The value of Planck's constant is

Physics Units, Dimensions and Measurement Units Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: September 12, 2026

The value of Planck's constant is

\(6.63 \times 10^{-34} \mathrm{J} \cdot \mathrm{s}\)

\(6.63 \times 10^{-34} \mathrm{J\cdot s}\)

\(6.63 \times 10^{-34} \, \mathrm{kg\,m}^2\,/\mathrm{s}\)

\(6.63 \times 10^{-34} \mathrm{kg/s}\)

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The correct answer is:

Planck's constant is a fundamental physical constant that relates the energy of a photon to the frequency of its electromagnetic wave. The exact value of Planck's constant is approximately 6.626 × 10^{-34} J·s. Therefore, the correct option representing Planck's constant is Option A.

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