1. In case of free fall, fall the gravitational acceleration on the spherical object depends on
a. the mass of an object b. the radius of an object c. the density of the object d. none of the above
2. A person has weight 9N on the Moon then his weight on the Earth is
a. 3N b. 15N c. 45N d. 54N
3. The SI unit of electric current is
a. Volt b. Faraday c. Ampere d. Ohms
4. An electric generator converts
a. Electrical energy into mechanical energy b. Mechanical energy into heat energy
c. Electrical energy into chemical energy d. Mechanical energy into electrical energy
5. The device used for the production of electric current is called
a. generator b. galvanometer c. ammeter d. motor
6. DC generator is based on the principle of
a. electrochemical induction b. electromagnetic induction
c. magnetic effect of current d. heating effect of current
7. In Nepal, the frequency of alternating current (AC) supply is
a. 0 Hz b. 50Hz c.60Hz d. 100 Hz
8. The type of light wave is
a. transverse wave b. longitudinal wave c. both a & b d. none
9. The speed of sound in the water is....the speed of sound in air
a. same as b. less than
c. greater than d. sometimes greater and sometimes lesser
10. If the distance between two bodies is doubled, then the change in the force of attraction between them is
a. 2F b. F/2 c. 4F d. F/4
11. A transformer having 100 turns of primary side is applied with 200 volt AC. In order to get 400 volt AC on secondary side, the number of turns on the secondary side must be
a. 200 b.800 c. 50 d. 100
12. We could see the twinkling of stars which is due to
a. reflection of light b. refraction of light c. scattering of light d. polarization of light
13. In which kind of defect, image of a distant object is formed in front of retina?
a. myopia b. cataract c. hypermetropia d. presbyopia
14. A concave lens with correct power can help a person with
a. Hypermetropia b. Myopia c. Presbyopia d. None of these
15. When our eye see a near object, its lens become?
a. Expand b. Remain same c. Contract d. None
16. A convex lens from a virtual magnified image when an object is placed............
a. at 2F b. between F and 2F c. at infinity d. between Optical Centre and F
17. If the power of lens is -2D, then its focal length is
a. -2 m b. 0.5 m c. -0.55 m d. -0.5 m
18. Which formula is used to calculate the power in electricity?
a. P = Wxt b. P = V/I c. P = VxI d. P = t/W
19. If the mass of a body remains constant but its velocity is increased by 3 times, then how many times its kinetic energy will be increased?
a. 3 times b. 6 times c. 9 times d. 12 times
20. When an object is thrown vertically upward, on reaching the highest point, the value of acceleration due to gravity will be
a. 4.9 m/s^2 b. 9.8 m/s^2 upwards c. 9.8 m/s^2 towards the ground d. 0 m/s^2
Answers:
1. d 2. d 3. c 4.d 5. a 6. b 7. b 8. a 9. c 10. d 11.a 12. b 13. a 14. b 15. a 16. d 17. d
18. c 19. c 20. b 21.