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

None of these
Voltmeter
Ammeter
Wattmeter
Ohmmeter

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Electronic Principles
Which one of the following principles best describes the basic operation of an electromagnet?

Current flowing through a conductor generates a magnetic field
Current is induced in a conductor that is moving through a magnetic field
None of these
Like magnetic poles repel, while unlike poles attract
Like magnetic poles attract, while unlike poles repel

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Electronic Principles
Which one of the following statements is true for voltage in a series circuit?

The total voltage in a series circuit is equal to the average value of the individual voltages
None of these
The total voltage is equal to the sum of the individual voltages in a series circuit
The total voltage in a series circuit is always less than the value of the smallest voltage
The total voltage of a series circuit is equal to the total current divided by the total resistance

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

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
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 can be recharged and used many times, whereas secondary-cell batteries cannot be properly recharged

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