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Electric Circuits

Electric Circuits
The maximum current rating for a 10 k Ω, 0.5 W resistor is

 0.707 mA.
 7.07 mA.
 28.28 mA.
 14.14 mA.

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Electric Circuits
In which of the circuits power factor can be zero?

 capacitive.
 resistive.
 inductive.
 both ‘a’ and ‘b’

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Electric Circuits
Air gap flux density is of the order of

  0.35 - 0.5 T.
  0.65 - 0.9 T.
 0.75 - 0.8 T.
 0.85 - 0.9 T.

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Electric Circuits
An AC voltage of 200 V at 50 Hz is applied to a coil which draws 5 A and dissipates 1000 W. The resistance and impedance of the coil respectively are

 25 Ω and 5 Ω.
 50 Ω and 200 Ω.
 40 Ω and 40 Ω.
 40 Ω and 200 Ω.

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Electric Circuits
What is the frequency of domestic power in India?

 70 Hz.
 50 Hz.
 220 Hz.
 60 Hz.

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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?

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

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