Question

A magnetic field of B is produced in an air core toroid, if core is replaced by iron, whose
permeability is 300 times the permeability of air, the value of B
A. Decreases by 300 times
B. Increases by 300 times
C. Not change
D. Zero​

Answer 1

Answer:

B)Increases by 300 times.

Explanation:

The relative permeability will get increase when air is filled up by iron rod.