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. The magnitude of the induced electric field at point P at a distance r from the center of the circular region
1
is ZERO
2
decreases as \(\rm \frac{1}{r}\)
3
increases as r
4
decreases as \(\rm \frac{1}{r^2}\)
5
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