Moving Charges and Magnetism

Question: The magnetic induction at the centre of a current carrying circular of coil radius r, is



1) Directly proportional to $r$
2) Inversely proportional $r$
3) Directly proportional to $r^2$
4) Inversely proportional to $r^2$
Solution: Explanation: No Explanation
Biot-Savart's Law Amperes Law

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