# Question: A Radio l ming Circuit The minimum capacitance of a variable

A Radio 'l\ming Circuit. The minimum capacitance of a variable capacitor in a radio is 4.18 pF.

(a) What is the inductance of a coil connected ro this capacitor if the oscillation frequency of the L-C circuit is 1600 X l03 Hz, corresponding ro one end of the AM radio broadcast band. when the capacitor is set ro its minimum capacitance?

(b) The frequency at the other end of the broadcast band is 540 X l03 Hz. What is the maximum capacitance of the capacitor if the oscillation frequency is adjustable over the range of the broadcast band?

(a) What is the inductance of a coil connected ro this capacitor if the oscillation frequency of the L-C circuit is 1600 X l03 Hz, corresponding ro one end of the AM radio broadcast band. when the capacitor is set ro its minimum capacitance?

(b) The frequency at the other end of the broadcast band is 540 X l03 Hz. What is the maximum capacitance of the capacitor if the oscillation frequency is adjustable over the range of the broadcast band?

## Answer to relevant Questions

An L-C circuit containing an 80.0-mH inductor and a 1.25-nF capacitor oscillates with a maximum current of 0.750 A. Calculate: (a) The maximum charge on the capacitor and (b) The oscillation frequency of the circuit. (c) ...For the circuit of Fig. 30.17, let C = 15.0 nF L = 22 mH and R = 75.0 Ω (a) Calculate the oscillation freque~y of the circuit once the capacitor bas been charged and the switch bas been connected to point a (b) How ...A Differenliatlng Circuit. The current in a resistanceless inductor is caused to vary with time as shown in the graph of Fig. 30.19. (a) Sketch the pattern that would be observed on the screen of an oscilloscope connected to ...Continuation of Exercises 30.111 and 30.27. (a) How much energy is stored in the magnetic field of the inductor one time constant after the battery has been connected? Compute this both hy integrating the expression in ...In the circuit shown in Fig. 30.22, find the reading in each ammeter and voltmeter(a) just after switch S is closed and (b) after S has been closed a vel)' longtime.Post your question