Materials and Components

Assertion (A): For a magnetic material M = (μ_r - 1) H, where M is magnetic dipole moment/m³, H is field intensity A/m and μ_r is relative permeability. Reason (R): μ_r can have any value from 0 to hundreds of thousands.

A Both A and R are true and R is correct explanation of A

B Both A and R are true but R is not correct explanation of A

C A is true but R is false

D A is false but R is true

ANS:C - A is true but R is false

μ_r is always more than 1. It cannot be 0 or less than 1.

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