PHYSICS MULTIPLE CHOICE QUESTIONS SET 143

PHYSICS 

MULTIPLE CHOICE QUESTIONS SET 143

1. A person standing on a railway platform listens to the whistles of arriving and departing trains. The whistle heard is
(a)the same in both cases in all respects
(b)of higher intensity when train arrives
(c)of higher pitch when train arrives
(d)of higher pitch when train departs

2. Holography is a technique of
(a)recording a permanent sharp two dimensional black and white or multicolor photograph
(b)recording a permanent three dimensional multicolour photograph
(c)recording a permanent three dimensional black and white photograph
(d)recording a permanent three dimensional photograph of a given single colour or a multicolor

3. An ice block with a piece of lead embedded in it floats in water. If ice melts the water level
(a) Rises
(b) Falls
(c)Remains same
(d)Falls first and then rises

4. The velocity of heat radiation in vacuum is
(a)Equal to that of light
(b)Less than that of light
(c)Greater than that of light
(d)Equal to that of sound

5. The plastic material commonly used for making gear wheels is
(a) Polyesters
(b) Nylons
(c) Bakelite
(d) Polystyrene

6. Which of the following is used in oven ?
(a) X-rays
(b) UV rays
(c) Microwaves
(d) Radio waves

7. When heated from 0° to 10°C volume of a given mass of water Will
(a)Increase gradually
(b)Decrease gradually
(c)Increase and then will decrease
(d)Decrease and then will increase

8. Energy is continuously created in the sun due to:
(a) nuclear fusion
(b) nuclear fission
(c) radioactivity
(d) artificial radioactivity

9. Coolis tube is used to produce
(a)Radio waves
(b)Microwaves
(c)X-rays
(d) Gama rays

10. Which of the following is used for regulated electric supply ?
(a)Zener diode 
(b)Junction diode
(c)Gun diode
(d)Tunnel diode 

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