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

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

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Electronic Principles
One henry of inductance is defined as:

the amount of counter emf required to reduce a current to 1 A
the amount of inductance required to change the frequency of a current by 1 Hz
the number of turns of wire in an inductor multiplied by the amount of current flowing through it
the amount of inductance required for generating 1 V of counter emf when the current changes at the rate of 1 A per second
None of these

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Electronic Principles
Which one of the following statements applies to common, non-rechargeable flashlight batteries?

Common flashlight batteries are secondary dry-cell batteries
None of these
Common flashlight batteries are primary dry-cell batteries
Common flashlight batteries are primary wet-cell batteries
Common flashlight batteries are secondary wet-cell batteries

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Electronic Principles
What is the difference between a conductor and an insulator?

None of these
An insulator has an excessive number of free electrons, while a conductor has a few free electrons or none at all
The difference between conductors and insulators depends on how they are used
An insulator allows current to flow much easier than a conductor does
A conductor allows current to flow much easier than an insulator does

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