Question

The permeability of a metal is 0.01256 TmA^{- 1}  What is its relative permeability?

Options

• `10^4`

• `10^5`

• `2 xx 10^6`

• `3 xx 10^5`

Answer 1

`10^4`

Explanation:

Relative permeability,

`µ_"R" = µ/µ_0 = 0.01256/ (4pi xx 10^-7`

`= 0.01256/ (4 xx 3.14 xx 10^-7) = (1256 xx 10^-5)/ (12.56 xx 10^-7) = 10^4`