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Electric Circuits

Electric Circuits
In direct arc furnace which of following is of high value?

 All of above.
 Power factor.
 Voltage.
 Current.

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Electric Circuits
The mass of a neutron of atom is

 1.602 × 10 - 19 Kg.
 1.609 × 10 - 31 Kg.
 1.675 × 10 - 27 Kg.
 1.672 × 10 - 26 Kg.

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Electric Circuits
Current efficiency in electroplating is usually

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

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Electric Circuits
Given network is having N nodes and B branches, then number of twigs are

 N - 1.
 N.
 B - N - 1.
 B - N + 1.

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Electric Circuits
The ratio of the resistance of a 200 W, 230 V lamp to that of a 100 W, 115 V lamp will be

 0.25.
 4.
  2.
  0.5.

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Electric Circuits
In a series resonant circuit impedance is

 maximum.
 minimum.
 zero.
 none of these.

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