16569 + Interview Questions in Physics

1.	An object is kept at 60 cm in front of a plane mirror. If the mirror is now moved 25 cm away from the object, how does the image shift from its previous position ?
Answer» An object is kept at 60 cm in front of a plane mirror. If the mirror is now moved 25 cm away from the object, how does the image shift from its previous position ?

Discussion

2.	What is the forest raw material for rubber? __
Answer» What is the forest raw material for rubber? __

Discussion

3.	A current I flows along the length of an infinitely long, straight, thin-walled pipe, then:
Answer» A current I flows along the length of an infinitely long, straight, thin-walled pipe, then:

Discussion

4.	What is the resistance between P & Q?
Answer» What is the resistance between P & Q?

Discussion

5.	The figure shows white light passing through colour filters. The light passing through the filters falls on the red flower. In which colour will the flower appear?
Answer» The figure shows white light passing through colour filters. The light passing through the filters falls on the red flower. In which colour will the flower appear?

5.

The figure shows white light passing through colour filters. The light passing through the filters falls on the red flower. In which colour will the flower appear?

Answer»

The figure shows white light passing through colour filters.

The light passing through the filters falls on the red flower. In which colour will the flower appear?

Discussion

6.	How does the frequency of sound given by a stretched string depend on its (a) length, (b) tension ?
Answer» How does the frequency of sound given by a stretched string depend on its (a) length, (b) tension ?

Discussion

7.	A magnification of a mirror is -1. What kind of a mirror is it, also write the position, nature of the image.
Answer» A magnification of a mirror is -1. What kind of a mirror is it, also write the position, nature of the image.

Discussion

8.	Focal length of a concave lens is 400 cm, then power of the lens is:
Answer» Focal length of a concave lens is 400 cm, then power of the lens is:

Discussion

9.	The initial level of water in a measuring cylinder was 150 ml. When an iron piece of irregular shape is completely immersed, the water level changed to 190 ml. Find the volume of iron.
Answer» The initial level of water in a measuring cylinder was $150 m l$ . When an iron piece of irregular shape is completely immersed, the water level changed to $190 m l$ . Find the volume of iron.

Discussion

10.	D2O is:
Answer» $D_{2} O$ is:

Discussion

11.	In a voltmeter there are 20 divisions between the 0 mark and 0.5 volt mark.Calculate the least count of the voltmeter
Answer» In a voltmeter there are 20 divisions between the 0 mark and 0.5 volt mark.Calculate the least count of the voltmeter

Discussion

12.	What are fossils? How do they act as an evidence for organic evolution?
Answer» What are fossils? How do they act as an evidence for organic evolution?

Discussion

13.	The distance between a compression and the immediate next rarefaction of a longitudinal wave is: (λ denotes wavelength)
Answer» The distance between a compression and the immediate next rarefaction of a longitudinal wave is: ( $λ$ denotes wavelength)

Discussion

14.	Define the term kilowatt- hour and state its value in S.I. unit.
Answer» Define the term kilowatt- hour and state its value in S.I. unit.

Discussion

15.	Which catalyst ionizes hydrogen in hydrogen fuel cell?
Answer» Which catalyst ionizes hydrogen in hydrogen fuel cell?

Discussion

16.	Fill in the following blank with a suitable word: The amount of heat produced by burning a unit mass of a fuel completely is known as its ................ value.
Answer» Fill in the following blank with a suitable word: The amount of heat produced by burning a unit mass of a fuel completely is known as its ................ value.

Discussion

17.	According to the conventions direction of flow of electric current is taken from positive terminal to negative terminal of battery, which is opposite to the flow of ___.
Answer» According to the conventions direction of flow of electric current is taken from positive terminal to negative terminal of battery, which is opposite to the flow of ___.

Discussion

18.	How microphone and loudspeaker are related to each other?
Answer» How microphone and loudspeaker are related to each other?

Discussion

19.	Why we are not able to see the objects when we enter from bright light to a room with dim light?
Answer» Why we are not able to see the objects when we enter from bright light to a room with dim light?

Discussion

20.	Why do magnets have the tendency to attract metals like iron ?
Answer» Why do magnets have the tendency to attract metals like iron ?

Discussion

21.	Inflating a balloon seems to violate Boyle's law. Why?
Answer» Inflating a balloon seems to violate Boyle's law. Why?

Discussion

22.	Q55. FAME- India is related to:
Answer» Q55. FAME- India is related to:

Discussion

23.	Electric field intensity varies with distance as:
Answer» Electric field intensity varies with distance as:

Discussion

24.	How far should be the object be placed from the pole of converging mirror of 20 cm to form a real image of the size exactly 1/4th of the size of object?
Answer» How far should be the object be placed from the pole of converging mirror of 20 cm to form a real image of the size exactly 1/4th of the size of object?

Discussion

25.	A concave mirror produces a three times enlarged image of an object placed at 10cm infront of it .find c But if we take the magnification to be positive we get [virtual imageas produced if the object is placed between o and f]then we get c as 30cm but if we take magnification as negative[real image,as produced if onject is placed between c and f] then we get c as 15 Now among this which should be considered
Answer» A concave mirror produces a three times enlarged image of an object placed at 10cm infront of it .find c But if we take the magnification to be positive we get [virtual imageas produced if the object is placed between o and f]then we get c as 30cm but if we take magnification as negative[real image,as produced if onject is placed between c and f] then we get c as 15 Now among this which should be considered

Discussion

26.	What is the essential physical substance required for all living organisms?
Answer» What is the essential physical substance required for all living organisms?

Discussion

27.	When an object is placed at a distance of 5 cm in front of a convex mirror of focal length 10 cm, then:
Answer» When an object is placed at a distance of 5 cm in front of a convex mirror of focal length 10 cm, then:

Discussion

28.	A substance of mass m1 specific heat capacity C1 at temperature θ1 is mixed with another substance of mass m2 specific heat capacity C2 at a lower temperature θ2. Deduce the expression for the temperature θ of mixture.
Answer» A substance of mass m₁ specific heat capacity C₁ at temperature θ₁ is mixed with another substance of mass m₂ specific heat capacity C₂ at a lower temperature θ₂. Deduce the expression for the temperature θ of mixture.

Discussion

29.	What will happen if a ray of light along the principal axis is incident on a spherical mirror?
Answer» What will happen if a ray of light along the principal axis is incident on a spherical mirror?

Discussion

30.	A charge of 2×10−2 C moves at 30 rev/s in a circle of diameter 80 cm. The current linked with the circuit in one revolution is
Answer» A charge of $2 \times 10^{- 2} C$ moves at $30 r e v / s$ in a circle of diameter $80 c m$ . The current linked with the circuit in one revolution is

Discussion

31.	Earth wire is insulated with?
Answer» Earth wire is insulated with?

Discussion

32.	High tension wires are wires having
Answer» High tension wires are wires having

Discussion

33.	Why mercury is preferred in most of the thermometers?
Answer» Why mercury is preferred in most of the thermometers?

Discussion

34.	The value of √25.3 is
Answer» The value of $\sqrt{25.3}$ is

Discussion

35.	Uses of convex and concave lens ?
Answer» Uses of convex and concave lens ?

Discussion

36.	Calculate the current flowing through a wire of resistance 5 Ω connected to a battery of potential difference 3 V.
Answer» Calculate the current flowing through a wire of resistance 5 $Ω$ connected to a battery of potential difference 3 V.

Discussion

37.	The flocculation value of an electrolyte is
Answer» The flocculation value of an electrolyte is

Discussion

38.	What is the relationship between wavelength and frequency?
Answer» What is the relationship between wavelength and frequency?

Discussion

39.	Question 16 In the given map, the distance between the places is shown using the scale 1 cm : 0.5 km. Then the actual distance (in km) between school and the bookshop is (a) 1.25 (b) 2.5 (c) 2 (d) 1.1
Answer» Question 16 In the given map, the distance between the places is shown using the scale 1 cm : 0.5 km. Then the actual distance (in km) between school and the bookshop is (a) 1.25 (b) 2.5 (c) 2 (d) 1.1

Discussion

40.	Explain how these forms of energies are formed with their advantage and disadvantage? a) ocean thermal energy b) wave energy c) tidal energy
Answer» Explain how these forms of energies are formed with their advantage and disadvantage? a) ocean thermal energy b) wave energy c) tidal energy

Discussion

41.	The smaller the focus of a convex lens more will be its magnifying capacity, so why don't we use magnifying glasses with very small focal length?
Answer» The smaller the focus of a convex lens more will be its magnifying capacity, so why don't we use magnifying glasses with very small focal length?

Discussion

42.	a) A ray of light travelling in the air falls on the surface of a glass slab at an angle 45° with the normal. The refractive index of glass is 1.5. Calculate the angle of refraction. b) A point object is placed at a distance of 18 cm from a convex lens on its principal axis. Its image is formed on the other side of the lens at 27 cm. Calculate the focal length of the lens. [5 MARKS]
Answer» a) A ray of light travelling in the air falls on the surface of a glass slab at an angle 45° with the normal. The refractive index of glass is 1.5. Calculate the angle of refraction. b) A point object is placed at a distance of 18 cm from a convex lens on its principal axis. Its image is formed on the other side of the lens at 27 cm. Calculate the focal length of the lens. [5 MARKS]

Discussion

43.	When 2 mole of C2H6 are completely burnt, 3129 KJ of heat is liberated. Calculate the heat of formation of C2H6.△Hf for CO2 & H2O are -395 KJ and -286 KJ respectively.
Answer» When 2 mole of $C_{2} H_{6}$ are completely burnt, 3129 KJ of heat is liberated. Calculate the heat of formation of $C_{2} H_{6} . △ H_{f}$ for $C O_{2} & H_{2} O$ are -395 KJ and -286 KJ respectively.

Discussion

44.	Does a light ray reflect the refract from a lens?
Answer» Does a light ray reflect the refract from a lens?

Discussion

45.	Why do you think there should be an equitable distribution of resources?what forces would be working against an equitable distribution of our resources?
Answer» Why do you think there should be an equitable distribution of resources?what forces would be working against an equitable distribution of our resources?

Discussion

46.	Under what conditions will a glass lense place in a transparent liquid become invisible?
Answer» Under what conditions will a glass lense place in a transparent liquid become invisible?

Discussion

47.	How r power and focal length of a lens related? U r provided with two lenses of focal length 20cm and 40cm respectively which lens will u use to obtain more convergent light?
Answer» How r power and focal length of a lens related? U r provided with two lenses of focal length 20cm and 40cm respectively which lens will u use to obtain more convergent light?

Discussion

48.	A uniform meter scale is in equilibrium as shown in figure. Find the weight of the scale.
Answer» A uniform meter scale is in equilibrium as shown in figure. Find the weight of the scale.

Discussion

49.	Explain the use of commutator in D.C Generator.
Answer» Explain the use of commutator in D.C Generator.

Discussion

50.	Linear magnification produced by a concave mirror may be : (a) less than 1 or equal to 1 (b) more than 1 or equal to 1 (c) less than 1, more than 1 or equal to 1 (d) less than 1 or more than 1
Answer» Linear magnification produced by a concave mirror may be : (a) less than 1 or equal to 1 (b) more than 1 or equal to 1 (c) less than 1, more than 1 or equal to 1 (d) less than 1 or more than 1

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

An object is kept at 60 cm in front of a plane mirror. If the mirror is now moved 25 cm away from the object, how does the image shift from its previous position ?

What is the forest raw material for rubber? __

A current I flows along the length of an infinitely long, straight, thin-walled pipe, then:

What is the resistance between P &amp; Q?

The figure shows white light passing through colour filters. The light passing through the filters falls on the red flower. In which colour will the flower appear?

How does the frequency of sound given by a stretched string depend on its (a) length, (b) tension ?

A magnification of a mirror is -1. What kind of a mirror is it, also write the position, nature of the image.

Focal length of a concave lens is 400 cm, then power of the lens is:

The initial level of water in a measuring cylinder was 150 ml. When an iron piece of irregular shape is completely immersed, the water level changed to 190 ml. Find the volume of iron.

D2O is:

In a voltmeter there are 20 divisions between the 0 mark and 0.5 volt mark.Calculate the least count of the voltmeter

What are fossils? How do they act as an evidence for organic evolution?

The distance between a compression and the immediate next rarefaction of a longitudinal wave is: (λ denotes wavelength)

Define the term kilowatt- hour and state its value in S.I. unit.

Which catalyst ionizes hydrogen in hydrogen fuel cell?

Fill in the following blank with a suitable word: The amount of heat produced by burning a unit mass of a fuel completely is known as its ................ value.

According to the conventions direction of flow of electric current is taken from positive terminal to negative terminal of battery, which is opposite to the flow of ___.

How microphone and loudspeaker are related to each other?

Why we are not able to see the objects when we enter from bright light to a room with dim light?

Why do magnets have the tendency to attract metals like iron ?

Inflating a balloon seems to violate Boyle's law. Why?

Q55. FAME- India is related to:

Electric field intensity varies with distance as:

How far should be the object be placed from the pole of converging mirror of 20 cm to form a real image of the size exactly 1/4th of the size of object?

What is the essential physical substance required for all living organisms?

When an object is placed at a distance of 5 cm in front of a convex mirror of focal length 10 cm, then:

A substance of mass m1 specific heat capacity C1 at temperature θ1 is mixed with another substance of mass m2 specific heat capacity C2 at a lower temperature θ2. Deduce the expression for the temperature θ of mixture.

What will happen if a ray of light along the principal axis is incident on a spherical mirror?

A charge of 2×10−2 C moves at 30 rev/s in a circle of diameter 80 cm. The current linked with the circuit in one revolution is

Earth wire is insulated with?

High tension wires are wires having

Why mercury is preferred in most of the thermometers?

The value of √25.3 is

Uses of convex and concave lens ?

Calculate the current flowing through a wire of resistance 5 Ω connected to a battery of potential difference 3 V.

The flocculation value of an electrolyte is

What is the relationship between wavelength and frequency?

Question 16 In the given map, the distance between the places is shown using the scale 1 cm : 0.5 km. Then the actual distance (in km) between school and the bookshop is (a) 1.25 (b) 2.5 (c) 2 (d) 1.1

Explain how these forms of energies are formed with their advantage and disadvantage? a) ocean thermal energy b) wave energy c) tidal energy

The smaller the focus of a convex lens more will be its magnifying capacity, so why don't we use magnifying glasses with very small focal length?

When 2 mole of C2H6 are completely burnt, 3129 KJ of heat is liberated. Calculate the heat of formation of C2H6.△Hf for CO2 &amp; H2O are -395 KJ and -286 KJ respectively.

Does a light ray reflect the refract from a lens?

Why do you think there should be an equitable distribution of resources?what forces would be working against an equitable distribution of our resources?

Under what conditions will a glass lense place in a transparent liquid become invisible?

How r power and focal length of a lens related? U r provided with two lenses of focal length 20cm and 40cm respectively which lens will u use to obtain more convergent light?

A uniform meter scale is in equilibrium as shown in figure. Find the weight of the scale.

Explain the use of commutator in D.C Generator.

Linear magnification produced by a concave mirror may be : (a) less than 1 or equal to 1 (b) more than 1 or equal to 1 (c) less than 1, more than 1 or equal to 1 (d) less than 1 or more than 1

What is the resistance between P & Q?

When 2 mole of C2H6 are completely burnt, 3129 KJ of heat is liberated. Calculate the heat of formation of C2H6.△Hf for CO2 & H2O are -395 KJ and -286 KJ respectively.