The radiation corresponding to 
transition of a hydrogen atom falls on a gold surface to generate photoelectrons. These electrons are passed through a magnetic field of 
. Assume that the radius of the largest circular path followed by these electrons is 7mm, the work function of the metal is:(Mass of electron = 9.1 x 10 -31 kg)
Text Solution
Verified by ExpertsThe correct answer is:
D
3 → 2 ⇒ 1.89eV
5 × 10 −4 T r = 7 mm
= 1.077eV
We know work function = energy incident 
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