NEET Physics Bohr Model MCQ Question
What is the wavelength of an electron revolving in a Bohr orbit with velocity 2.2 × 10^6 m/s and mass 9.1 × 10^-31 kg?
31 × 10^-10 m
65 × 10^-10 m
6.62 × 10^-11 m
55 × 10^-10 m
Correct Answer
Detailed Explanation
Using de Broglie's hypothesis, the wavelength λ = h/mv, where h = 6.63 × 10^-34 Js, m = 9.1 × 10^-31 kg, and v = 2.2 × 10^6 m/s. λ = 6.63 × 10^-34 / (9.1 × 10^-31 × 2.2 × 10^6) = 3.31 × 10^-10 m.
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