Physics · 2022
JEE Main · 26 June 2022, Shift 2 · Q47
A metal surface is illuminated by a radiation of wavelength 4500. The ejected photo-electron enters a constant magnetic field of 2 mT making an angle…
A metal surface is illuminated by a radiation of wavelength $\displaystyle 4500 \AA$. The ejected photo-electron enters a constant magnetic field of $\displaystyle 2$ mT making an angle of $\displaystyle 90$°with the magnetic field. If it starts revolving in a circular path of radius $\displaystyle 2$ mm, the work function of the metal is approximately :
Official answer
(1)
1.$\displaystyle 36$ eV
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JEE Main 2022 Physics question, with the answer from NTA’s final answer key. Where our answers come from.