JEE Main 2021 (27 Aug, Shift 2) Physics Q19: A…

Question

A monochromatic neon lamp with wavelength of 670.5 nm illuminates a photo-sensitive material which has a stopping voltage of 0.48 V. What will be the stopping voltage if the source light is changed with another source of wavelength of 474.6 nm ?

(1) $0.96\ \mathrm{V}$
(2) $1.5\ \mathrm{V}$
(3) $1.25\ \mathrm{V}$ Official answer
(4) $0.24\ \mathrm{V}$

Official answer

Option 3

NTA final key.

Accepted Answer

Option 3: $1.25\ \mathrm{V}$

Answer

$0.96\ \mathrm{V}$

Answer

$1.5\ \mathrm{V}$

Answer

$1.25\ \mathrm{V}$

Answer

$0.24\ \mathrm{V}$

JEE Main 27 August 2021, Shift 2, Physics Q19

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