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Electric Circuits

Electric Circuits
Aluminium is produced from bauxite by

  rotating.
  froth flotation.
  electrolytic process.
  oxidation.

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Electric Circuits
What is the SI unit of electric current ?

 Faraday.
 Ampere.
 Ohm.
None of these

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Electric Circuits
Which of the following quantities consists of SI unit as WATT ?

 Power
 Force
 Charge
 Current

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Electric Circuits
The time required for a pulse to change from 10 % to 90 % of its maximum value is known as

 fall time.
 decay time.
 rise time.
 run time.

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Electric Circuits
A 3 – φ delta connected symmetrical load consumes P Watts of power from a balanced supply. If the same load is connected in star to the same supply then what is the power consumption?

 √3P.
 P/3.
 P.
 3P.

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Electric Circuits
In a delta network each element has value R. The value of each element in equivalent star network will be

 R / 4.
  R / 3.
 R / 2.
 R / 6.

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