Physics Dawn of Modern Physics UHS 2024
PMDC Verified Question 7 of 52
The value of Plank constant is
A
\( 6.63 \times 10^{-34} \text{ Js} \)
B
\( 6.63 \times 10^{34} \text{ Js} \)
C
\( 6.63 \times 10^{-34} \text{ Js}^{-1} \)
D
\( 6.63 \times 10^{34} \text{ Js}^{-1} \)
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: \( 6.63 \times 10^{-34} \text{ Js} \)
Concept:

Planck's constant is the fundamental proportionality factor in quantum mechanics, anchoring the energy of photons to their respective wave frequencies.

Formula:

$$ h = \frac{E}{f} $$

Solution:

  • The scientifically established universal constant value is \( 6.626 \times 10^{-34} \text{ J}\cdot\text{s} \).


  • It quantifies the "action" in the quantum realm, dictating the step-sizes of energy quantization.


Why other options are incorrect:

Positive exponents represent numbers larger than the observable universe, completely violating the microscopic nature of quantum mechanics. \( \text{Js}^{-1} \) represents a unit of Power (Watts), not Action.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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