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A uniform but time varying magnetic field B(t) exists in a circular region of radius a and is directed into the plane of the paper as shown in the figure. The magnitude of the induced electric field at point P at a distance r from the centre of the circular region
A uniform but time varying magnetic field B(t) exists in a circular region of radius a and is directed into the plane of the paper as shown in the figure. The magnitude of the induced electric field at point P at a distance r from the centre of the circular region
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A time varying magnetic field produces an induced electric field.
rnE.* (2 pi r ) = (pi*a*a) dB/dt
rnE =( a*a /2r)(dB/dt)
rnso, E decreases as 1/r