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Electric Circuits

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

 N.
 b - N - 1.
 b - N + 1.
 N - 1.

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Electric Circuits
The ratio of the resistance of a 200 W, 230 V lamp to that of a 100 W, 115 V lamp will be

 0.25.
  2.
 4.
  0.5.

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Electric Circuits
If a pure inductor is connected across the ac source, the average power taken by the inductor is

 maximum power.
 a few watt.
 100 watt.
 zero watt.

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Electric Circuits
In RLC parallel circuit circuit current through inductor is more than current through capacitor. Then what is the power factor of the circuit?

 zero
 unity
 leading
 lagging

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Electric Circuits
The resistance of a strip of copper of rectangular cross section is 2 Ω. A metal of resistivity twice that of a copper is coated on its upper surface to a thickness equal to that of copper strip. The resistance of composite strip will be

 3 / 2 Ω.
 6 Ω.
 3 / 4 Ω.
 4 / 3 Ω.

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Electric Circuits
Current locus is obtained by which of the following?

 Varying source frequency
None of these
 Either of these
 Varying any one of the circuit element

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MORE MCQ ON Electric Circuits

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