Exam 29: Alternating-Current Circuits

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.The rms current in your circuit is approximately

An AC power supply,V = V_o sin $\omega$ t,is connected in series to an inductor,capacitor,and resistor.The sum of the peak voltages across the inductor,capacitor and resistor is

A 5-µF capacitor is charged to 30 V and is then connected in series with a 10-µH inductor and a 50- $\Omega$ resistor.The potential difference across the resistor after a long time has passed will be

The rms value of house voltage in much of Europe is 220 V.What is the maximum voltage?

A 15- $\Omega$ resistor is connected ACross a sinusoidal source that has a peak value of 75 V.The average power delivered by this source is approximately

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

The power dissipated per cycle is

A 500-W toaster is plugged into a 120-V AC outlet.What is the peak current in the toaster?

A circular coil of radius 10 cm and a separate square coil of side 20 cm are both rotated in a magnetic field of 1.5 T.If the circular coil is rotated at a frequency of 60 Hz,then at what frequency must the square coil be rotated in order for both coils to have the same maximum induced voltage?

The reACtance of an inductor is 100 $\Omega$ at 2 kHz.The inductance of this inductor is

A 5-µF capacitor is charged to 30 V and is then connected across a 10-µH inductor.The maximum value of the current in this circuit is

Use the following figure for the next problem. An AC power supply, V = 20 V sin where = 200 rad/s is connect to an inductor L = 180 mH and a capacitor C = 25 XL = 36 ohms, XC = 200 ohms, Z = 43.9 ohms -What is the peak current flow out of the AC power supply?

A 5-µF capacitor is charged to 30 V and is then connected in series with a 10-µH inductor and a 50- $\Omega$ resistor.The current in this circuit after a long time has passed will be

How much does the maximum EMF produced by a generator (a rotating coil)change if the area of the coil is doubled and the angular frequency halved?

At what frequency is the reACtance of a 1.5-mH inductor equal to 5.0 $\Omega$ ?

How much does the maximum EMF produced by a generator (a rotating coil)change if the area of the coil is quadrupled?

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 these conditions the current

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

You connect a 50.0- $\Omega$ resistor,a 2.40-mH inductor,and a 5.60-pF capacitor in series across a 60.0-Hz,120-V (peak)source.The Q factor for this circuit is approximately

A series RLC circuit with L = 5 H,C = 10 µF,and R = 10 $\Omega$ is driven by a generator with a maximum EMF of 100 V and a variable frequency.The Q value of this circuit is