Question

in SI system, permeability has the unit: (a) Weber metre-¹ ampere-¹ (b) Weber metre ampere-¹ (c) Weber metre-¹ampere-² (d) Weber metre ampere ​

Answer 1

option a is correct

sol:

magnetic flux = B.A

B= magnetic field

A=area

hence,

we get units of B as werber metre^-2

then use amphres critical loop law

I.e

integral of B.dl = mewnot i in

where

i =current

dl is change in length.

hence we get

answer a is corre5