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AC Fundamentals, Circuit and Circuit Theory

AC Fundamentals, Circuit and Circuit Theory
The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of ________ degrees.

60
30
45
90

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

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

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

None of the listed here
Capacitive
Resistive
Inductive

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AC Fundamentals, Circuit and Circuit Theory
The apparent power drawn by an A.C. circuit is 10 kVA and active power is 8 kW. The reactive power in the circuit is

8 kVAR
16 kVAR
10 kVAR
12 kVAR

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AC Fundamentals, Circuit and Circuit Theory
The main cause of silting up a channel,

Non-regime section
All of these
Inadequate slope
Defective head regulator

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AC Fundamentals, Circuit and Circuit Theory
Form Factor is the ratio of

r.m.s. value/peak value
r.m.s. value/average value
Average value/peak value
Average value/r.m.s. value

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