Physics - Single MCQs (Page 5)

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Q41. The SI base unit for mass is...Q42. There is no SI base unit for area because...Q43. In 1866, the U. S. Congress defined the U. S. yard as exactly 3600/3937 internat...Q44. Which of the following is closest to a yard in length...Q45. A nanosecond is...Q46. The SI standard of time is based on...Q47. The ozone hole that has been detected lies in the atmosphere above...Q48. Name the process of production of energy in the Sun...Q49. Amount of water vapour in the atmosphere is measured in terms of...Q50. For a person having hypermetropia, the near point is...