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The radiation corresponding to 3 rarr 2 ...

The radiation corresponding to `3 rarr 2` transition of a hydrogen atom falls on a gold surface to generate photoelectrons. These electrons are passed through a magnetic field of `5 xx 10^(–4)` T. Assume that the radius of the largest circular path followed by these electrons is 7 mm, the work function of the metal is :
(Mass of electron `=9.1xx10^(-31) kg`)

A

1.36 eV

B

1.88 eV

C

0.16 eV

D

0.82 eV

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