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Physics 10th Class English Medium Unit 3 Online Test MCQs With Answers

Question # 1

Magnification of mirror is given by:

Choose an answer

m=p/q

m=q/p

m=pxq

m=1/p+q

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Question # 2

The refractive index of internal coating of optical fibre is:

Choose an answer

1.56

1.51

1.53

1.58

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Question # 3

Focal length for concave mirror is :

Choose an answer

-ve

+ve

same

none of these

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Question # 4

To see from submarine the ship at the surface of water , we use:

Choose an answer

Telescope

Microscope

Peri scope

Prism

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Question # 5

When light passes through a prism it deviates from its original path due to:

Choose an answer

Reflection

Diffraction

Interference

Refraction

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Question # 6

The minimum value of angle of deviation is called:

Choose an answer

Minimum angle

incident angle

angle of minimum deviation

None of these

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Question # 7

Power of lens is:

Choose an answer

q/p

1/q

1/p

1/f

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Question # 8

The point through which rays of light pass after reflection from concave mirror is called principal:

Choose an answer

Focus

Circle

Axis

Radius

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Question # 9

Angle opposite to the base of triangle of prism is called:

Choose an answer

angle of incidence

angle of refraction

angle of prism

emerging angle

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Question # 10

What does the term e-mail stand for:

Choose an answer

Emergency mail

Electronic mail

Extra mail

External mail

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Question # 11

Totally reflecting prism turns the incident ray at an angle of:

Choose an answer

90^o

60^o

75^o

45^o

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Question # 12

The index of refraction depends on:

Choose an answer

The focal length

The speed of light

the image distance

The object distance

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