Magnetism And Matter Ques 20
20. Current is flowing in a coil of area $A$ and number of turns $N$, then magnetic moment of the coil, $M$ is
[2001]
(a) $NiA$
(b) $\frac{N i}{A}$
(c) $\frac{N i}{\sqrt{A}}$
(d) $N^{2} A i$
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Answer:
Correct Answer: 20.(a)
Solution:
- (a) Magnetic moment linked with one turn $=i A$ Magnetic moment linked with,
$N$ turns $=i N A $ $amp-m^{2}$. Here, $A=$ Area of current loop.
BETA
