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Electric Circuits

Electric Circuits
Which of the following lamp has least resistance ?

  200 W, 220 V.
  60 W, 220 V.
 100 W, 220 V.
  25 W, 220 V.

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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

 N.
 N - 1.
 b - N + 1.
 b - N - 1.

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Electric Circuits
The maximum current rating for a 10 k Ω, 0.5 W resistor is

 28.28 mA.
 7.07 mA.
 0.707 mA.
 14.14 mA.

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Electric Circuits
A balanced delta connected load has an impedance of 9∠30o Ω per phase. What is the impedance per phase of its equivalent star?

 30∠30o Ω.
None of these
 3∠30o Ω.
 27∠30o Ω

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Electric Circuits
A circuit contains two unequal resistor in parallel

 voltage drops across both are same.
 heat losses in both are same.
 currents in both are same.
 voltage drops are according to their resistive value.

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Electric Circuits
Air gap flux density is of the order of

 0.85 - 0.9 T.
 0.75 - 0.8 T.
  0.35 - 0.5 T.
  0.65 - 0.9 T.

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