Embibe Experts Solutions for Chapter: Alternating Current, Exercise 1: Meghalaya-2018

The equation of an alternating current is $I=50 \sin 100 t$. Find the frequency.

Find the root mean square value of current through a capacitor of capacitance $10 \mathrm{\mu F}$, when connected to an a.c. source of $110 \mathrm{volts}$ at $50 \mathrm{cycles}/\sec$ supply. What is its reactance?

Obtain an expression for the average power of an a.c. circuit.

A step-up transformer operates on a $230 \mathrm{V}$ line and supplies current of $2 \mathrm{A}$ to a load. The ratio of the primary and secondary windings is $1:25$. The current in the primary coil is

Write down the condition of resonance in series L-C-R circuit and hence find an expression for the resonant frequency.

With the help of a phasor diagram, find an expression for impedance $\left(Z\right)$ in a series $L-C-R$ circuit.

What is the inductive reactance? Shows how the purely inductive circuit offers zero resistance to direct current.

Describe the principle and working of a transformer.