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MHT CET 2019 (2 May, Shift 1) · Photoelectric Effect: Einstein's Equation

Photoelectric Effect: Einstein's Equation question from MHT CET 2019 (2 May, Shift 1)

Q128MHT CET 2019 · 2 MAY · 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: (b)

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

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