General Electrical Study Guide Flashcards
The working voltage of a capacitor in an AC circuit should be what?
At least 50 percent greater than the highest applied voltage.
The term that describes the combined resistive forces in an AC circuit is what?
Impedance.
What is the opposition to the flow of AC produced by an electromagnetic field (EMF) with generated back voltage called?
Inductive reactance.
Electrostatic fields are also known as what?
Dielectric fields.
The basis for transformer operation in the use of alternating current is mutual what?
Inductance.
The opposition offered by a coil to the flow of alternating current (ignoring resistance) is called.
Inductive reactance.
What factors strengthen a coil inductor?
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.
(Refer to Figure 1) When different rated capacitors are connected in series in a circuit, the total capacitance is what?
Less than the capacitance of the lowest rated capacitor.
Capacitors are sometimes used in DC circuits to what?
Smooth at slight pulsations in current/voltage.
In an AC circuit, the effective voltage is what?
Less than the maximum instantaneous voltage.
The amount of electricity a capacitor can store is directly proportional to the what?
Plate area and inversely proportional to the distance between the plates.
What is the total capacitance of a certain circuit containing three capacitors with capacitances of .02 microfarad, .05 microfarad, and .10 microfarad, respectively?
0.0125 microfarad.
What is the total capacitance of a circuit containing three capacitors in parallel with capacitances of .02 microfarad, .05 microfarad, .10 microfarad, respectively?
.170 microfarad.
Unless otherwise specified, any values given for current or voltage in an AC circuit are assumed to be what?
Effective values.
