PHYSICS MULTIPLE CHOICE QUESTIONS SET 159

PHYSICS 

MULTIPLE CHOICE QUESTIONS SET 159

1. The bats can fly in the dark because
(a)they can see the objects in darkness
(b)they have weak legs and are likely to be attacked by predators
(c)they generate flashes of light
(d)they generate ultrasonic sound waves

2. What changes will happen to a bowl of ice and water kept at exactly zero degree Celsius ?
(a)All ice will melt
(b)All water will become ice
(c)No change will happen
(d)Only some ice will melt

3. Cupric point is the temperature at which
(a)Matter becomes radioactive
(b)A metal loses magnetic properties.
(c)A metal loses conductivity
(d)Transmutation of metal

4. Angle of friction and angle of repose are
(a)equal to each other
(b)not equal to each other
(c)proportional to each other
(d) None of the above

5. If a boy sitting in a train which is moving at a constant velocity throws a ball straight up into the air the ball will
(a) fall in front of him
(b) fall behind him
(c)fall into his hand
(d)None of the above

6. Intensity of gravitational field of earth is maximum at
(a)Poles
(b)Equator
(c) Centre of earth
(d) Surface

7. The spokes Used in the wheel of a bicycle increase its
(a)Moment of inertia
(b)Velocity
(c)Acceleration
(d) Momentum

8. A transformer works on the principle of
(a)Self induction
(b)Mutual induction
(c)Generator
(d)Inverter

9. The sky appears blue because
(a)all colours interfere to produce blue
(b)in white light the blue component dominates
(c)the atmosphere scatters blue colour more than the others
(d) it is actually blue

10. When a ship enters the sea from a river
(a)it rises a little
(b)it sinks a little
(c)It remains at the same level
ANSWER: 
1 d 
2 c 
3 b 
4 a 
5 c 
6 a 
7 a 
8 b 
9 c 
10 a