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Electric Circuits

Electric Circuits
Under resonance condition the power factor of a system is

 leading
 any of the above
 lagging
 unity

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Electric Circuits
A positive and a negative charged conductor are initially 50 mm apart. When they are moved close together so that they are now only 10 mm apart, the force between them will be

 5 times smaller than before.
 5 times greater than before.
 10 times greater than before.
 25 times larger than before.

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Electric Circuits
From the circuit diagram shown in question 1 find the maximum power transferred to the load.

 9 W.
 15.247 W.
 4.547 W.
 1.875 W.

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Electric Circuits
Which material has extremely large resistance?

None of these
 Semiconductor
 Conductor
 Insulator

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Electric Circuits
A 10 μF capacitor and 100 W, 220 V lamp is connected in series across a 220 V alternating supply. In which frequency of the supply the lamp will glow brightest?

 1 Hz.
 100 Hz.
 10 Hz.
 1000 Hz.

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Electric Circuits
Three resistances have the following ratings 150 Ω at 5 %, 100 Ω at 5 % and 200 Ω at 5 % respectively. The percentage error when all the three are connected in series will be

  + 5 %.
  + 6 %.
 + 7 %.
 + 8 %.

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