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AC Fundamentals, Circuit and Circuit Theory

AC Fundamentals, Circuit and Circuit Theory
At very low frequencies a series R-C circuit behaves as almost purely

Inductive
Capacitive
None of the listed here
Resistive

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AC Fundamentals, Circuit and Circuit Theory
In a highly capacitive circuit the

Actual power is more than its reactive power
Apparent power is equal to the actual power
Reactive power is more than the apparent power
Reactive power is more than the actual power

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AC Fundamentals, Circuit and Circuit Theory
The inductance of a coil can be increased by

Choosing core material having high relative permeability
Decreasing the number of turns
Decreasing the diameter of the former
Increasing core length

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AC Fundamentals, Circuit and Circuit Theory
For a sine wave with peak value Emax ___________ the average value is

None of the listed here
0.636 Emax
0.707 Emax
0.434 Emax

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AC Fundamentals, Circuit and Circuit Theory
Wire-wound resistors are unsuitable for use at high frequencies because they

Exhibit unwanted inductive and capacitive effects
Consume more power
Are likely to melt under excessive eddy current heat
Create more electrical noise

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AC Fundamentals, Circuit and Circuit Theory
Skin effect occurs when a conductor carries current at _________ frequencies.

Very low
Low
Medium
High

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