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Electric Circuits

Electric Circuits
Which of the following has positive temperature coefficient ?

  Paper.
  Rubber.
  Germanium.
  Gold.

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Electric Circuits
During electroplating the amounts of different substances liberated by same quantity of electricity are proportional to their

  chemical equivalents.
  atomic numbers.
  valency.
  atomic weights.

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Electric Circuits
The form factor of sinusoidal alternating current is

 1.15.
 0.
 1.11.
 1.

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Electric Circuits
The average value of half wave rectified sinusoidal current waveform, whose maximum value is 1A is

 0.318 A.
 0.637 A.
 1 A.
 0.5 A.

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Electric Circuits
Disadvantages of constant k type filter

  none of these.
  attenuation does not increase rapidly beyond cut off frequency.
  characteristic impedance unchanged in pass band.
  both A and B.

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Electric Circuits
Current efficiency in electroplating is usually

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

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MORE MCQ ON Electric Circuits

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