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

View Answer
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)