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Physics quiz 25

Physics quiz 25

Physics is the branch of science that deals with the structure of matter and how the fundamental constituents of the universe interac

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Quiz Questions And Answers

The freezer in a refrigerator is fitted near the top:

to keep it away from hot compressor which is nearer to the bottom.
because of convenience.
it facilitates convection currents.
to minimise power consumption.

Why two thin shirts can keep us warmer than a single thick shirt in winter?

Two thin shirts become thicker to prevent transmission of heat.
The Air layer between two shirts works as a good conductor.
The Air layer between two shirts behaves like insulating media.
No radiation of heat takes place

Sound cannot pass through:

water
steel
air
vacuum

Water is not effective in extinguishing a fire caused by petrol because:

the flame is too hot for water to cool it down.
water and petrol react chemically.
water and petrol are miscible with each other.
water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn.

An egg sinks in soft water but floats in a concentrated solution of salt because:

egg absorbs salt from the solution and expands.
albumin dissolves in salt solution and egg becomes lighter.
the density of salt solution exceeds the density of eggs.
water has high surface tension.

What should a person on a freely rotating turn table do to decrease his (angular) speed?

Bring his hands together.
Raise his hands up.
Spread his hands outwards.
Sit down with raised hands.

Which of the following celestial bodies contains abundant quantities of helium 3, a potential source of energy?

Earth
Moon
Venus
Saturn

Which of the following circuit elements is used to block DC in an electronic circuit?

Resistances
Capacitance
Inductance
Diode

Spectacles used for viewing 3D films have:

Bifocal lens
Convex lens
Concave lens
Polaroids

A boy sitting in an open car moving with the constant speed throws a ball straight up into the air. The ball falls:

behind him
in front of him
into his hand
by his side
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