AC Quiz

The working voltage of a capacitor in an AC circuit should be

• equal to the highest applied voltage.

• at least 20 percent greater than the highest applied voltage.

• at least 50 percent greater than the highest applied voltage.

The term that describes the combined resistive forces in an AC circuit is

• resistance

• reactance

• impedance

What is the opposition to the flow of AC produced by an electromagnetic field (EMF)
with generated back voltage called?

• Inductive reactance

• Capacitive reactance

• Mutual inductance

The basis for transformer operation in the use of alternating current is mutual

• inductance

• capacitance

• reactance

The opposition offered by a coil to the flow of alternating current (ignoring
resistance) is called

• impedance

• reluctance

• inductive reactance

What factors strengthen a coil inductor

• Limiting and separating the coils.

• Adding and separating the coils

• Adding coils close together

An increase in which of the following factors will cause an increase in the inductive
reactance of a circuit?

• Inductance and frequency

• Resistance and voltage

• Resistance and capacitive reactance

(Refer to Figure 1.) When different rated capacitors are connected in series in a
circuit, the total capacitance is

• less than the capacitance of the lowest rated capacitor

• greater than the capacitance of the highest rated capacitor

• equal to the sum of all the capacitances.

Capacitors are sometimes used in DC circuits to

• counteract inductive reactance at specific locations.

• smooth out slight pulsations in current/voltage.

• assist in stepping voltage and current up and/or down.

In an AC circuit, the effective voltage is

• equal to the maximum instantaneous voltage.

• greater than the maximum instantaneous voltage.

• less than the maximum instantaneous voltage.