NEET 2023 Phase 2 · PhysicsAngular momentumPrevious Year Question
The angular momentum of an electron moving in an orbit of hydrogen atom is 1.5(h/π). The energy in the same orbit is nearly:
Answer: (C) –1.5 eV. Answer: (c) –1.5 eV Solution: Angular momentum L = nh/2π.
- A.–1.3 eV
- B.–1.4 eV
- C.–1.5 eV✓
- D.–1.6 eV
Correct Answer
(C) –1.5 eV
Solution & Explanation
Answer: (c) –1.5 eV Solution: Angular momentum L = nh/2π. Given L = 1.5(h/π) = 1.5×(2)(h/2π) = 3h/2π, so n = 3. Energy E₃ = −13.6/3² = −13.6/9 = −1.51 eV ≈ −1.5 eV.
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