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

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

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Electronic Principles
The period of a waveform is:

the time required to complete one full cycle
the number of cycles completed in one second
equal to 0.707 times the peak amplitude
the time required for the voltage to rise from 10% to 90% of the peak amplitude
None of these

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Electronic Principles
Which one of the following statements is true for the voltages in a series RC circuit?

The voltage always has the same amplitude and phase for every part of the circuit
The total voltage is greater than the sum of the voltages across the resistance and capacitance
The total voltage is equal to the sum of the voltages across the resistance and capacitance
The total voltage is less than the sum of the voltages across the resistance and capacitance
None of these

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Electronic Principles
What is a negative ion?

None of these
An atom that contains more protons than electrons
An atom that contains more protons than neutrons
An atom that contains more electrons than protons
An atom that contains more electrons than neutrons

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