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  1. The unit of Planck's constant is

    2. A.

     Js
    B.

     Js–2
    C.

     J/s
    D.

     Js2

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    Answer : Option A

    Explanation :

    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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