The S.I. unit of pole strength is

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A-m^-1

A-m^-2

A-m

A-m²

answer is B.

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Detailed Solution

Explanation: Pole strength is a measure of the magnetic strength of a magnetic pole, and its SI unit is ampere-meter (A·m). It is calculated as the product of the magnetic pole strength and the distance between the poles. The unit A·m represents the strength of the magnetic field produced by a magnetic dipole.

The correct answer is b) A-m.

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