Electronic Principles
What is the smallest number of polarities required for current flow?

Two - a negative terminal and a positive terminal
None of these
One - a negative terminal
Three - negative, positive and neutral terminals
Four - two negative and two positive

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Electronic Principles
Which one of the following statements is true for voltage in a parallel circuit?

The total voltage is equal to the sum of the voltages across the individual branches in a parallel circuit
The total voltage in a parallel circuit is equal to the average value of the individual voltages
None of these
The total voltage of a parallel circuit is the same as the voltages across each branch
The total voltage in a parallel circuit is always less than the value of the smallest voltage

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

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

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