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Electric Circuits

Electric Circuits
For same voltage, the ratio resistance of 100 W lamp to resistance of 25 W lamp is

 16.
 1.
 4.
 1/4.

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Electric Circuits
A balanced three Phase Y-connected load has one phase voltage VB = 277∠45o V. The phase sequence is RYB. The line to line voltage VRY is

 339∠45o V.
 480∠ - 45o V.
 480∠45o V.
 339∠- 45o V.

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Electric Circuits
The voltage across R and L in a series RL circuit are found to be 200 V and 150 V respectively the rms value of the voltage across the series combination is ______ V.

 450
 250
 200
 360

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Electric Circuits
VRN, VYN and VBN are three phase voltage of a balanced three phase system. If VRN = 200∠30o V and VBN = 200∠- 90o V, then phase sequence of the system is

 RYB.
 YRB.
 BRY.
 RBY.

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Electric Circuits
A 230V, 50Hz voltage is applied to a coil having L = 5H and R = 2 Ohm in series with capacitance C. When the voltage across the coil is 400V, find the value of C?

 10.54 µF.
 4.78 µF.
 8.51 µF.
 1.8 µF.

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Electric Circuits
In foster 1 form 1st element is

 none.
 capacitor.
 inductor.
 both.

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MORE MCQ ON Electric Circuits

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