Question: A variable capacitor with a range from 10 to 365 pF is used with a coil to form a variable frequency LC circuit to tune

A variable capacitor with a range from 10 to 365 pF is used with a coil to form a variable frequency LC circuit to tune the input to a radio.

(a) What is the ratio of maximum frequency to minimum frequency that can be obtained with such a capacitor? If this circuit is to obtain frequencies from 0.54MHz to 1.60MHz, the ratio computed in (a) is too large. By adding a capacitor in parallel to the variable capacitor, this range can be adjusted. To obtain the desired frequency range,

(b) What capacitance should be added and

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