Physics MCQ Questions Answers General Knowledge Set

21)Optical fibre mainly used in communication is based on

a) Less absorption coefficient

b) Less scattering

c) Total internet reflection

d) Refraction

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Option – c)

22) If there was were no gravity , which of the following will not be there for a fluid ?

a) Viscosity

b) Pressure

c) Archimeds’s upward thrust

d) Surface tension

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Option -b)

23) Post office box is a device for measuring resistant based on the principle of

a) Poteniometer

b) Meter bridge

c) Ohm meter

d) Galvanometer

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Option -b)

24) The phenomenon of bursting of hydrogen balloon is based on

a) Charle’s law

b) Boyle’s law

c) Henry’s law

d) Bernoulli’s law

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Option -a)

25) The image from by an object of a compound microscope is

a) Virtual and enlarged

b) Virtual and diminish

c) Real and diminish

d) Real and enlarged

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Option – d)

26) A mirror products magnified erect image of and object. The nature of the mirror is

a) Convex

b) Concave

c) Plane

d) Neither convex nor convene

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Option -b)

27) What enables us to write on the black board with chalk?

a) Gravity

b) Cohesion

c) Adhesion

d) Viscosity

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Option – c)

28) By which one of the following , and old written material which cannot be read easily, can be read ?

a) a- ray

b) y-ray

c) X-ray

d) IR-ray

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Option -d)

29) Which one of the following has given the centripetal force for a car moving on a road ?

a) Force of breaks

b) The driver of the car

c) Force by the steering wheel

d) Friction due to tyres

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Option – d)

30) Which one of the following is correct when a body moving in a circular path with constant speed ?

a) The body has constant acceleration

b) The body has constant retardation

c) The body has variable acceleration

d) The body has constant velocity and variable speed

View Answer
Option – c)
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