infinite wire is bent into a simicircule shown on the right with Pwhen the current in...

Question

Question

Answer 1

Answer #1

We need to find the magnetic moment which is given as,

M=NIA

Where, N= Number of turns.

I= Current in the coil.

A= Area of the coil,which is a circle.

Now try to understand,

When the wire of length L is bent in the form of the circle, the perimeter of the circle will be L.

So, 2πr=L

⇒r=L/2π

So, you can find the area now which is,

A=πr²=π×L² /4π²=L/4π

Here N=1

So magnetic moment has a magnitude of,

Direction :-

Suppose the coil is on the plane of the paper.

If the direction of current is clockwise then according to right hand thumb rule magnetic moment will be

Answer 2

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