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

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

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Electronic Principles
Which one of the following statements is true for resistance in a parallel circuit?

None of these
The total resistance is equal to the sum of the individual resistances in a parallel circuit.
The total resistance of a parallel circuit is equal to the total voltage
The total resistance in a parallel circuit is equal to the average value of the individual resistances
The total resistance of a parallel circuit is always less than the value of the smallest resistance

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Electronic Principles
Which one of the following statements is true for the currents in a parallel RL circuit?

The current always has the same amplitude and phase for every part of the circuit
The total current is equal to the sum of the currents through the resistance and inductance
The total current is less than the sum of the currents through the resistance and inductance
None of these
The total current leads the total voltage by less than 90

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Electronic Principles
When applying a square waveform to a capacitor, the circuit tends to:

peak both the voltage and current waveforms
None of these
round off both the voltage and current waveforms
peak the current and round off the voltage waveforms
peak the voltage and round off the current waveforms

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Electronic Principles
Which one of the following statements applies to common auto batteries?

Auto batteries are primary dry-cell batteries
None of these
Auto batteries are secondary wet-cell batteries
Auto batteries are primary wet-cell batteries
Auto batteries are secondary dry-cell batteries

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