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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
Two equal resistors R connected in series across a voltage source V dissipate power P. What would be the power dissipated in the same resistors when they are connected in parallel across the same voltage source?

 4P.
  P.
 16P.
 2P.

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Electric Circuits
The current in the resistor R shown in figure will be

 0.8 A.
 0.4 A.
 0.6 A.
 0.2 A.

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Electric Circuits
Common impurity in battery electrolyte is

 dust.
 sodium chloride.
 iron.
 lead sulfate.

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Electric Circuits
What is the relation between line voltage and phase voltage in case of delta connection?

 VL = √3 VP.
 None of these.
 VL = VP.
 VL = 1/ √3 VP.

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Electric Circuits
Two resistor are said to be connected in parallel when

 total current equals the sum of branch currents.
 both ‘b’ and ‘c’
 both carry the same value of current.
 both have the same potential difference.

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