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Electric Circuits

Electric Circuits
The active and reactive power in an AC circuit are 10W and 20VAR respectively. What is the power factor?

 0.866.
 0.577.
 1.
 0.5.

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Electric Circuits
For closer tolerance which of the following capacitors is usually preferred?

 Ceramic disc capacitor.
 None of them.
 Paper capacitor.
 Mica capacitor.

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Electric Circuits
The delta equation of given star connected impedance ZQR is equal to

 (5 + j10 / 3) Ω.
 (20 + j10) Ω.
  (10 + j30) Ω.
 40 Ω.

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Electric Circuits
A capacitor in a circuit became hot and ultimately exploded due to wrong connection, which type of capacitor it could be?

 Electrolytic capacitor.
 Any of above.
 Paper capacitor.
 Ceramic capacitor.

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Electric Circuits
A reactance having an inductor of 0.15 H is connected in series with 10 Ω resistance. What will be the inductive reactance?

 1.5 Ω.
 48.15 Ω.
 None of these.
 47.1 Ω.

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Electric Circuits
Final value theorem is not applicable for which of the following?

 unstable systems
 marginally stable systems
 Both 2 and 3
 stable systems

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