PHYSICS MULTIPLE CHOICE QUESTIONS SET 155

PHYSICS 

MULTIPLE CHOICE QUESTIONS SET 155

1. A boy sitting in an open car moving with the constant speed throws a ball straight up into the air. The ball falls
(a)behind him
(b)in front of him
(c)into his hand
(d)by his side

2. The process involved in making soap is transformer transformer transformer 
(a)saponification
(b)hydrolysis
(c)condensation
(d)polymerisation

3. A kilowatt-hour is unit of
(a)Energy
(b)Power
(c)Electric charge
(d)Electric current

4. Ventilators are provided near the ceiling of the room because
(a)the exhaled warmer air rises up and goes out
(b)these provide cross ventilation in the room
(c)these provide some sunlight in the room
(d)these do not look nice in the lower part

5. The hair of shaving brush clings together when removed from water due to
(a)Surface tension
(b)Viscosity
(c)Elasticity
(d)Friction

6. In severe winter in cold countries water pipes burst because
(a)water expands on freezing
(b)contraction of water pipes
(c)high atmospheric pressure
(d)combined effect of all the above three.

7. In the process of magnetization of a bar
(a)The entire bulk of the bar gets magnetised
(b)Only the surface of the bar gets magnetised
(c)Only the ends of the bar get magnetised
(d)Only some parts of the outer layers of the bar get magnetized

8. A falling drop of rain water acquires the spherical shape due to
(a)Viscosity
(b)Surface Tension
(c)Atmospheric pressure
(d)Gravitational force

9. The weakest of all fundamental forces is
(a)Gravitational force
(b)Electrostatic force
(c)Magnetic force
(d)Nuclear force

10. Velocity of sound in air does not change with the change of
(a)Temperature of air
(b)Pressure of air
(c)Moisture content in air
(d)Wind in the direction of propagation of sound
 
ANSWER:
1 a 
2 a 
3 a 
4 a 
5 a 
6 a 
7 a 
8 b 
9 a 
10 b