Exam 8: Ac Circuits

In resonant circuits, at a certain frequency, the reactance of the coil is equal to the reactance of the capacitor, and the combined reactance is zero.

For parallel AC circuits, at any instant, the current is the same value across all branches of a parallel AC circuit, and is equal to the supply current at that instant.

____ are often more practical for power factor improvement than capacitors are because they can drive a mechanical load as well as develop a leading power factor.

____ is a factor affecting the amount of current flowing in a pure resistive circuit.

____ are caused by voltages induced into the conductors and other surrounding metal parts.

The combined resistance of an AC series circuit is equal to the ____ of the individual resistances of the circuit.

Most circuits contain more than pure resistance, pure inductance, or pure capacitance; therefore, each path of a parallel circuit must be treated as a separate ____ circuit.

A resonant circuit contains resistance, inductance, and ____.

Maintaining a(n) ____ power factor provides a more efficient operation.

An RL parallel circuit is a circuit with branches containing resistance and ____.

The nameplate information on a piece of electrical equipment includes the rating in kilovolt-amperes or kilowatts, voltage, amperes, and ____.

When a circuit contains inductive components, these components contain both resistance and inductive ____.

Resistive heating units and incandescent lighting are considered to be pure resistive loads.

To solve RLC parallel circuits, the RL portion is usually solved first, and then the LC or RC portion is considered.

The true power is also called effective power because it has a direct effect on the load.