CUET · PHYSICS · PYQ PAPER 2025
The angular momentum of an electron in the third orbit of a hydrogen atom is
(Given: \( h = 6.6 \times 10^{-34} \text{ Js} \))
- A \( 1.15 \times 10^{-34} \text{ Js} \)
- B \( 2.15 \times 10^{-34} \text{ Js} \)
- C \( 3.15 \times 10^{-34} \text{ Js} \)
- D \( 4.12 \times 10^{-19} \text{ Js} \)
Answer & Solution
Correct Answer
(C) \( 3.15 \times 10^{-34} \text{ Js} \)
Step-by-step Solution
Detailed explanation
\( L = \frac{nh}{2\pi} \) \( L = \frac{3 \times 6.6 \times 10^{-34}}{2 \times 3.14159} \) \( L \approx 3.15 \times 10^{-34} \text{ Js} \)
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