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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

8 kVAR
12 kVAR
16 kVAR
10 kVAR

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AC Fundamentals, Circuit and Circuit Theory
The phosphors for which of the following pair are 180° out of phase for VL, VC and VR?

None of these
VC and VR
VC and VL
VL and VR

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

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

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AC Fundamentals, Circuit and Circuit Theory
The r.m.s. value of half wave rectified sine wave is 200 V. The r.m.s. value of full wave rectified AC. will be

111 V
100 V
282.8 V
141.4 V

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

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

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AC Fundamentals, Circuit and Circuit Theory
In a purely inductive circuit

Reactive power is zero
Apparent power is zero
None of the listed here
Actual power is zero

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