Physics · 2020
JEE Main · 9 January 2020, Shift 1 · Q18
Radiation, with wavelength 6561 falls on a metal surface to produce photoelectrons. The electrons are made to enter a uniform magnetic field of 3 ×…
Radiation, with wavelength $\displaystyle 6561 \AA$ falls on a metal surface to produce photoelectrons. The electrons are made to enter a uniform magnetic field of $\displaystyle 3 \times 10^{-4} \mathrm{~T}$. If the radius of the largest circular path followed by the electrons is $\displaystyle 10$ mm, the work function of the metal is close to :
Official answer
(2)
1.$\displaystyle 1$ eV
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