define quality factor in an A.C. circuit.why should the quality factor have high value in recieving circuits? name the factors on which it depends?

Asked by jaspreet singh | 27th Feb, 2011, 02:46: AM

Expert Answer:

Dear studnent,
 quality factor or Q factor is a dimensionless parameter that describes how underdamped an oscillator or resonator is.Higher Q indicates a lower rate of energy loss relative to the stored energy of the oscillator; the oscillations die out more slowly.A pendulum suspended from a high-quality bearing, oscillating in air, has a high Q, while a pendulum immersed in oil has a low one. 
For the receiving circuits, the sensitivity must be high. So, the Q factor must be high.
The Q factor (quality factor) of a resonator is a measure of the strength of the damping of its oscillations, or for the relative linewidth.
The Q factor of a resonator depends on the optical frequency ν0, the fractional power loss lper round trip, and the round-trip time Trt:
Hope this helps.

Answered by  | 27th Feb, 2011, 06:50: AM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.