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Electric Circuits

Electric Circuits
A wire of resistance R has it length and cross - section both doubled. Its resistance will become

 2R.
 R.
 4R.
 0.5R.

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Electric Circuits
The rms value of the resultant current in a wire which carries a DC current of 10A and a sinusoidal current of peak value 20A is

 17.3A .
 22.4A.
 30A.
 14.14A.

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Electric Circuits
Find the total power absorbed by the resistor in the given circuit.

  6 W.
 30 W.
 12 W.
 24 W.

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Electric Circuits
The plates of lead acid storage battery are most likely to be short circuited if

 the electrolyte evaporates.
 the battery charged too slowly.
 sediment collect at the bottom of the battery.
 too much water is added.

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Electric Circuits
If N is the number of nodes and b is the number of branches in a network, then rank of tie set matrix is

 b - N + 1.
 N.
 N - 1.
 b - N - 1.

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Electric Circuits
If a resistor and an inductor are connected in series across a voltage source. Which two parameters in that circuit increase if frequency of voltage source increases?

 Z and I.
 VL and VR.
 VL and Z.
 VL and I.

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MORE MCQ ON Electric Circuits

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