SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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SI unit for length
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mm
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m
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cm
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km
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Explanation:
Detailed explanation-1: -The meter (m) is defined by taking the fixed numerical value of the speed of light in vacuum c to be 299, 792, 458 when expressed in the unit m s−1, where the second is defined in terms of ∆Cs.
Detailed explanation-2: -All the four units given are used for measurement of length but the SI unit of length is metres. So, the SI unit of length is metre. So, the correct answer is “Option A”.
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