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Electric Circuits

Electric Circuits
Current efficiency in electroplating is usually

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

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Electric Circuits
Electric flux is proportional to

 rate of change of potential difference.
 resistivity of medium.
 potential difference between electrodes.
 rate of change of current.

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Electric Circuits
Which part of magnetic path requires largest mmf?

 Air gap.
 Inductance.
 Coil.
 Core.

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Electric Circuits
If a resistor and an inductor are connected in series across a voltage source. Which two parameters in that circuit decrease if frequency of voltage source increases?

 Z and I.
 VR and I.
 VL and Z.
 VL and VR.

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Electric Circuits
Mica capacitor are characterised by all of following except

 stable operation.
 low losses.
 accurate value.
 low leakage reactance.

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Electric Circuits
In series RLC circuit, voltage across resistor, inductor and capacitor are 5V, 2V and 2V respectively. Find total voltage?

 9V
 2V
 4V
 5V

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