The output voltage of an AC generator is given by Av = (150 V)sin(40nt). The generator is connected across a 25.0-n resistor. (a) By inspection, what is the maximum voltage? V (b) By inspection, what is the frequency? Hz (c) Find the rms voltage across the resistor.
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- a) The peak voltage of an ac supply is 300V. What is the rms voltage?A LRC series circuit consists of a 1.50 µF capacitor, a 6.00 mH inductor, and a 71.0 N resistor that are connected across an AC voltage supply with maximum voltage of Vmax = 13.0 V. (a) What must be the frequency of the AC voltage supply for the average power delivered to the circuit to be Vrms!rms?A resistor and capacitor are connected in series across an ac generator. The emf of the generator is given by v(t)=V0cosωt, where V0=120V, ω=120πrad/s, R=400Ω, and C=4.0μF. (a) What is the impedance of the circuit? (b) What is the amplitude of the current through the resistor? (c) Write an expression for the current through the resistor. (d) Write expressions representing the voltages across the resistor and across the capacitor.
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- A capacitor is connected across the terminals of an ac generator that has a frequency of 360 Hz and supplies a voltage of 34 V. When a second capacitor is connected in parallel with the first one, the current from the generator increases by 0.30 A. Find the capacitance of the second capacitor. Note: The ac current and voltage are rms values and power is an average value unless indicated otherwise.A resistor and capacitor are connected in series across an ac generator. The voltage of the generator is given by V(t) = Vo cos(wt), where Vo What is the magnitude of the impedance of the RC circuit? (b) What is the amplitude of the current through the resistor? (c) What is the phase difference between the voltage and current? 120 V, w = 120T rad/s, R = 600N, and C = 4.5µF. (a) Hint a. The magnitude of the impedance is Ω. b. The amplitude of the current through the resistor is mA. c. The phase difference between the voltage and current is rad. (Take the positive phase difference to mean that voltage is leading the current by this phase difference.)In the circuit shown in the figure, the 60-Hz ac source has a voltage amplitude of 120 V, the capacitive reactance is 920 Ohms, the inductive reactance is 290 Ohms, and the resistance is 420 Ohms. What is the rms current in the circuit?