Embibe Experts Solutions for Chapter: Alternating Current, Exercise 1: Haryana Board-2020

The voltage across the end of a resistor is ${\mathrm{V}}_0\sin \mathrm{\omega t}$ . The r.m.s. value of this voltage is 

A series LCR circuit with $R=20 \mathrm{\Omega }, \mathrm{L}=5\mathrm{H} , \mathrm{and} \mathrm{C}=80 \mathrm{\mu F}$ is connected to a variable frequency $220 \mathrm{Hz}$ supply,.

(a) What is the angular frequency ${\omega }_0$ of the source at which resonance occurs?

A series LCR circuit with $\mathrm{R}=20 \mathrm{\Omega }, \mathrm{L}=5\mathrm{H} , \mathrm{and} \mathrm{C}=80 \mathrm{\mu F}$ is connected to a variable frequency $220 \mathrm{ac}$ supply,.

 Calculate the impedance and the current at resonance condition.

The power factor of a pure capacitive circuit is:

A series L-C-R circuit with $\mathrm{R}=44\mathrm{\Omega },\mathrm{C}=8\mathrm{\mu F} \mathrm{and} \mathrm{L}=50 \mathrm{H}$ is connected to a variable frequency $220\mathrm{V}$ a.c. supply. Calculate angular frequency, impedance and current at resonance condition

The phase difference between voltage and current when an ac source is connected to an inductor. :

What is Transformer? Draw its labelled diagram.

A series L-C-R circuit with $\mathrm{R}=60\mathrm{\Omega } ,\mathrm{L}=80 \mathrm{H} \mathrm{and} \mathrm{C}=5\mathrm{\mu F}$ is connected to a variable frequency$240 \mathrm{V}$ supply. Calculate angular frequency, impedance and current at resonance condition.