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An astronomical unit of distance is

A. a kilometre

B. light year

C. the average distance from the earth to the sun

D. None of the above

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  1. When an incident beam of light strikes the surface of a glass slab normally, the refracted beam
  2. The light from the star nearest to the sun reaches the earth in
  3. A boy sitting in a train moving with a uniform velocity drops a coin outside. A man standing outside…
  4. In the fuse of an electrical installation blows out
  5. Mercury is used in a barometer because
  6. A permanent magnet may be demagnetised by
  7. Hot water is poured simultaneously in four metallic tumblers painted outside with different paints.…
  8. The temperature, surface features, length of days and nights of a planet depend on
  9. Echoes are produced by
  10. When a bullet is fired from a gun
  11. The maximum range of most TV signals is from 121 to 240 km only because
  12. A star contains
  13. If a band is played on the moon the sound will
  14. The resistance of a wire depends on
  15. The colour or an opaque object is due to the colour it
  16. When a particle in motion is acted upon by a force in a direction perpendicular to the direction of…
  17. A lactometer la used to
  18. A ruse wire is characterised by
  19. Credit for starting Space Science Research in India goes to
  20. Under similar conditions of temperature and pressure, the velocity of sound is maximum in
  21. The inside of both the walls of a thermos flask is silvered i.e., on the vacuum side in order to reduce…
  22. Separating particles from a suspension is effected by
  23. When are temperature resistance
  24. Red Light is used as a dancer signal because
  25. Rain drops acquire spherical shape due to
  26. The weight of a body is
  27. Tap water is placed in an open pad and allowed to evaporate. After some time the temperature of water
  28. The mirage is a phenomenon
  29. The Space Application Centre for training in Satellite Communication Technology is located at
  30. The instrument used to measure the strength of electric current at a point is