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Electric Circuits

Electric Circuits
Poorest conductor of electricity is

  Silver.
  Steel.
  Carbon.
  Aluminium.

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Electric Circuits
Aluminium is produced from bauxite by

  rotating.
  froth flotation.
  oxidation.
  electrolytic process.

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Electric Circuits
A balanced three Phase Y-connected load has one phase voltage VB = 277∠45o V. The phase sequence is RYB. The line to line voltage VRY is

 480∠ - 45o V.
 339∠45o V.
 339∠- 45o V.
 480∠45o V.

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Electric Circuits
By which of the following elements transients will not occur?

 C
 L
 R
All of these

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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 / 2.
  R / 3.
 R / 4.
 R / 6.

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Electric Circuits
A series circuit consists of R = 20 Ω, L = 20 mH, and AC supply 60 V with f = 100 Hz. The voltage drop across R is

  50.8 V.
 40.8 V.
 24.4 V .
  30.6 V.

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MORE MCQ ON Electric Circuits

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