The magnetic moment of a rectangular loop that carries 6 A and has dimensions are 0.04 m × 0.08 m is 12 Am2. How many turns are present?

The number of turns present in the loop are 625 turns.

Explanation:

Given;

current on the rectangular loop, I = 6A

Dimension of the rectangular loop, L x B = 0.04 m × 0.08 m

Magnetic moment of the loop, Pm = 12 Am²

Area of the rectangular loop, A =  L x B = 0.04 m × 0.08 m = 0.0032 m²

The magnetic moment of plane carrying coil/loop is given as;

Pm = NIA

Where;

N is the number of turns

A is the area of the loop

I is the current on the loop

Therefore, the number of turns present in the loop are 625 turns.

the answer is b ) square root of 5