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Electric Circuits

Electric Circuits
Active filter consists of

 op-amp and capacitor.
 op-amp.
 capacitor.
 inductor.

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Electric Circuits
The capacitive reactance of an electric circuit is 50 Ohms. The frequency of supply becomes doubled. What is the new capacitive reactance?

 25 Ohms.
 200 Ohms.
 100 Ohms.
 50 Ohms.

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

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

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Electric Circuits
Active materials of a lead acid cell are

 lead peroxide.
 all of above.
 dilute H2SO4.
 spongy lead.

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

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

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Electric Circuits
The capacitive reactance of a capacitor of (1 / 2μF) F at 103 Hz is

 10 6 μF.
 10- 3 μF.
 10- 6 μF.
 10 3 μF.

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MORE MCQ ON Electric Circuits

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