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Electric Circuits

Electric Circuits
A voltage of v = 100 sin (wt + π/3) is applied to pure resistor of 30 Ohm. What is the RMS value of current is

 5.77.
 1.92.
 4.71.
 2.36.

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Electric Circuits
The ratio of the resistance of a 200 W, 230 V lamp to that of a 100 W, 115 V lamp will be

  0.5.
 0.25.
 4.
  2.

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Electric Circuits
The resistivity of the conductor depends on

 area of the conductor.
 length of the conductor.
 type of material.
 none of these.

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Electric Circuits
A capacitor carries a charge of 0.1 C at 5 V. Its capacitance is

 0.5 F
 0.05 F
 0.2 F
 0.02 F

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Electric Circuits
In RLC parallel network R = 2 Ohm, L = 2mH and C = 1μF. Find the value of time constant?

 4 msec
 4 μsec
 2 msec
 2 μsec

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Electric Circuits
A capacitor has a capacitance of 6 μF. Calculate the stored energy in it if a DC voltage of 100 V, is applied across it?

 3 × 102 joules.
 6 × 102 joules.
 2.5 × 102 joules.
 4 × 102 joules.

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