Question

How does the strength of the magnetic field produced by a current-carrying circular coil depend on the number of turns in the coil?

Answer 1

Step 1: Magnetic field due to a current-carrying coil,
It is known that the current direction remains the same for every turn of the circular coil. The magnetic fields for each turn will be added to produce a net effect. Magnetic field strength is higher (maximum) at the center of the coil, and then it starts decreasing away from the center.

Step 2: Formula of the magnetic field strength,

The magnetic field strength can be given as,

$H=\frac{I\times N}{L}$

Here, I is the current flowing through the circular coil, L is the coil's length, N is the number of coils turns, H is the magnetic field strength.

Thus, from the above, it can be concluded that the strength of the magnetic field depends on the number of turns in the coil.