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Electric Circuits

Electric Circuits
From the circuit diagram shown in question 1 find the thevnin voltage.

 1.5 V.
 15 V.
 5 V.
 3 V.

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Electric Circuits
What is form factor?

 Average value / Peak value.
 Average value / R.M.S. value.
 Instantaneous value / Average value.
  R.M.S. value / Average value.

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Electric Circuits
Aluminium is produced from bauxite by

  electrolytic process.
  froth flotation.
  oxidation.
  rotating.

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Electric Circuits
The inductive reactance of an electric circuit is 200 Ohms. The frequency of supply becomes doubled. What is the new capacitive reactance?

 200 Ohms.
 50 Ohms.
 100 Ohms.
 400 Ohms.

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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

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

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Electric Circuits
The equation for 25 cycles current sine wave having rms value of 30 amps, will be

 30sin50πt.
 42.4sin50πt.
 30sin25πt.
 42.4sin25πt.

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