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Electric Circuits

Electric Circuits
Aluminium is produced from bauxite by

  electrolytic process.
  rotating.
  froth flotation.
  oxidation.

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Electric Circuits
In RL series circuit R=2Ω and L=10mH and applied voltage is 10V DC. Then find the current in the network?

 10A
 5A
 1A
 0A

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Electric Circuits
What is Va in the below circuit?

 (4R + 10) / 3.
 (3R + 10) / 3.
 (6R + 10) / 3.
 (6R - 10) / 3.

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Electric Circuits
Among the options which metal has the highest electrical conductivity?

 Steel.
 Stranded aluminium.
 Aluminium.
 Copper.

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Electric Circuits
If emf in a given circuit is given by e = 100 sinω0t, then maximum value of voltage and frequency will be

 50√2 V, 100 Hz.
 100 V, 100 Hz.
 100√2 V, 100 Hz.
 100 V, 50 Hz.

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Electric Circuits
The maximum value of a current wave is 2A. If the form factor of a current wave is 1.5 and the peak factor is 2.7, find the rms value in Amperes.

 1.414 A.
 0.494 A.
 0.741 A.
 1.57 A.

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