Published by:
CGP EDU Academic Team
Published on: August 22, 2026
Photons of wavelength 
falls on a metal surface. If ejected electrons with maximum K.E moves in magnetic field of 
in circular orbit of radius 
, then work function of metal surface is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
From photoelectric equation,
Where, hc 
Radius of charged particle moving in a magnetic field is given by
where, 
So, K. 
Substituting in (1),
i.e. 
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