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

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

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Electronic Principles
Which one of the following is a direct statement of Ohm's law?

The algebraic sum of currents entering and leaving a point is equal to zero
The algebraic sum of voltages in a loop is equal to zero
None of these
The total resistance of a parallel circuit is less than the value of the smallest resistance
The voltage drop across a resistance is proportional to the value of resistance and the amount of current flowing through it

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Electronic Principles
Which one of the following statements best describes magnetic hysteresis?

Hysteresis is most apparent when the core material is saturated
None of these
Hysteresis is the amount of magnetic flux that is not confined to the core material of an electromagnet
Hysteresis is most apparent when a steady amount of current is lowing through the coil of an electromagnet
Hysteresis is most apparent when the current through the coil of an electromagnet changes frequently

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