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

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

The total voltage of a series circuit is equal to the total current divided by the total resistance
The total voltage is equal to the sum of the individual voltages 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 in a series circuit is always less than the value of the smallest voltage

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

The total current in a series circuit is equal to the sum of the currents flowing through the individual components in the circuit
The amount of current flow through each part of a series circuit can be different, depending on the resistance of each part and the amount of voltage applied to it
The same current flows through every part of a series circuit
The total current in a series circuit is equal to the total voltage multiplied by the total resistance
None of these

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Electronic Principles
What is a free electron?

An electron that has been freed from its parent atom
An electron that has no electrical charge
None of these
An electron that has twice the amount of charge of a normal electron
An electron that costs nothing

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