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The unit of Planck's constant is

A. Js

B. Js–2

C. J/s

D. Js2

Answer: Option A

Solution (By Examveda Team)

The dimension of Planck's constant is the product of energy multiplied by time, a quantity called action. Planck's constant is often defined, therefore, as the elementary quantum of action. Its value in metre-kilogram-second units is defined as exactly 6.62607015 × 10-34 joule second.

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