Question

In series LCR circuit at resonance ,the applied emf and current are,​

Answer 1

Explanation:

Resonance occures in a series LCR circuit when the frequency of the applied emf is 1000 Hz. if the value of C is double, resonance occurs at f=2000Hz. Solution : (f=900Hz)<(fres=1000Hz),so(XC)>(XL), circuit becomes capacitive and current leads emf...

Answer 2

Answer:

when frequency = 900Hz then the current through the voltage source will be ahead of emf of the source

the impedance of the circuit is minimum at

at only resonance the voltages across L and C differ in phase by

if the value of C is double, resonance occurs at

.

Answer :

A::B

Solution :

, circuit becomes capacitive and current leads emf. <br> At resistance, impedance is minimum. <br> Not only at resonance, but at all conditions voltage across L and C differs in phases by

when connected in series.