A closely wound solenoid of 800 turns and area of cross section 2.5 × 10^–4 m² carries a current of 3.0 A. Explain the sense in which the solenoid acts like a bar magnet. What is its associated magnetic moment?

Question

A closely wound solenoid of 800 turns and area of cross section 2.5 × 10^–4 m² carries a current of 3.0 A. Explain the sense in which the solenoid acts like a bar magnet. What is its associated magnetic moment?

Philoid · Accepted Answer

Given:

Number of turns, N = 800

Area of cross-section, A = 2.5 × 10^-4 m²

Current, I = 3A

The solenoid acts like a bar magnet because the magnetic axis of the solenoid is along its length, which is analogous to the magnetic axis of Bar magnet.

We know that,

Magnetic moment, M = N × I × A …(1)

Now putting the values in equation 1, we get

M = 800 × 3A × 2.5 × 10^-4m²

M = 0.6 JT^-1

A closely wound solenoid of 800 turns and area of cross section 2.5 × 10–4 m2 carries a current of 3.0 A. Explain the sense in which the solenoid acts like a bar magnet. What is its associated magnetic moment?

A closely wound solenoid of 800 turns and area of cross section 2.5 × 10^–4 m² carries a current of 3.0 A. Explain the sense in which the solenoid acts like a bar magnet. What is its associated magnetic moment?