Categories > Moving Charges and Magnetism > Biot-Savart's Law > A length L of wire carries a steady current I. It is bent first to form a circular plane coil of one turn. The same length is now bent more sharply to give a double loop of smaller radius. The magnetic field at the centre caused by the same current is

Moving Charges and Magnetism

Question: A length L of wire carries a steady current I. It is bent first to form a circular plane coil of one turn. The same length is now bent more sharply to give a double loop of smaller radius. The magnetic field at the centre caused by the same current is


1) A quarter of its first value
2) Unaltered
3) Four times of its first value
4) A half of its first value
Solution: Explanation: No Explanation
Biot-Savart's Law Amperes Law

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