Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 12-science Answered

What is Q- factor? what defines its sharpness? what are the uses of it?
Asked by Akash Choudhary | 19 Feb, 2012, 10:36: PM
answered-by-expert Expert Answer

Resonant circuits are used to respond selectively to signals of a given frequency while discriminating against signals of different frequencies. If the response of the circuit is more narrowly peaked around the chosen frequency, we say that the circuit has higher "selectivity". A "quality factor" Q, is a measure of that selectivity, and we speak of a circuit having a "high Q" if it is more narrowly selective.

An example of the application of resonant circuits is the selection of AM radio stations by the radio receiver. The selectivity of the tuning must be high enough to discriminate strongly against stations above and below in carrier frequency, but not so high as to discriminate against the "sidebands" created by the imposition of the signal by amplitude modulation.

The selectivity of a circuit is dependent upon the amount of resistance in the circuit. 

The Q is a commonly used parameter in electronics, with values usually in the range of Q=10 to 100 for circuit applications.

Answered by | 20 Feb, 2012, 01:05: PM
CBSE 12-science - Physics
Asked by akhilverma471001 | 27 Dec, 2022, 10:14: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
Asked by arjunsah797 | 27 Mar, 2022, 08:00: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
Asked by saivardhanreddy15022003 | 11 Mar, 2022, 06:47: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
Asked by sky11841 | 08 Sep, 2021, 10:04: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
Asked by mohitverma1017sn | 30 Dec, 2020, 08:57: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
Asked by rishicool0205 | 19 Aug, 2020, 02:20: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
Get Latest Study Material for Academic year 24-25 Click here
×