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MHT CET 2020 (16 Oct, Shift 1) · Photoelectric Effect: Einstein's Equation

Photoelectric Effect: Einstein's Equation question from MHT CET 2020 (16 Oct, Shift 1)

Q120MHT CET 2020 · 16 OCT · SHIFT 1Easy

Photoelectric Effect: Einstein's Equation

The maximum velocity of the photoelectron emitted by the metal surface is $v$ . Charge and mass of the photoelectron is denoted by $e$ and $m$ , respectively. The stopping potential in volt is

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Answer: (a)

$eV_0 = \frac{1}{2}mv^2$
$V_0 = \frac{mv^2}{2e} = \frac{v^2}{2(e/m)}$
So the answer is (a) $\frac{v^2}{2\left(\frac{e}{m}\right)}$ .

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