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Electric Circuits

Electric Circuits
In RLC parallel circuit to get Q>1 which of the following is required?

All of these
 XL>R
 XL
 XL=R

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Electric Circuits
For balanced star load, if unbalanced line current are IR, IY, IB equal to - j10, - j10 and - j20 respectively, the neutral current will be equal to

  (-9.66 + j5) A.
  (8.66 - j5) A.
  (8.66 + j5) A.
  (-8.66 - j5) A.

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Electric Circuits
A variable capacitance is one whose capacitance

 changes with time.
 changes with temperature.
 can be changed manually or by mechanical force.
 changes with voltage.

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Electric Circuits
For symmetrical wave form average value of one full cycle is

 1
 1.11
 0
 2.22

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Electric Circuits
A circuit contains two unequal resistor in parallel

 heat losses in both are same.
 voltage drops across both are same.
 currents in both are same.
 voltage drops are according to their resistive value.

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Electric Circuits
Consider the following circuit : Switch is closed at t = 0 Find i(0 +)

 V / {R + (sL + 1 / Cs)}.
 0.
 V/R.
 (V*L) / (R*C)

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