A photon of energy 'E' ejects photoelectrons from a metal surface whose work function is W. If this electron enters into uniform magnetic field of induction 'B' in a direction perpendicular to field and describes a circular path of radius 'r', then radius is given by: [MHT-CET 2022]

Question:

A photon of energy ‘E’ ejects photoelectrons from a metal surface whose work function is W. If this electron enters into uniform magnetic field of induction ‘B’ in a direction perpendicular to field and describes a circular path of radius ‘r’, then radius is given by: [MHT-CET 2022]

Options :

(a) √2e(E-W0)/mB
(b) √2m(E-W0)/eB
(c) √2m(E-W0)/eB
(d) √2m(E-W0)eB

Answer :

(b) √2m(E-W0)/eB

Answer Steps :

step 1:

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