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Electric Circuits

Electric Circuits
The fixed circular paths around the nucleus are called

 orbitals.
 nucleus.
 orbits.
 mesons.

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Electric Circuits
A positive and a negative charged conductor are initially 50 mm apart. When they are moved close together so that they are now only 10 mm apart, the force between them will be

 25 times larger than before.
 10 times greater than before.
 5 times smaller than before.
 5 times greater than before.

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Electric Circuits
When a lossy capacitor with a dielectric of permittivity ε and conductivity σ operates at a frequency ω the loss tangent for the capacitor is given by

 σ ω ε.
  σ/ω ε.
 ω ε/σ.
 ω σ/ε.

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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?

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

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Electric Circuits
Bulb in street lighting are connected in

 series parallel.
 series.
 end of end.
 parallel.

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Electric Circuits
Current efficiency in electroplating is usually

  70 to 80 %.
  99 %.
  50 to 60 %.
  90 to 98 %.

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MORE MCQ ON Electric Circuits

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