The core of a toroid having 3000 turns has inner and outer radii of 16 cm and 17 cm respectively .
Channel: Doubtnut
Date: 2020-03-29

The core of a toroid having 3000 turns has inner and outer radii of 16 cm and 17 cm respectively . The magnetic field in the core for a current of `0.07` A is 2.5 T . What is relative permeability of the core ?