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Electric Circuits

Electric Circuits
Among the options which metal has the highest electrical conductivity?

 Steel.
 Copper.
 Aluminium.
 Stranded aluminium.

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Electric Circuits
Two battery having unequal emf

 cannot be connected in series.
 can be connected in series only.
 both a and d
 cannot be connected in parallel.

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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?

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

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Electric Circuits
The rms value of sine wave is 100 A. Its peak value is

 70.7 A.
 141.4 A.
 150 A.
 282.8 A.

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Electric Circuits
Efficiency of electrical machines should be calculated by measuring

 output and input.
 losses and output.
 losses.
 losses and input.

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Electric Circuits
To obtain high efficiency, network is designed with which of the following?

 Unity Q factor
 Zero Q factor
 High Q factor
 Low Q factor

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MORE MCQ ON Electric Circuits

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