Embibe Experts Solutions for Chapter: Alternating Current, Exercise 2: BEGINNER'S BOX - 2

The figure given below shows the variation of an alternating emf with time. What is the average value of the emf for the shaded part of the graph? 

When a series combination of inductance and resistance are connected with a $10 \mathrm{V} 50 \mathrm{Hz} \mathrm{AC}$ source, a current of $1 \mathrm{A}$ flows in the circuit. The voltage leads the current by a phase angle of $\mathrm{\pi }/3$ radian. Calculate the values of resistance and inductance.

An inductance coil has a resistance of $100 \mathrm{ohm}$. When a.c. signal of frequency $1000\mathrm{}\mathrm{H}\mathrm{z}$ is applied to the coil, the applied voltage leads the current by $45°$. Calculate the self-inductance of the coil.