1.

A circular wire of radius r rotates r about its own axis with angular speed  w in a magnetic  field  B perpendicular to its plane , then the induced emf is zero  why and how????

Answer»

|E| = |ΦB|/ t

Where E is induced emf and ΦB = BA cos α
Here B is magnetic field and A is area and α is the angle between circular wire plane and magnetic field.

Here α = 90°
So induced emf = 0 as cos
α = 0



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