Electronic Principles
Which one of the following statements applies to common auto batteries?

Auto batteries are secondary wet-cell batteries
Auto batteries are primary dry-cell batteries
None of these
Auto batteries are secondary dry-cell batteries
Auto batteries are primary wet-cell batteries

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

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

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Electronic Principles
What is the difference between the kinds of charges for an electron and a proton?

An electron has a positive charge and a proton has no charge
None of these
An electron has a negative charge and a proton has no charge
An electron has a positive charge and a proton has a negative charge
An electron has a negative charge and a proton has a positive charge

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Electronic Principles
In a pure inductor:

ac current lags the voltage by 90 degree
ac current is converted to dc voltage
ac current and voltage are exactly in phase
ac current leads the voltage by 90 degree
None of these

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