A) It is dimensionless
B) It is unit less
C) Its value is greater than 1000 tor iron
D) All of the above
Correct Answer: D
Solution :
For any magnetic substance \[\frac{\mu }{{{\mu }_{0}}}=\frac{B}{{{B}_{0}}}={{\mu }_{r}}=\]relative magnetic permeability. It is unitiess and dimensionless and its value is reater than 1000 for iron.
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