Q117 / 150 · MHT CET 2023 (12 May Shift 1) · Physics

The magnetic moment of a current (I) carrying circular coil of radius ' $r$ ' and number of turns ' $n$ ' depends on

A
n only
B
I only
C
$r$ only
Correct answer
D
n, I and r

Solution

$\begin{aligned} & \mathrm{m}=\mathrm{nI} A \\ & \mathrm{~m}=\mathrm{nl}\left(\pi \mathrm{r}^2\right)\end{aligned}$

Hence, the correct answer is option: 'D'.

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