Three students, X, Y and Z performed an experiment for studying the variation of a.c. with…
Physics20255 marksShort answer
Three students, X, Y and Z performed an experiment for studying the variation of a.c. with frequency in a series LCR circuit and obtained the graphs as shown below. They all used an AC source of the same emf and inductance of the same value.
Resonance curves
(a)
Who used minimum resistance?
(b)
In which case will the quality Q factor be maximum?
(c)
What did the students conclude about the nature of impedance at resonant frequency ($f_0$)?
(d)
An ideal capacitor is connected across $220\text{ V}$, $50\text{ Hz}$, and $220\text{ V}$, $100\text{ Hz}$ supplies. Find the ratio of current flowing through it in the two cases.
