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Electric Circuits

Electric Circuits
Internal resistance of ideal current source is

 infinite
 zero
 finite
 100 ohms

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Electric Circuits
Electrolyte for silver plating is

  dilute sulphuric acid.
  potassium nitrate solution.
  any of above.
  double cyanide of silver and potassium solution.

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Electric Circuits
In RC series circuit R = 2Ω, C = 2μF and 10V dc is applied. Then what is the value of current?

 10A
 2A
 0A
 5A

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Electric Circuits
A 230V, 50Hz voltage is applied to a coil having L = 5H and R = 2 Ohm in series with capacitance C. When the voltage across the coil is 400V, find the value of C?

 1.8 µF.
 10.54 µF.
 4.78 µF.
 8.51 µF.

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Electric Circuits
A current is said to be alternating when it changes in

 magnitude.
 both ‘a’ and ‘b’.
 none of these.
 direction.

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Electric Circuits
A circuit with resistor, inductor, capacitor in series is resonant of 50 Hz. If all the values are now doubled, the new resonant frequency is

 f0 / 2.
 still f0.
 f0 / 4.
 2f0.

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MORE MCQ ON Electric Circuits

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