Question

A circular coil of 200 turns and of radius 20 cm carries a current of 5A .Calculate the magnetic induction at a point along its axis ,at a distance three times the radius of the coil from its center.

Answer 1

Answer:

Given:

n=200

a=20 cm=.2 m

I=5 A

x=3a

B=

2(a

2

+x

2

)

3/2

nμ

0

Ia

2

Substitution and simplification

B=9.9×10

−5

T