Question

If number of turns, area and current through a coil are given by $n,A$ and I respectively, then its magnetic moment is given by _______.

• A. $n^{2}IA$
• B. $nIA$
• C. $nI{A}^2$
• D. $\frac{nI}{\sqrt{A}}$

Answer 1

The correct option is B $nIA$

Given: no.of turns =n ,Area=A, Current=I

Solution : here is the direct formula M=NIA

Hence the correct option is B