A photon of energy 
ejects a photoelectron from a metal surface whose work function is 
. If this electron enters into a uniform magnetic field of induction 
in a direction perpendicular to the field and describes a circular path of radius 
, then the radius 
is given by (in the usual notation)
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
From Einstein's equation,
Now, a charged particle placed in uniform magnetic field experiences a force,
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