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JEE Main 2022 Physics question

PhysicsMoving Charges and MagnetismJEE Main 2022

A velocity selector consists of electric field and magnetic field with B = 12 mT. The value of E required for an electron of energy 728 eV moving along the positive x-axis to pass undeflected is (Given, mass of electron = kg)

Answer: (1)

Solution

The electron passes undeflected when v = E/B, and . So \sqrt{2K/m}10^{-3}\sqrt${(2

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Question ID VK-025030