A toroid has a core of inner radius `20cm` and outer radius `22cm` around which `4200`
Channel: Doubtnut
Date: 2020-08-02

A toroid has a core of inner radius `20cm` and outer radius `22cm` around which `4200` turns of a wire are wound. If the current in the wire is `10A`, what is the magnetic field  (a) inside the core of toroid (b) outside the toroid  (c) in the empty space surrounded by toroid?