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Electric Circuits

Electric Circuits
In RLC series circuit R = 2Ω, L = 2mH and C = 1μF. Find the time constant of the circuit?

 2 msec
 4 msec
 2 μsec
 1 μsec

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Electric Circuits
Basic cut set matrix consists of

 any number of branches.
 no branches.
 2 branch.
 one branch.

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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

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

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Electric Circuits
Reactive power drawn by a pure resistor is

 minimum
 maximum
 0
None of these

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Electric Circuits
In RLC parallel circuit circuit current through inductor is more than current through capacitor. Then what is the power factor of the circuit?

 leading
 unity
 zero
 lagging

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Electric Circuits
The internal resistance of a dry cell is of the order of

  1 to 15 Ohm.
  2 to 5 Ohm.
  0.2 to 0.4 Ohm.
  1 to 1.5 Ohm.

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