An electron moves in a circular orbit with a uniform speed

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An electron moves in a circular orbit with a uniform speed v. It produces a magnetic field B at the centre of the circle. The radius of the circle is proportional to

1. √B/v
2. B/v
3. √v/B
4. V/B

Correct Option: D

r =	mv	⇒ r ∝	v
	qB		B