A long solenoid of `N` turns has a self-induced `L` and area of cross-section A. When a current `
Channel: Doubtnut
Date: 02/11/2021

A long solenoid of `N` turns has a self-induced `L` and area of cross-section A. When a current `i` flows through the solenoid, magnetic field inside it has magnitude `B` . The current `i` is equal to