A tank circuit in a radio transmitter is a series RCL circuit connected to an an

Question

A tank circuit in a radio transmitter is a series RCL circuit connected to an antenna. The antenna broadcasts radio signals at the resonant frequency of the tank circuit. Suppose that a certain tank circuit in a shortwave radio transmitter has a fixed capacitance of 1.89  10-11 F and a variable inductance. The antenna is intended to broadcast radio signals ranging in frequency from 8 MHz to 12 MHz

(a) Find the minimum inductance of the tank circuit.
H

(b) Find the maximum inductance of the tank circuit.
H

I am pretty sure I have to use the equation F0=1/(2pi*sqrt(LC)) and I am using 8 MHz as F0 for part A and 1.89e-11 ad the C, but it keeps saying I'm wrong.  Can someone show me where I am going wrong and provide an explanation? thanks.

Explanation / Answer

a. the minimum inductance of the tank circuit. = 1/(f2.4?2.C)

in this case

f = 12 * 10^6 Hz

b. the maximum inductance of the tank circuit. = 1/(f2.4?2.C)

in this case

f = 8 * 10^6 Hz

Resst all values u know..

just substitute that u ll get the answer...

thank u

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