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A current that leads its voltage source by 30° uses more power than a current that lags its voltage source by 30°.

In a circuit containing only resistance, the current and the voltage are 90° out of phase.

Resistance causes electric energy to be converted into heat energy.

Industry pays more for a unit of energy used at a high power factor than one used at a low power factor.

Power factor and cosθ have the same numerical value.

A wattmeter measures apparent power.

Electrons travel from one plate through the dielectric to the other plate when a capacitor is charged.

A capacitor rapidly discharges once it is disconnected from the battery that charged it.

Capacitive reactance is directly proportional to capacitance.

Capacitive reactance is inversely proportional to frequency.

Electrons travel through the dielectric material when a capacitor is being charged.

The lowest-value capacitor develops the highest voltage in dc circuit.

Except for the charging current, a capacitor blocks direct current.

For a given weight and size, a capacitor stores more energy than a battery.

The voltage rating of a foil capacitor is a dc voltage rating.

A straight length of conductor has no inductance.

The reactance of an inductor can be measured with an ohmmeter.

The iron core of an inductor converts some electric energy into heat energy.

Impedance is a combination of reactance and resistance.

In a series RC circuit,the reference phasor is the current phasor.