Electronic Principles
What form of energy is used for creating static electricity?

Chemical energy
None of these
Solar energy
Light energy
Mechanical energy

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Electronic Principles
The total impedance of a parallel RLC circuit:

always increases as the applied frequency increases
None of these
always decreases as the applied frequency increases
is equal to the sum of the values of resistance, inductive reactance and capacitive reactance
is maximum at the resonant frequency

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Electronic Principles
Which one of the following statements most accurately reflects the nature of ac power?

The current in an ac circuit flows in one direction at a steady level
The current in an ac circuit changes direction periodically
The current in an ac circuit flows in one direction, but changes value periodically
The current in an ac circuit flows in two directions at the same time
None of these

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