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Electric Circuits

Electric Circuits
Which of following capacitor will have least value of breakdown voltage?

 Mica.
 Ceramic.
 Paper.
 Electrolytic.

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Electric Circuits
Our household apparatus are connected in

 series.
 cascade.
 series and parallel combination.
 parallel.

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Electric Circuits
To obtain a high value of capacitance, the permittivity of dielectric medium should be

 low
 zero
 unity
 high

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Electric Circuits
An AC voltage of 200 V at 50 Hz is applied to a coil which draws 5 A and dissipates 1000 W. The resistance and impedance of the coil respectively are

 40 Ω and 200 Ω.
 50 Ω and 200 Ω.
 40 Ω and 40 Ω.
 25 Ω and 5 Ω.

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Electric Circuits
When water is added to sulphuric acid

  acid particles get separated.
  lot of heat is generated.
  colour of acid changes.
  water start boiling.

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Electric Circuits
The resistivity of semi-conductors at room temperatures is

 1.6 × 106 to 100 × 106 ohm - cm.
 109 to 1012 ohm - cm.
 0.01 to 50 ohm - cm.
 1000 to 1500 ohm - cm.

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