A radiation of 3.8 {eV} falls on a metal surface to produce photo electrons. These electrons are made to enter a magnetic field of 2 \times 10^{-4} {T}. If the radius of the largest circular path followed by these electrons is 30 {mm}, then the work function of the metal is (Mass of electron {m}_{ {e}}=9 \times 10^{-31} {kg} )

AP EAPCET 06-Jul-2022 Shift 1 Paper

Section: Physics

Question : 116 of 160

Marks: +1, -0

A radiation of 3.8eV falls on a metal surface to produce photo electrons. These electrons are made to enter a magnetic field of 2×10−4T. If the radius of the largest circular path followed by these electrons is 30mm, then the work function of the metal is
(Mass of electron me=9×10−31kg )

0.9eV
1.0eV
0.6eV
1.2eV

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