Question

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What's motional emf?

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Answer 1

Answer:

• Motional EMF

An emf induced by the motion of the conductor across the magnetic field is a motional electromotive force. The equation is given by E = -vLB. This equation is true as long as the velocity, field, and length are mutually perpendicular. The minus sign associated with the Lenz's law.

Answer 2

• 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.
• Whenever a conducting rod is moving in a magnetic field, either showing translator motion (or) rotatory motions as a result a P.D is established at the ends of the rod.
• An electric field appears along with the length of the rod directed from the high potential end to the low potential one. This EMF is called Motional EMF.