Which of the following statement is true for relative magnetic permeability?

It is dimensionless

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It is unit less

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Its value is greater than 1000 for iron

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All of the above

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Solution

The correct option is D All of the above
For any magnetic substance
$\frac{μ}{μ_{0}} = \frac{B}{B} = μ_{r} =$ relative magnetic permeability.
It is unitless and dimensiontess and its value is greater than 1000 for iron.

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