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Electric Circuits

Electric Circuits
In RLC parallel circuit if current through capacitor and inductor is equal. Then What is the power factor?

 lagging
 unity
 zero
 leading

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Electric Circuits
A voltage of v = 100 sin (wt + π/3) is applied to pure resistor of 30 Ohm. What is the RMS value of current is

 5.77.
 4.71.
 1.92.
 2.36.

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Electric Circuits
A balanced star connected load with impedance of 30j - 300 Ω is supplied from a 3 - phase, 4-wire, 173 V system, the voltages to neutral being 100j -900, 100j - 300 and 100j -1500 V. The current in neutral wire is

  zero.
  5 A.
  8.85 A.
  50 A.

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Electric Circuits
Which of following is the unit of magnetic flux density?

 Tesla.
 Lumens.
 Weber.
 Daraf.

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Electric Circuits
What is the relation between time period T and frequency?

 T = frequency.
 T = 1 / frequency.
 T = 0.5 / frequency.
 T = 0.85 / frequency.

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Electric Circuits
What is the value of charge of an electron?

 1.6022 × 10-27 Coulomb
 1.6022 × 10-8 Coulomb
 1.6022 × 10-7 Coulomb
 1.6022 × 10-19 Coulomb

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