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Electric Circuits

Electric Circuits
If P is the power of a star connected system then what will be power of an equivalent delta connected system?

 P
 P/3
None of these
 3P

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Electric Circuits
The capacitive reactance of a capacitor of (1 / 2μF) F at 103 Hz is

 10 3 μF.
 10- 6 μF.
 10- 3 μF.
 10 6 μF.

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Electric Circuits
A 230V, 50Hz voltage is applied to a coil having L = 5H and R = 2 Ohm in series with capacitance C. When the voltage across the coil is 400V, find the value of C?

 8.51 µF.
 4.78 µF.
 1.8 µF.
 10.54 µF.

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Electric Circuits
According to duality principle a series inductor (L) can be represented as

 Series C.
 Parallel L.
 Series L.
 Parallel C.

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Electric Circuits
Twelve 6 Ω resistor used as edge to form a cube. The resistance between two diagonally opposite corner of the cube is

 5 Ω.
 6 Ω.
 5 / 6 Ω.
 6 / 5 Ω.

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Electric Circuits
The instantaneous values of line current into a delta connected load in any two lines are + 2.5 amps and - 1.25 amps the current in the third line at the instant is ___________ A.

 - 1.25
 10
 1
 2.5

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