AC Theory Exam Questions With Correct
Answers
When a steady direct current flows through a coil. The only opposition to the flow of current is
the resistance of the wire from which the coil is made. - answerTrue
Alternating current flowing through a coil is opposed by two factors, resistance (R...
The equation for finding power in a circuit when the current and voltage are known is ? . -
answer✔P =E x I
In a pure resistive circuit, the true power (or watts) is equal to the product of the ? and ? . -
answer✔Current/ Voltage
An electrical measurement called VARs is used to measure ? power. - answer✔Reactive
VARs are equal to the amount of current flowing through a(n) ? part of a circuit times the
voltage applied to the ? part of the circuit. - answer✔Inductive / Inductive
? power in a circuit is the voltage at a certain instant multiplied by the current at that same
instant. - answer✔Instantaneous
In an AC circuit, when both the current and voltage of the circuit have a positive value, the
power of this circuit is ? . - answer✔Positive
In an AC circuit, when the current of the circuit is negative and the voltage of the circuit is zero,
the power of this circuit has a ? value. - answer✔Zero
When the current and voltage are ? , one may be positive while the other is negative. -
answer✔Out of phase
When the current and voltage on a circuit reach maximum values at the same time, power is at its
? possible value. This happens when current and voltage are ? . - answer✔Maximum / in phase
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