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Electric Circuits

Electric Circuits
A coil with negligible resistance has 50 V across it with 10 mA. The inductive reactance is

 5000 ohms.
 50 ohms.
 500 ohms.
 1000 ohms.

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Electric Circuits
Five cells are connected in series in a row and then four such rows are connected in parallel to Feed the current to a resistive load of 1.25Ω. Each cell has an emf of 1.5 V with internal resistance Of 0.2Ω. The current through the load will be

 5 A
 1 A
 23.33 A
 3.33 A

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Electric Circuits
Three resistors each R Ohm is connected to form a triangle. The equivalent resistance across any terminals is

 R/2.
 3R/2.
 2R/3.
 R.

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Electric Circuits
What is the reactive power in AC operation?

 Apparent power × cosθ.
 Real power × sinθ.
 Real power × cosθ.
 Apparent power × sinθ.

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Electric Circuits
Under resonance condition the power factor of a system is

 unity
 any of the above
 leading
 lagging

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Electric Circuits
Cells are connected in parallel in order to increase

 current capacity.
 life of the cells.
 efficiency.
 voltage rating.

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MORE MCQ ON Electric Circuits

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