Question

derive an Expression for motional e.m.f??​

Answer 1

Explanation:

Deriving expression for motional emf

|F|=q|v×B|=qvBsinθ

We can describe a field: |M|=|F|q=|v×B|=vBsinθ

The work done by the non-electrostatic Lorentz force on unit of charge is: E=|M|L=L|v×B|=LvBsinθ

Answer 2

Answer:

Let a metal rod PQ of length l placed on it be moving towards left with a velocity towards left as shown in the figure. Let the distance of PQ from SR be x. This emf is induced in the rod because of the motion of the rod in the magnetic field. Therefore this emf is called motional emf

Explanation:

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