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Electric Circuits

Electric Circuits
Aluminium is produced from bauxite by

  froth flotation.
  rotating.
  oxidation.
  electrolytic process.

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Electric Circuits
Consider the following circuit : Switch is closed at t = 0 Find i(0 +)

 V / {R + (sL + 1 / Cs)}.
 V/R.
 (V*L) / (R*C)
 0.

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Electric Circuits
Which cell has the reversible chemical reaction?

 Lead acid.
 Mercury oxide.
 Carbon Zinc.
 Silver oxide.

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Electric Circuits
The value of supply voltage for 400 W, 4 Ω load is

 20 V.
 200 V.
 40 V.
 400 V.

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Electric Circuits
When resistance element of a heater fuses and then we reconnect it after removing a portion of it, the power of heater will

  decrease.
  remain constant.
  none of these.
  increase.

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Electric Circuits
To obtain high efficiency, network is designed with which of the following?

 Zero Q factor
 Unity Q factor
 High Q factor
 Low Q factor

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