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Electric Circuits

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

 Power factor.
 Voltage.
 Current.
 All of above.

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Electric Circuits
Which of the following quantities remain the same in all parts of a parallel circuit

 power.
 voltage.
 current.
 resistance.

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Electric Circuits
A parallel plate capacitor has a capacitance of C farad. It area of the plates is doubled and the distance between them is half, the capacitance of the capacitor is

 2C Farad.
 C Farad.
 4C Farad.
 16C Farad.

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Electric Circuits
Two resistor are said to be connected in parallel when

 both have the same potential difference.
 both ‘b’ and ‘c’
 both carry the same value of current.
 total current equals the sum of branch currents.

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Electric Circuits
R1 = 36 Ω and R2 = 75 Ω, each having tolerance of ±5% are connected in series. The value of resultant resistance is

  111 ± 0 Ω.
 111 ± 7.23 Ω.
 111 ± 2.77 Ω.
  111 ± 5.55 Ω.

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Electric Circuits
The efficiency in case of maximum power transfer theorem is

 50 %.
 100 %.
 less than 50 %.
 50 % - 100 %.

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MORE MCQ ON Electric Circuits

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