. The work function of the metal is close to


The radiation corresponding to 3 → 2 transition of hydrogen atom falls on a metal surface to produce photoelectrons. These electrons are made to enter a magnetic field of 3 × 10–4T. If the radius of the largest circular path followed by these electrons is 10.0 mm

A. 0.8 eV

B. 1.6 eV

C. 1.8 eV

D. 1.1 eV

Best Answer

Ans: D

Sol: Given that the photoelectrons move into the circular path in the magnetic field. So necessary centripetal force is provided by the magnetic force on the electron

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