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Electric Circuits

Electric Circuits
The alternative names for active power is/are

 average power.
 real power.
 true power.
All of these

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Electric Circuits
A capacitor has a capacitance of 6 μF. Calculate the stored energy in it if a DC voltage of 100 V, is applied across it?

 4 × 102 joules.
 2.5 × 102 joules.
 6 × 102 joules.
 3 × 102 joules.

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Electric Circuits
Which of the following may be the value of resistivity of copper at absolute zero in ohm-metre?

 3.12.
 0.020.
 6.24.
 1.56.

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Electric Circuits
A balanced delta connected load has an impedance of 9∠30o Ω per phase. What is the impedance per phase of its equivalent star?

 30∠30o Ω.
None of these
 3∠30o Ω.
 27∠30o Ω

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Electric Circuits
A load is connected to an active network. At the terminals to which the load is connected, RTH = 10 Ohm, VTH = 60V. Then maximum power supplied to the load is

 60W.
 90W.
 180W.
 360W.

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Electric Circuits
An alternating voltage = 140 sinθ is supplied to a device which offers a resistance of 20 Ω in forward direction of current in reverse direction. Calculate the form factor.

 0.318.
 1.414.
 0.57.
 1.11.

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