Question

A Solenoid has 2.0 into 10 ki power 3 term per metre if we wish to obtain a magnetic field at 8.0 into 10 ki power minus for Tesla what should be the value of current in the solenoid​

Answer 1

Given:

The force per unit area is B= 2×10³

The magnetic field B=8×10⁻²

Given:

The  current flowing through the solenoid.

Solution:

The formula for the force per unit are is

F= B.I

Putting above values

2×10³=8×10⁻²×I

0.25×10⁵=I

I=25×10³

So the current flowing through circuit is 25×10³ A