Alternating Current

Question: An alternating e.m.f. of frequency $v\,\left( { = \frac{1}{{2\pi \sqrt {LC} }}} \right)$ is applied to a series LCR circuit. For this frequency of the applied e.m.f.

1) The circuit is at resonance and its impedance is made up only of a reactive part

2) The current in the circuit is in phase with the applied e.m.f. and the voltage across R equals this applied emf

3) The sum of the p.d.’s across the inductance and capacitance equals the applied e.m.f. which is ${180^o}$ ahead of phase of the current in the circuit

4) The quality factor of the circuit is $\omega L/R$ or $1/\omega CR$ and this is a measure of the voltage magnification (produced by the circuit at resonance) as well as the sharpness of resonance of the circuit

Solution:

Explanation: No Explanation

AC circuits

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Alternating Current

Question: An alternating e.m.f. of frequency $v\,\left( { = \frac{1}{{2\pi \sqrt {LC} }}} \right)$ is applied to a series LCR circuit. For this frequency of the applied e.m.f.

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