Question -
Answer -
The range of frequency (╬╜) of aradio is 800 kHz to 1200 kHz.
Lower tuning frequency, ╬╜1┬а=800 kHz = 800 ├Ч 103┬аHz
Upper tuning frequency, ╬╜2┬а=1200 kHz = 1200├Ч 103┬аHz
Effective inductance ofcircuit┬аL┬а= 200 ╬╝H = 200 ├Ч 10тИТ6┬аH
Capacitanceof variable capacitor for ╬╜1┬аis given as:C1
Where,
╧Й1┬а= Angularfrequency for capacitor┬аC1
Capacitance of variable capacitorfor ╬╜2,
C2┬а
Where,
╧Й2┬а= Angularfrequency for capacitor┬аC2
Hence, the range of the variablecapacitor is from 88.04 pF┬аto 198.1┬аpF.