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

Mention one power loss in transformer.

Arrive at the expression for the impedance of a series LCR circuit using phasor diagram method and hence write the expression for the current through the circuit.

Mention the three types of energy loss in a transformer.

Derive an expression for the impedance of a series LCR circuit, when an AC voltage is applied to it.

A series LCR circuit contains a pure inductor of inductance $5.0 \mathrm{H}$, a capacitor of capacitance $20 \mu \mathrm{F}$ and a resistor of $40 \mathrm{\Omega }$. Calculate the Quality factor (Q-factor) of the circuit. 

If the peak value of a.c current is $4.24 \mathrm{A}$. What is its root-mean-square value?

A series LCR circuit contains a pure inductor of inductance $5.0 \mathrm{H}$, a capacitor of capacitance $20 \mathrm{\mu F}$ and a resistor of resistance $40 \mathrm{\Omega }$. Find the resonant frequency of the circuit.

A series LCR circuit contains a pure inductor of inductance $5.0 \mathrm{H}$, a capacitor of capacitance $20 \mu \mathrm{F}$ and a resistor of $40 \mathrm{\Omega }$.  What is the impedance at resonant condition?