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Electric Circuits

Electric Circuits
The capacitive reactance of a capacitor of (1 / 2μF) F at 103 Hz is

 10- 6 μF.
 10 6 μF.
 10 3 μF.
 10- 3 μF.

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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

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

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Electric Circuits
A ceramic and a mica capacitor have the same physical dimension. Which has the higher value of capacitance?

 Ceramic capacitor.
  It is impossible to conclude on the basis of information supplied.
 Mica capacitor.
 Both have identical value of capacitor.

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Electric Circuits
Zinc cadmium and lead coating is generally provided for

  all of above.
  corrosion.
  electrical contacts.
  decoration.

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Electric Circuits
Inductor does not allow the sudden change of

 power
 current
None of these
 voltage

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Electric Circuits
Which metal is deposited for electro forming?

  Silver.
  Iron.
  Chromium.
  Nickel.

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