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Electric Circuits

Electric Circuits
Which quantity consists of a unit 1KWh ?

 Time
 Power
 Charge
 Energy

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Electric Circuits
A two port network is defined by the relation The value of Z12 is

 2/31.
 -3.
 3.
 3/41.

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Electric Circuits
An electrical motor has rating of 10 MVA at 0.8 lag, represented as series RL circuit at a 50 MVA base. Find the impedance value?

 (2 + j4) pu
 (3 + j4) pu
 (4 + j3) pu
 (4 + j2 ) pu

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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

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

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Electric Circuits
Three identical inductors are connected in delta with a 220 V, 50 Hz, 3 - φ, supply. If the phase current is 24 A, then what is the value of each of the inductance?

 None of these.
 0.058 H.
 0.049 H.
 0.029.

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Electric Circuits
When 125 V is applied across a 250 V, 100 W filament incandescent bulbs, the power consumption is

 25 W.
 100 W.
 50 W.
 12.5 W.

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