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Question

Why induced emf is called motional emf?


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Solution

Explanation:

  1. The emf which is induced by motion relative to a magnetic field is called a motional emf.
  2. Devices that work on motional emf are based on the generation of emf due to a moving conductor within a stationary magnetic field
  3. This is represented by the equation

Motional emf=LvB, where L= length of the object, v=speed of the object. B= strength of the magnetic field

Hence, motional emf is the emf that is induced by the motion of any object which is why an induced emf is called motional emf.


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