1. The moon revolves around the earth once in
(1) 30 days
(2) 385 days
(3) 24 hours
(4) 27.3 days
2. The life of the sun is estimated to be around
(1) 12,000 million years
(2) 10,000 million years
(3) 15,000 million years
(4) 5000 million years
3. The distance between the Sun from the Earth is
(1) 150 billion km
(2) 150 million km
(3) 100 million km
(4) 100 billion km
4. The smallest planet of solar system is
(1) Venus
(2) Jupiter
(3) Mercury
(4) Earth
5. The surface temperature of the sun is about
(1) 6000 degree C
(2) 5000 degree C
(3) 10,000 degree C
(4) 5500 degree C
6. The number of constellation is
(1) 12
(2) 88
(3) 42
(4) 22
7. A parallel ray of light after refraction from a convex lens will pass through the
(1) centre of curvature
(2) focus
(3) optical lens
(4) none of these
8. Twinkling of stars is due to the phenomenon of
(1) reflection
(2) refraction
(3) rectilinear propagation
(4) none of these
9. The device used to measure the liquid pressure is
(1) Thermometre
(2) lactometer
(3) barometer
(4) manometer
10. The transformer used to step-up the voltage supplied by electric supply station is
(1) dynamo
(2) transformer
(3) electromagnet
(4) generator
