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CGP EDU Academic Team
Published on: September 13, 2026
A light beam of wavelength 500nm is incident on a metal having work function of 1.25eV, placed in a magnetic field of intensity B. The electrons emitted perpendicular to the magnetic field B, with maximum kinetic energy are bent into circular arc of radius 30cm. The value of B is x10 -7 T Given 
, mass of electron 
Text Solution
Verified by ExpertsThe correct answer is:
125
(125)
By photoelectric equation
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