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Electric Circuits

Electric Circuits
Energy efficiency during electroplating is usually in the range

 90 to 99%.
 85 to 90%.
 50 to 80%.
 80 to 85%.

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Electric Circuits
Power dissipation in ideal inductor is

 Zero
 Maximum
 A finite value
 Minimum

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Electric Circuits
The resistance of 200 W, 200 V lamp is

 400 Ω.
 100 Ω.
 800 Ω.
  200 Ω.

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Electric Circuits
If a resistor is connected across the voltage source and the frequency of voltage and current wave form is 50Hz, then what is frequency of instantaneous power

 100 Hz.
 150 Hz.
 0 Hz.
 50 Hz.

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Electric Circuits
In above question, determine the current if E = 100 V, R = 20Ω, R1 = 10 Ω and L = 2 H at 0.5 sec after short circuit.

 - 9.59.
 - 6.28.
 6.98.
 9.59.

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Electric Circuits
Condition for a balanced 3 - phase load is that, each phase has the same value of __________________.

 resistance.
 impedance.
 all of these.
 power factor.

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MORE MCQ ON Electric Circuits

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