Question

1. Magnetic pole strength of a short magnetic dipole of length 4 cm and magnetic moment 1
Am” is ......
0.125 Am b)2.5 Am c) 0.025Am d)1.25Am
​

Answer 1

The magnetic pole strength of a short is 1.25 Am.

(d) is correct option.

Explanation:

Given that,

Magnetic dipole of length = 4 cm

Magnetic moment = 0.1 Am²

We need to calculate the magnetic pole strength of a short

Using formula of magnetic dipole

$M = m\times 2l$

$m=\dfrac{M}{2l}$

Where, M = magnetic dipole

m = pole strength

2l = dipole length

Put the value into the formula

$m=\dfrac{0.1\times100}{8}$

[tex[m=1.25\ Am[/tex]

Hence, The magnetic pole strength of a short is 1.25 Am.

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Topic : magnetic dipole

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