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Electric Circuits

Electric Circuits
Capacitors for P.f correction are rated in

 KV.
 KW.
 KVA.
 KVAR.

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Electric Circuits
Three element having conductance G1, G2 and G3 are connected in parallel. Their combined conductance will be

 (1 / G1 + 1 / G2 + 1 / G3) - 1.
 (G1 + G2 + G3) - 1.
 G1 + G2 + G3.
 1 / G1 + 1 / G2 + 1 / G3.

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Electric Circuits
The arrangement of 12 cells each of internal resistance 1.5 Ohm to give maximum current in external load resistance of 2 Ohm will be

 all 12 in parallel.
 in 4 parallel rows each row having 3 cells in series.
 in 3 parallel rows each row having 4 cells in series.
 all 12 in series.

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Electric Circuits
When the internal resistance of a cell is large compared to the external resistance in the circuit then high current can flow through the external resistance by grouping the cells

 as in series.
 mixed.
 in either series or parallel.
 in parallel.

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Electric Circuits
The capacitance of a conductor is varying from 2 microfarad to zero in 1 sec linearly if the voltage applied to it is 6 V the energy stored in 0.5 sec in the condenser is

 18 µ joules.
 10 µ joules.
  55.1 µ joules.
 20 µ joules.

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Electric Circuits
The synchronous speed for the seventh space harmonic mmf wave of 8 pole, 50 Hz induction machine will be

 5250 rpm in reverse direction.
 5250 rpm in forward direction.
 107.14 rpm in reverse direction.
 107.14 rpm in forward direction.

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