Question

Why is it that the magnetic field of a current-carrying coil having n turns, is ‘n’ times as large as that produced by a single turn (loop)?

Answer 1

The magnetic field produced by a single wire loop will have a definite direction and strength. If we increase the number of loops the magnetic field due to each loop will add. The magnetic field is directly proportional to the current in the wire loop, with each loop the current increases and so the magnetic field increases. Moreover, it will increase the density of magnetic field lines and so the magnetic field strength. Therefore, the magnetic field of a current-carrying coil having n turns is ‘n’ times as large as produced by a single loop.