Question

Derive an expression for motional emf electromotive force​

Answer 1

Answer:

• An emf induced by motion relative to a magnetic field is called a motional emf. This is represented by the equation emf = LvB, where L is length of the object moving at speed v relative to the strength of the magnetic field B.

Explanation:

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Answer 2

Explanation:

• 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.

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