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Question

Planck's constant has the dimensions


A

[M2L2T-2]

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B

[MLT-2]

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C

[ML2T-2]

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D

[ML2T-1]

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Solution

The correct option is D

[ML2T-1]


  1. Planck's constant relates the energy of a photon to its corresponding frequency using the formula, E=hν where, E is the energy, his Planck's constant,ν is frequency.
  2. The S.I unit of Planck's constant is J.s
  3. The Dimension of energy E is [ML2T-2].
  4. Dimension of frequency v is [T-1].
  5. Hence the dimension of Planck's constant h is [ML2T-1].

Hence, option D is the correct answer.


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