A toroidal solenoid with an air core has an average radius of 15 cm , area of cross-section `12 "cm"
Channel: Doubtnut
Date: 2020-08-30

A toroidal solenoid with an air core has an average radius of 15 cm , area of cross-section `12 "cm"^(2)` and 1200 turns . Ignoring the field variation across the cross-section of the toroid the self-inductance of the toroid is