# A long straight circular conductor placed in air is carrying a current of 250 A. Find the magnetizing force at a distance of 5 cm from the conductor.

A long straight circular conductor placed in air is carrying a current of 250 A. Find the magnetizing force at a distance of 5 cm from the conductor.

### Right Answer is:

2500/π µ AT/m

#### SOLUTION

**Given:**

r = 5 cm = 5 × 10^{-2} m

I = 250 A

Magnetizing field strength (H) is given by

H = I/2πr AT/m

Where

H = Magnetizing force (AT/m)

I = Current flowing in a conductor (A)

r = Distance between current-carrying conductor and the point (m)

H = 250/2π × 5 × 10^{-2} m

**H = 2500/π µ AT/m**