Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Light emitted by hydrogen gas corresponding to transition from 
to 
incident on a metal plate. The electron emitted from metal plate with maximum kinetic energy enters a magnetic field 
perpendicularly. If the radius of path of electron is 7 
then find the work function of metal.
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Energy of photon emitted by Hydrogen atom is
Now we have equation for kinetic energy
If radius of electron 
Squaring both side
From eq (1),(2)and (3)
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