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AC Fundamentals, Circuit and Circuit Theory

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

10 kVAR
8 kVAR
12 kVAR
16 kVAR

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AC Fundamentals, Circuit and Circuit Theory
Power factor of an electrical circuit is equal to

Ratio of useful current to total current Iw/I
Cosine of phase angle difference between current and voltage
all of these
R/Z

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AC Fundamentals, Circuit and Circuit Theory
In AC. circuits, laminated iron is invariably used in order to

Reduce eddy current loss
Reduce circuit permeability
Make assembly cheap and easier
Increase heat radiation

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AC Fundamentals, Circuit and Circuit Theory
Power factor of the following circuit will be zero

Resistance
Capacitance
Inductance
Both of the listed here

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

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

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AC Fundamentals, Circuit and Circuit Theory
The voltage of domestic supply is 220 V. This figure represents

Average value
Mean value
R.m.s. value
Peak value

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