Electronic Principles
Which one of the following properties of a magnetic circuit can be directly compared to voltage in an electrical circuit?

Flux density
Magnetomotive force
Reluctance
None of these
Number of lines of force

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Electronic Principles
Which one of the following phrases best describes residual magnetism?

The circular magnetic field that surrounds a conductor carrying a current
The amount of magnetic flux that is not confined to the core material of an electromagnet
The force of attraction between the poles of a permanent and temporary magnetic field
None of these
Magnetism that remains in the core of an electromagnet after the current through the coil is turned off

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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 total voltage multiplied by the total resistance
None of these
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 sum of the currents flowing through the individual components in the circuit

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Electronic Principles
The north pole of a magnet is the one:

None of these
that has its molecules arranged in a random pattern
that would be attracted to the earth's south magnetic pole
that would be repelled by the south pole of another magnet
that would be attracted to the earth's north magnetic pole

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