Question

how does the strength of magnetic field at the centre of a circular coil of wire depend on :
1) the radius of the coil
2) the number of turns of wire in the coil
3) the straight of the current flowing in the coil​

Answer 1

The magnetic field strength varies directly with the number of turns of wire. It increases as the number of turns increases. Answer: The magnetic field at the centre of a circular coil of a wire is inversely proportional to the radius of the coil whereas Directly proportional to the number of turns of wire in the coil

Answer 2

The strength of magnetic field at the centre of a circular coil of wire depend upon (2) The number of turns of wire in the coil.