Exam 29: Alternating-Current Circuits

A circuit contains a capacitor (C $\mu$ F),an inductor (L mH),and an ohmic resistor (R $\Omega$ )connected in series.If you change the potential across this series combination,the values that change (if you neglect thermal effects)are

Use the following figure for the next problem. The battery has a voltage V = 6 V, the inductance of the inductor L = 12 mH and the capacitance of the capacitor 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.

You connect a 100- $\Omega$ resistor,a 800-mH inductor,and a 10.0- $\mu$ F capacitor in series across a 60.0-Hz,120-V (peak)source.The impedance of your circuit is approximately

Use the following figure for the next problem. The battery has a voltage V = 6 V, the inductance of the inductor L = 12 mH and the capacitance of the capacitor 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.What is the charge on the capacitor at t = 0 s?

A transformer is used to change

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 $\mu$ F,and R = 10 $\Omega$ .Under steady-state conditions,the rms current in the circuit will be

You connect a 250- $\Omega$ resistor,a 1.20-mH inductor,and a 1.80- $\mu$ F capacitor in series across a 60.0-Hz,120-V (peak)source.When you connect a voltmeter across the capacitor in this circuit,the meter reads approximately

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

How much does the maximum EMF produced by a generator (a rotating coil)change if the number of turns of the coil is tripled?

At what frequency would the reactance of a 1.0-mH inductor be twice that of a 10- $\mu$ F capacitor?

Two heaters are plugged into the same 120-V AC outlet.If one heater is rated at 1100 W,then what can be the maximum rating of the second heater in order not to exceed the 20 A trip rating on the circuit?

Use the following figure for the next problem. -The figure shows the voltage and current for a device.The frequency of the voltage is

Use the following figure for the next problem. The battery has a voltage V = 6 V, the inductance of the inductor L = 12 mH and the capacitance of the capacitor 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. What is the charge on the capacitor at t = 0.487 ms?

A 5-µF capacitor is charged to 30 V and is then connected across a 10-µH inductor.The frequency of oscillation of the energy stored in the electric field of the capacitor and the magnetic field of the inductor is

A 10-mH inductor has an internal resistance of 10 $\Omega$ .The impedance of this inductor for a frequency of 60 Hz is approximately

If you were to plug a 1200-W heater and a 600-W toaster into a 110-V electrical outlet,what total rms current would these two appliances draw if the wiring is parallel?

At what frequency is the reactance of a 2-mH inductor equal to the reactance of a 100-pF capacitor?

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

You connect a 250- $\Omega$ resistor,a 1.20-mH inductor,and a 1.80- $\mu$ F capacitor in series across a 60.0-Hz,120-V (peak)source.When you connect a voltmeter across the resistor in this circuit,the meter reads approximately

You connect a 250- $\Omega$ resistor,a 1.20-mH inductor,and a 1.80- $\mu$ F capacitor in series across a 60.0-Hz,120-V (peak)source.When you connect a voltmeter across the inductor in this circuit,the meter reads approximately