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JEE Main Physics Class 12 Electromagnetic Induction Questions

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Question : 42

Total: 120

A velocity selector consists of electric field

and magnetic field

with B=12mT. The value of E required for an electron of energy 728eV moving along the positive x-axis to pass undeflected is :
(Given, mass of electron =9.1×10−31‌kg )

[26-Jul-2022-Shift-2]

192kVm−1
192mVm−1
9600kVm−1
16kVm−1

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