In a black box of unknown elements (L or R or any other combination), an ac voltage `
Channel: Doubtnut
Date: 26/07/2020

In a black box of unknown elements (L or R or any other combination), an ac voltage `E=E_(0) sin (omegat)+phi)` is applied and current in the circuit was found to be `I=(I_0) sin [ omega t + phi + (pi//4)]`. Then the unknown elements in the box may be