When an electron in hydrogen atom revolves in a stationary orbit, it (a) does not radiate light though its velocity changes (b) does not radiate light and velocity remains unchanged (c) radiates light but its velocity is unchanged (d) radiates light with the change of energy

Answer: (a). In a stationary (Bohr) orbit the electron does not radiate energy, by Bohr's postulate. Its speed is constant but direction keeps changing, so velocity changes. So the answer is (a).

When an electron in hydrogen atom revolves in a stationary orbit, it | MHT CET 2026 (13 May, Shift 2)

Q1MHT CET 2026 · 13 MAY · SHIFT 2Easy

Bohr Model: Orbits, Speed & Angular Momentum

When an electron in hydrogen atom revolves in a stationary orbit, it

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Answer: (a)

In a stationary (Bohr) orbit the electron does not radiate energy, by Bohr's postulate.
Its speed is constant but direction keeps changing, so velocity changes.
So the answer is (a).

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