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A bar magnet with poles 25 cm apart has a pole strength of 14.4 A-m. What is the magnetic dipole moment of the bar magnet?

A bar magnet with poles 25 cm apart has a pole strength of 14.4 A-m. What is the magnetic dipole moment of the bar magnet? Correct Answer <span style="color: rgb(32, 33, 36);">3.6</span>

CONCEPT: 

  • Magnetic Dipole Moment: For a bar magnet, it is described as the product of pole strength and the distance between the two poles.

m = pl

where m is the magnetic Dipole moment, p is the pole strength, and l is the distance between the two poles.​

CALCULATION:

Given that p = 14.4 Am; l = 25 cm = 0.25 m;

m = pl

m = 14.4 × 0.25 = 3.6 Am2

So the correct answer is option 4.

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