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Electric Circuits

Electric Circuits
The life of a lead acid battery is expected to be

 2 to 5 years.
 6 months.
 1 year.
 10 to 15 years.

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Electric Circuits
If the length of a wire of resistance R is uniformly stretched to n times its original value, what will be its new resistance

  nR .
  R / n2.
  n2R.
  n2 / R.

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Electric Circuits
In direct arc furnace which of following is of high value?

 All of above.
 Current.
 Voltage.
 Power factor.

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Electric Circuits
If a resistor and an inductor are connected in series across a voltage source. Which two parameters in that circuit decrease if frequency of voltage source increases?

 VL and Z.
 VL and VR.
 VR and I.
 Z and I.

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Electric Circuits
The voltage across R and L in a series RL circuit are found to be 200 V and 150 V respectively the rms value of the voltage across the series combination is ______ V.

 360
 200
 450
 250

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Electric Circuits
A capacitor passes a current of 12.6 mA when supplied with 20 V ac with a frequency of 1000 Hz. The capacitance will be

 0.1 μF.
 0.01 μF.
 0.001 μF.
 1 μF.

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MORE MCQ ON Electric Circuits

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