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Electric Circuits

Electric Circuits
Which of the following is the correct relation?

 AD-BC = 1.
 AC-BD = 1.
 all of these.
 AB-CD = 1 .

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Electric Circuits
Select the wave that has the least value of form factor.

 Square wave.
 Sine wave.
 Rectangular wave.
 Triangular wave.

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Electric Circuits
When AC flows through a pure capacitance then the current

 leads the emf by - 90o.
 is in phase with emf.
 lags the emf by 90o.
 leads the emf by 90o.

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Electric Circuits
In above question, if circuit efficiency is 90 %. What will be output power ?

  35.6 kW.
  37.3 kW.
  30 kW.
  40 kW.

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Electric Circuits
Time constant of RL series circuit is

 2RC
 L/R
 RC
 2L/R

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Electric Circuits
A constant current source supplies a electric current of 300 mA to a load of 1 KΩ. When the load changed to 100 Ω, the load current will be

 30 mA.
 3 A.
 100 mA.
 300 mA.

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