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Electric Circuits

Electric Circuits
A current of 1 mA flows through a 1M ohm, 2 W carbon resistor. The power dissipated as heat in the resistor will be

 1 W.
 0.5 W.
 2 W.
None of these

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Electric Circuits
The alternative names for active power is/are

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

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Electric Circuits
Three resistances of two ohms each are connected in star. In the equivalent delta representation each resistance will have a value of _______________ Ω.

 3.4.
 6.
 5.2.
 0.6.

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Electric Circuits
The strength of current in 1 H inductor changes at rate of 1 A / sec. Find the voltage across it?

 2 V.
 0.5 V.
 None of these.
 1 V.

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Electric Circuits
A series RLC circuit is connected across a 240V, 50 Hz supply. When the voltage across capacitor is 250V, a maximum current of 0.5A flows in the circuit. Find the resistance.

 100 Ohms.
 500 Ohms.
 1000 Ohms.
 480 Ohms.

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Electric Circuits
Current efficiency in electroplating is usually

  70 to 80 %.
  90 to 98 %.
  99 %.
  50 to 60 %.

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