Question

32. a. What is quality factor Q? Express it in terms of L, C and R. What does it signify?
[5]
b. Why should the quality factor have high value in receiving circuits? Name the
factors on which it depends.
C. A series LCR circuit is connected to an a.c. source of 220V, 50Hz. If the readings of
voltmeters across resistor, capacitor and inductor are 65 V, 415 V and 204 V and R =
10022. Calculate (i) current in the circuit (ii) value of L, and (iii) capacitance required to
produce resonance with the given inductor L.

Answer 1

Answer:

, the quality factor or Q factor is a dimensionless parameter that describes how underdamped an oscillator or resonator is. It is approximately defined as the ratio of the initial energy stored in the resonator to the energy lost in one radian of the cycle of oscillation.