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Electric Circuits

Electric Circuits
In the above question find the angle between voltage and current?

 30.
 54.74.
 60.
 90.

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Electric Circuits
A capacitor is connected to supply with switch and the switch is connected between capacitor and supply. Initially switch is open at time zero, and then switch is closed. Then how capacitor behaves at time t = 0+?

 short circuit.
 dielectric losses increases.
 dielectric losses decreases.
 open circuit.

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Electric Circuits
There is a ________ between two nodes of signal flow graph

 link
None of these
 tree
 branch

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Electric Circuits
If two point charges are denoted by + Q and - Q and distance between this charges is d, then the dipole moment P equal to

  Q2 × d.
  Q × d.
  Q2 / d.
  Q / d2.

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Electric Circuits
Silver coating is provided for

  bearing surfaces.
  decorative purpose.
  all of above.
  protective purpose.

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Electric Circuits
A capacitor of 50 microfarad is connected in series with a resistance of 120 Ω. If above circuit is connected across 240 V, 50 Hz 1 - φ supply. Find the capacitive reactance?

 0.015 Ω.
 135.86 Ω.
 1.765 Ω.
 63.7 Ω.

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