to form an achromatic combination the ratio of their dispersive power is
Answer» Two lenses of focal lengths $+ 10 cm$ and $+ 15 cm$ are put in contact to form an achromatic combination the ratio of their dispersive power is

Discussion

42.	A rough wedge of mass M is free to move on a smooh horizontal plane. The uniform cylinder of mass m is placed on the wedge and it begins to roll down without slipping.Find the acceleration of cylinder on the surface of wedge (without the help of pseudo force).
Answer» A rough wedge of mass M is free to move on a smooh horizontal plane. The uniform cylinder of mass m is placed on the wedge and it begins to roll down without slipping.Find the acceleration of cylinder on the surface of wedge (without the help of pseudo force).

Discussion

43.	The phase shift of lower and upper bounds of the first order system is given by
Answer» The phase shift of lower and upper bounds of the first order system is given by

Discussion

44.	132.Two thick wires and two thin wires all of same material.and same length form a square in three different ways P,Q and R as shown in the figure. With correct connections shown, the magnetic field due to the current flow, at the centre of the loop will be zero in case of:
Answer» 132.Two thick wires and two thin wires all of same material.and same length form a square in three different ways P,Q and R as shown in the figure. With correct connections shown, the magnetic field due to the current flow, at the centre of the loop will be zero in case of:

Discussion

45.	(a) In a d.c. motor, why must the current to the coil be reversed twice during each rotation? (b) What device reverses the current?
Answer» (a) In a d.c. motor, why must the current to the coil be reversed twice during each rotation? (b) What device reverses the current?

45.

(a) In a d.c. motor, why must the current to the coil be reversed twice during each rotation? (b) What device reverses the current?

Answer»

(a) In a d.c. motor, why must the current to the coil be reversed twice during each rotation?

(b) What device reverses the current?

Discussion

46.	How does a wind mill generate electric energy ?
Answer» How does a wind mill generate electric energy ?

Discussion

47.	When a cracker explodes into two equal parts, in which of the following ways will these parts move?
Answer» When a cracker explodes into two equal parts, in which of the following ways will these parts move?

Discussion

48.	Ionisation potential of H atom is 13.6 ever . If H atom in its ground state is excited by monochromatic light of energy 12.1 ever , then the number of spectral lines emitted according to Bohr' s theory will be ?
Answer» Ionisation potential of H atom is 13.6 ever . If H atom in its ground state is excited by monochromatic light of energy 12.1 ever , then the number of spectral lines emitted according to Bohr' s theory will be ?

Discussion

49.	In which of the following cases does the fuse operate to break the circuit?
Answer» In which of the following cases does the fuse operate to break the circuit?

Discussion

50.	Explain synthetic exchange method
Answer» Explain synthetic exchange method

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Consider the following statements: Statement 1: 1 AU = 15.8 millions of a light year Statement 2: 1 light year = 6.32 × 104 AU

What is short circuit explain ?? How can we avoid it

If the refractive index of a dense flint glass is 1.65 and of alcohol is 1.36 with respect to air, then the refractive index of the dense flint glass with respect to alcohol is

ntThe magnetic flux through a stationary loop with resistance R varies during interval of time T as phi=at (T-t). The heat generated during this time neglecting the inductance of loop will ben ntn

Give two differences between an ohmic and non-ohmic resistor.

difference between electricity and current?

If AB is the wavefront of light in medium 1 having refractive index μ1 and CD be the wavefront in medium 2 having refractive index μ2. Choose the correct option.

204 The power of a plano-convex lens whose refractive index is 1.5 and radius of curved surface being 15cm would be

A planet in a distant solar system is 10 times more massive than the earth and its radius is 10 times smaller. Given that the escape velocity from the earth is 11kms−1, the escape velocity (in km s−1) from the surface of the planet would be

Describe the layers of the forest in detail.

What is the speed of electron

How does the radioactivity of an element get affected when it is oxidized?

A ring with radius 4 m is hinged at point P. Two forces F1 and F2, each of magnitude 10 N acts on the Ring. Find the ratio of the torques produced by two forces F1 to F2 is

Speed of light in S.I. system is 3×108 m/s.In a new system,unit of length is a km and unit of time is b second.Then speed of light in new system of unit is

You are given the magnetic field pattern of a magnet. How will be find out from it where the magnetic field is the strongest ?

is work done by centripetal force always zero?

what are the uses of infrasonic sound?

1 N m torque is___

two thin lens of focii having powers P1 and P2 respectively are in contact and co axial Power of combination is

how to find relative velocity in motion in one dimension

A lens forms an image of an object which is placed at a distance 15 cm in front of it. if the image forms at a distance 60 cm on the same side Find : (i) the focal length, (ii) the magnification, and (iii) the nature of image.

Why are compact fluorescent lamps (CFLs) preferred over incandescent electric bulbs?

The fundamental note produced by a closed organ pipe is of frequency f The fundamental note produced by an open organ pipe of same length will be of frequency

An irregular crystal structure reflects all the light that falls on it as shown in the diagram. Which of the following statement is true?

A plane mirror reflects a pencil of light to form a real image. What is the incident of the pencil of light on the mirror?

depicts the mathematical form of Ohm’s Law.

The higher concentration of which gas in air can cause stiffness of flower buds ?

What is d2sp3 hybridization?

Question 26 Comment on the following statements: (a) Evaporation produces cooling. (b) Rate of evaporation of an aqueous solution decreases with increase in humidity. (c) Sponge though compressible is a solid.

Calculate the force of gravitation between the earth and the Sun, given that the mass of the earth =6×1024 kg and of the Sun =2×1030 kg. The average distance between the two is 1.5×1011 m. (Gravitational Constant G=6.67×10−11Nm2kg−2)

Question 22Why do we see a rainbow in the sky only after rainfall?

Light that is visible to humans occupies what part of the electromagnetic spectrum?

(a) Draw a circuit diagram to show how a soft iron piece can be transformed into an electromagnet. (b) Describe how an electromagnet could be used to separate copper from iron in a scrap yard.

In a lens displacement method, the distance between the object and screen is 70 cm, and the focal length of the lens is 16 cm. Find the separation between the sharp image positions of the lens.

Equivalent resistance between (a) &amp; (b) in the circuit can be obtained by:

What colour is the young woman’s hair? What does she say she can change it to? Why would she want to do so?

the battery creates force to move electron called emf ,and force contains by each electron is voltage and the differernce in voltage is the potential difference. Am I right ?

Two lenses of focal lengths +10 cm and +15 cm are put in contact to form an achromatic combination the ratio of their dispersive power is

A rough wedge of mass M is free to move on a smooh horizontal plane. The uniform cylinder of mass m is placed on the wedge and it begins to roll down without slipping.Find the acceleration of cylinder on the surface of wedge (without the help of pseudo force).

The phase shift of lower and upper bounds of the first order system is given by

132.Two thick wires and two thin wires all of same material.and same length form a square in three different ways P,Q and R as shown in the figure. With correct connections shown, the magnetic field due to the current flow, at the centre of the loop will be zero in case of:

(a) In a d.c. motor, why must the current to the coil be reversed twice during each rotation? (b) What device reverses the current?

How does a wind mill generate electric energy ?

When a cracker explodes into two equal parts, in which of the following ways will these parts move?

Ionisation potential of H atom is 13.6 ever . If H atom in its ground state is excited by monochromatic light of energy 12.1 ever , then the number of spectral lines emitted according to Bohr' s theory will be ?

In which of the following cases does the fuse operate to break the circuit?

Explain synthetic exchange method

Equivalent resistance between (a) & (b) in the circuit can be obtained by: