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Electric Circuits

Electric Circuits
Which of the following may be value of resistivity of copper?

 1.7 X 10 - 6.
 1.7 X 10 - 5.
 1.7 X 10 - 4.
 1.7 X 10 - 3.

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Electric Circuits
Total power consumed in the circuit below is 10 W. Find X.

 3 A.
 None of these.
 1 A.
  2 A.

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Electric Circuits
Which metal is deposited for electro forming?

  Nickel.
  Silver.
  Chromium.
  Iron.

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Electric Circuits
Common impurity in battery electrolyte is

 lead sulfate.
 dust.
 iron.
 sodium chloride.

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Electric Circuits
Atoms with fewer than 4 valence electrons are

 none of these.
 insulator.
 conductor.
 semi-conductor.

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Electric Circuits
When 125 V is applied across a 250 V, 100 W filament incandescent bulbs, the power consumption is

 100 W.
 25 W.
 12.5 W.
 50 W.

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