Choose the incorrect stateement about relative magnetic permeability:

Options

A. It is a dimensionless pure ratio
B. For vacuum medium its value is one
C. For ferromagnetic materials `mu_(r)gt gt1`
D. For paramagnetic materials `mu_(r)gt1`

Answer

D

Explanation

Relative magnetic permeability
`mu_(r)=("magnetic permeability of material" (mu))/("permeability of free space "(mu_(0)))`
it is dimensions pure ratio for paramagnetic materials `mu_(r)gt1`.