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Electric Circuits

Electric Circuits
A capacitor carries a charge of 0.1 C at 5 V. Its capacitance is

 0.5 F
 0.02 F
 0.2 F
 0.05 F

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Electric Circuits
For the network shown below when I = 0, V = 20 V and when R = 0, I = 10 A. If now R = 3 Ω what is the value of the current I?

 4 A.
 10 A.
 6 A.
 5 A.

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Electric Circuits
What is the SI unit of electric current ?

 Ohm.
 Ampere.
None of these
 Faraday.

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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
Find the total power absorbed by the resistor in the given circuit.

 12 W.
 24 W.
 30 W.
  6 W.

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Electric Circuits
In a capacitive circuit, the capacitive reactance is

 indirectly proportional to frequency
 directly proportional to the square of frequency
 indirectly proportional to the square of frequency
 directly proportional to frequency

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