Question

A rectangular coil of length 8cm and breadth 5cm has 200 turns of insulated wire. Find the magnetic moment of the coil, when a current of 2a flow through it.

Answer 1

Answer: The magnetic moment is $1.6 Am^2$

Explanation:

Given that,

Length l = 8 cm

Breadth b = 5 cm

Number of turns N = 200

Current I = 2 A

We know that,

The magnetic moment is the product of current, area and number of turns.

$m = NIA$

$m = 200\times2\times40\times10^{-4}$

$m = 1.6 Am^2$

Hence, The magnetic moment is $1.6 Am^2$

Answer 2

Explanation:

Answer: The magnetic moment is 1.6 Am^21.6Am

2

Explanation:

Given that,

Length l = 8 cm

Breadth b = 5 cm

Number of turns N = 200

Current I = 2 A

We know that,

The magnetic moment is the product of current, area and number of turns.

m = NIAm=NIA

m = 200\times2\times40\times10^{-4}m=200×2×40×10

−4

m = 1.6 Am^2m=1.6Am

2

Hence, The magnetic moment is 1.6 Am^21.6Am

2