Electronic Principles
A typical light switch in your home is a:

knife switch
momentary push button switch
toggle switch
None of these
rotary switch

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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 repelled by the north pole of another magnet
None of these
that would be attracted to the earths north magnetic pole

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Electronic Principles
Doubling the operating frequency of a purely inductive circuit:

cuts the current through the inductors one-half
None of these
increases the current, but by an amount that can be determined only by doing a complete analysis of the circuit
has no effect on the current through the inductors
doubles the amount of current through the inductors

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