When UV light of wavelength 300 nm is incident on the metal surface having work function 2.13 eV, electron emission takes place. The stopping potential is: (Given hc = 1240 eV nm) (a) 4 V (b) 2 V (c) 4.1 V (d) 1.5 V

Answer: (b). E = (1240)/(300) = 4.13 eV eV₀ = 4.13 - 2.13 = 2 eV So the answer is (b) 2 V.

When UV light of wavelength 300 nm is incident on the metal surface… | JEE Main 2024 (6 Apr, Shift 2)

Q54JEE Main 2024 · 6 APR · SHIFT 2Easy

Photoelectric Effect: Einstein's Equation

When UV light of wavelength $300\text{ nm}$ is incident on the metal surface having work function $2.13\text{ eV}$ , electron emission takes place. The stopping potential is:

(Given hc $= 1240\text{ eV nm}$ )

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Answer: (b)

$E = \frac{1240}{300} = 4.13\text{ eV}$
$eV_0 = 4.13 - 2.13 = 2\text{ eV}$
So the answer is (b) 2 V.

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