PHYSICS MULTIPLE CHOICE QUESTIONS SET 149

PHYSICS 

MULTIPLE CHOICE QUESTIONS SET 149

1. An oil drop spreads over water because
(a)oil Is lighter than water
(b)oil is more viscous
(c)oil does not mix with water
(d)surface tension of oil is much smaller than that of water

2. The device which convert AC to DC is :
(a)Oscillator
(b) Amplifier
(c) Rectifier
(d) None of these

3. Knot is a measure of
(a)The speed of ship
(b)The curvature of spherical objects
(c)Solar radiation
(d)Intensity of earthquake shock

4. When the main switch of the house is put off it disconnects the
(a)live wire only
(b)live wire and the earth wire
(c)live wire and the neutral wire
(d)earth wire and the neutral wire

5. Heat from the sun reaches earth by the process of
(a)Conduction
(b)Convection
(c)Radiation
(d)All of the above

6. Which of the following produces more severe bums ?
(a)Boiling water
(b)Hot water
(c)Steam
(d) Melting iceberg

7. The sudden fall of atmospheric pressure indicates
(a) fair weather
(b) storm
(c) rain
(d) cold weather

8. Magnetism in materials is due to
(a)electrons at rest
(b)circular motion of electrons
(c)protons at rest
(d)all neutrons at rest

9. Short sight in human eye can be corrected by using proper
(a)convex lens
(b)concave lens
(c)cylindrical lens
(d)bifocal lens

10. What is the reason for twinkling of stars ?
(a)Dispersion of light
(b) Total internal reflection
(c)Atmospheric reflection
(d)Atmospheric refraction
ANSWER: 

1 d 

2 c 

3 a 

4 c 

5 c 

6 c 

7 b 

8 b 

9 b 

10 d