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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
 2 μsec
 1 μsec
 4 msec

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Electric Circuits
Open circuit voltage of a fully charged lead acid cell is

 2.5 V.
 2 V.
 2.7 V.
 1.9 V.

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Electric Circuits
If the dielectric of a capacitor is replaced by conducting material

 the capacitor can store infinite charge.
 the capacitance value of the plate will decrease.
 the capacitor will get heated up due to eddy currents.
 the plate will get short circuited.

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Electric Circuits
If the length of a wire of resistance R is uniformly stretched to n times its original value, what will be its new resistance

  n2 / R.
  n2R.
  R / n2.
  nR .

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Electric Circuits
The phase angle difference between current and voltage is 90o, the power will be

 zero.
 maximum.
 minimum.
 VI.

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Electric Circuits
Twelve 6 Ω resistor used as edge to form a cube. The resistance between two diagonally opposite corner of the cube is

 6 Ω.
 5 Ω.
 6 / 5 Ω.
 5 / 6 Ω.

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