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Electric Circuits

Electric Circuits
The value of unity impulse function at time (t) = 0 is

 indeterminate.
 1.
 infinite.
 0.

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Electric Circuits
Which property is used to oppose the flow of current ?

 Poteintial difference
 Capacitance
 Inductance
 Resistance

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

 2 V.
 1.9 V.
 2.5 V.
 2.7 V.

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Electric Circuits
A 100 μF capacitor supplied from 3 V source with a frequency of 50 Hz. The capacitive reactance is

 7.96 Ω.
 15.92 Ω.
 63.68 Ω.
 31.84 Ω.

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Electric Circuits
Which material has extremely large resistance?

 Semiconductor
 Conductor
 Insulator
None of these

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Electric Circuits
In a capacitive circuit, the capacitive reactance is

 indirectly proportional to frequency
 directly proportional to frequency
 directly proportional to the square of frequency
 indirectly proportional to the square of frequency

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