Sets
Physics Set 10
30 questions 1. Echoes are strongest from:
2. The accepted value of the charge on an electron is:
3. A lever or an inclined plane can reduce the force required for a task, but not the:
4. On the equator, the duration of sunlight is always:
5. The escape speed from the surface of the Moon is approximately:
6. Consider the following statements about the New Cartesian Sign Convention:
(I) The object is always placed to the left of the mirror.
(II) Distances measured to the right of the origin are taken as positive.
(III) Distances measured perpendicular to and above the principal axis are taken as negative.
Which of the above is/are correct?
7. Motion that repeats its path after a fixed interval of time is called:
8. The number 3.865 rounded off to three significant figures is:
9. An electric iron consumes 2 kW of power at 220 V. Among domestic fuses rated 1 A, 2 A, 3 A, 5 A and 10 A, the suitable fuse is:
10. The maximum change in the density of air in a compression, compared to the average density, is the:
11. In humans, sound is produced by the vibration of:
12. Which of the following has no dimensions?
13. A body in uniform circular motion has non-zero acceleration because:
14. A piston oscillating in an air-filled tube produces a sound wave of frequency 50 Hz. The number of oscillations completed by the piston in one minute is:
15. When a ray of light is incident along the normal to a mirror, the angle of reflection is:
16. In a regular year, the Indian National Calendar begins on:
17. The image formed by the eye lens on the retina is:
18. Consider the following pairs:
(I) North pole – North pole: Repulsion
(II) North pole – South pole: Attraction
(III) South pole – South pole: Attraction
Which of the pairs given above is/are correctly matched?
19. For an incompressible fluid, the equation of continuity expresses conservation of:
20. A clap in an empty corridor is heard as an echo after 0.8 s. If the speed of sound is 340 m s⁻¹, the distance of the wall is: