Electronic Principles
Which one of the following devices is most often used for measuring opposition to current flow in a circuit?

Ohmmeter
None of these
Ammeter
Voltmeter
Wattmeter

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Electronic Principles
What is the primary difference between primary and secondary cell batteries?

None of these
Primary-cell batteries must be recharged at a much slower rate that secondary-cell batteries
Secondary-cell batteries can be recharged and used many times, whereas primary-cell batteries cannot be properly recharged
Primary-cell batteries use chemical cells, whereas secondary-cell batteries use an alternative energy source, such as thermal or magnetic energy, to supplement their outputs
Primary-cell batteries can be recharged and used many times, whereas secondary-cell batteries cannot be properly recharged

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

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

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