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Physics English Medium Fsc Part 1 Chapter 10 Online MCQs Test MCQs With Answers

Question # 1

The types of optical fibres are

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Three

Four

Five

Six

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Question # 2

The ratio of size of image and size of object is

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Focal length

Magnification

Resolving power

Principle focus

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Question # 3

The Detector in Photo phone is made up of.

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Cadmium

Germanium

Selenium

Silicon

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Question # 4

Multimode step index fiber is useful for.

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Long distance

Sort distance

Very long distance

Infinite distance

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Question # 5

The focal length of a concave lens is always

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+ve

-ve

Zero

None of these

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Question # 6

The least distance of distinct vision for the normal eye is.

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15 cm

25 cm

125 cm

25 m

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Question # 7

If an object lies at focus point F in front of a converd lens, its image is formed at.

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Infinity

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Question # 8

The accepted value for speed of light in vacuum

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2.99 x 10⁸m - sec^-1

2.99 x 10⁶m - sec^-1

2.99 x 10⁸km - sec^-1

2.99 x 10⁸m - h^-1

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Question # 9

If an object is placed with in the focal length of a convex lens, its image is formed.

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Real

Inverted

Virtual

Smaller than object

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Question # 10

If the object is at 5 cm from the lens of simple microscope than its magnifying power will be.

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Question # 11

Multimode graded index fibre has a core whose diameter range lie from.

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5 to 50 micro meter

50 to 100 micro meter

40 to 1000 micro meter

50 to 10,000 micrometer

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Question # 12

The magnifying power of an astronomical telescope is 10. If the focal length of objective is 100 cm, then what is the focal length of eye piece.

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10 cm

100 cm

1000 cm

5 cm

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