41. The unit of approximate distance from the earth to the sun is-
42. Which of the following is the smallest unit?
43. Henry per meter is the unit of . . . . . . . .
44. The amount of radiation being emitted by a radioactive material is measured using the conventional unit . . . . . . . .
45. The unit of work is
46. How many watts are there in a horsepower?
47. One parsec is equal to . . . . . . . . light year
48. The apparatus used to measure intensity of sound is
49. Which one of the following is not correctly matched?
50. The smallest unit of length is
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