Question

A uniform conducting wire of length 18 a and resistance R is wound up as current carrying coil in the shape of a regular hexagon of sides a. If the coil is connected to a voltage source then the magnetic moment of coil is

• A.
• B.
• C.
• D.

Answer 1

Answer: (B)

Answer 2

In the regular hexagon, if each arm length is a, then the number of turns in the given shape

Now the area of given shape is

Now magnetic moment M = nIA