PHYSICS MULTIPLE CHOICE QUESTIONS SET 154

PHYSICS 

MULTIPLE CHOICE QUESTIONS SET 154

 1. Why two thin shirts can keep us warmer than a single thick shirt in winter ?
(a)Two thin shirts become thicker so prevent transmission of heat
(b)Air layer between two shirts works as good conductor
(c)Air layer between two shirts behaves like insulating media
(d)No radiation of heat takes place

2. Which layer of the earth’s atmosphere reflect back the radio waves to the earth’s surface ? (a)ionosphere
(b)stratosphere
(c)mesosphere
(d) exosphere

3. Sound cannot pass through
(a) water
(b) steel
(c) air
(d) vacuum

4. In a photocell light energy is converted into
(a)potential energy
(b)chemical energy
(c)heat energy
(d)electrical energy

5. A storm is predicted if atmospheric pressure
(a)rises suddenly
(b)rises gradually
(c)falls suddenly
(d)falls gradually

6. What should a person on a freely rotating turn table do to decrease his (angular) speed ?
(a)Bring his hands together
(b)Raise his hands up
(c)Spread his hands outwards
(d)Sit down with raised hands

7. Which of the following celestial bodies contains abundant quantities of helium3 a potential source of energy ?
(a) Earth
(b) Moon
(c) Venus
(d) Saturn

8. Smog is a combination of
(a)Air and water vapours
(b)Water and smoke
(c)Fire and water
(d)smoke and fog

9. Which of the following circuit elements is used to block DC in an electronic circuit ?
(a)Resistances
(b)Capacitance
(c)Inductance
(d)Diode

10. Spectacles used for viewing 3D films have
(a)Bifocal lens
(b)Convex lens
(c)Concave lens
(d)Polaroid’s 

Answer:
1 c 
2 a 
3 d 
4 d 
5 c 
6 c 
7 b 
8 d 
9 b 
10 d