An antenna has an impedance of 50 Q. An unmodulated AM signal produces a current of 4.8 A. The modulation is 90 percent. * Sidebands power is
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- An LRC circuit contains a 700-Ω resistor, a 7.00-Hcoil, and an unknown capacitor. The circuit resonates at1000 Hz. What is the value of the capacitance ?? The resonant frequency of an LRC circuit is 425 Hz.If the resistance is 300 Ω and the capacitance is 200 nF, what is the value of the inductance ??What capacitance is needed in a series with an 750-µH inductor to form a circuit that radiates a wavelength of 255 m? pFIn an RLC circuit a second capacitor is addedin series to the capacitor already present. (a) Does the resonancefrequency increase, decrease, or stay the same? (b) Choose the bestexplanation from among the following:I. The resonance frequency stays the same because it dependsonly on the resistance in the circuit.II. Adding a capacitor in series increases the equivalent capacitance, and this decreases the resonance frequency.III. Adding a capacitor in series decreases the equivalent capacitance, and this increases the resonance frequency.