In hydrogenth atom, an electron jumps from higher orbit to lower orbit so that radius of the lower orbit is (1/4) of radius of higher orbit. If speed of electron in higher orbit was V, then speed in lower orbit is (a) V/4 (b) V/2 (c) V (d) 2V

Answer: (d). r ∝ n²: r becomes 1/4, so n becomes half. v ∝ 1/n, so v doubles. So the answer is (d) 2V.

In hydrogenth atom, an electron jumps from higher orbit to lower… | MHT CET 2026 (14 May, Shift 2)

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Bohr Model: Orbits, Speed & Angular Momentum

In hydrogenth atom, an electron jumps from higher orbit to lower orbit so that radius of the lower orbit is $\left(\frac{1}{4}\right)$ of radius of higher orbit. If speed of electron in higher orbit was V, then speed in lower orbit is

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Answer: (d)

$r \propto n^2$ : $r$ becomes $\frac{1}{4}$ , so $n$ becomes half.
$v \propto \frac{1}{n}$ , so $v$ doubles.
So the answer is (d) $2V$ .

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