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MHT CET202311 May 2023Evening ShiftPhysicsCurrent ElectricityActual

An electron of mass ' m ' and charge ' q ' is accelerated from rest in a uniform electric field of strength ' E '. The velocity acquired by the electron, when it travels a distance ' L ', is

Options

  1. A2 q E mL
  2. B2 qEL m
  3. C2 Em qL
  4. DqE mL

Correct answer

B. 2 qEL m

Step-by-step solution

We know F = ma and F = qE q E=m a qE m = a According to equation of motion, aligned & v^2-u^2=2 a L & v^2-0^2=2 a L & v^2=2 a L & v= 2 a L & v= 2 q E L m aligned

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