Question

why strength of magnetic field increases with increase in loops in current carrying circular loop?​

Answer 1

The magnetic field of each segment of wire in the loop, due to electrons moving in the wire, adds together inside the loop, thereby making the field become bunched-up.

Answer 2

Explanation:

Why is the magnetic field strength greater inside a current-carrying loop of wire than about a straight section of wire? The magnetic field of each segment of wire in the loop, due to electrons moving in the wire, adds together inside the loop, thereby making the field become bunched-up.