Exam 21: Alternating-Current Circuits

Use the following figure to answer the next question. -The diagram that correctly represents the phase relationship between the current through the resistor and the voltage across the inductor in a circuit containing an inductor L, a capacitor C, and a resistor R all connected in series is

A series RLC circuit is driven by a 1.0-kHz oscillator. The circuit parameters are V_rms = 12 V, L = 5.0 mH, C = 4.0 μF, and R = 10 Ω. Under steady-state conditions, the rms potential difference across the capacitor will be

A series RLC circuit is driven by a 1.0-kHz oscillator. The circuit parameters are L = 5.0 mH, C = 4.0 μF, R = 10 Ω. What is the resonance frequency of the circuit?

The main power panel of a modern home is typically rated at 200 A at 120 V. The number of 60 W lightbulbs that can be on at the same time is

You connect a 100-Ω resistor, a 800-mH inductor, and a 10.0-μF capacitor in series across a 60.0-Hz, 120-V peak) source. In this circuit,

If you double the peak voltage in an AC circuit, the rms voltage

The reactance ) of an inductor is 10 Ω at 1 kHz. The inductance of this inductor is

A 200-turn coil rotates in a magnetic field of magnitude 0.25 T at a frequency of 60 Hz. The area of the coil is 5.0 cm². What is the maximum EMF in the coil?

An AC generator supplies 22 rms volts to a 30-Ω resistor at 50 Hz. What is the maximum current in the resistor?

Which of the following statements about an inductor that is connected to an AC voltage is true?

A heater is plugged into the same 120-V AC outlet as an 800-W hair dryer. If the total rms current drawn is 16.7 A, then calculate the power rating of the heater.

If you connect a 12-V rms AC power supply that operates at 5.0 kHz to a 20-μF capacitor, what is the rms current in the circuit neglect any resistance)?

The SI units of inductance times capacitance are

The figure shows the voltage and current for a device. The average power consumed by the device is

A series RLC circuit is driven by a 1.0-kHz oscillator. The circuit parameters are L = 5.0 mH, C = 4.0 μF, R = 10 Ω. What is the impedance of this circuit?

The battery has a voltage V = 6 V, the inductance of the inductor L = 12 mH and the capacitance of the capacitor C = 8 mF. Assume that the inductor and the wires have zero resistance.The switch S was at position a for a long time when it is switched to b. Describe the current flow in the right loop.

Electronic devices use electrical energy even when they are on standby. Calculate the percent of energy used per day for the following entertainment equipment in the standby mode assuming that they are plugged in all the time.