Electronic Principles
Electron current is flowing through a conductor in a direction you might describe as straight into this page. What is the direction of the resulting magnetic field?

Into this page
Out of this page
None of these
Clockwise
Counterclockwise

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Electronic Principles
Waveforms are graphs that show:

amplitude on the vertical axis and frequency on the horizontal axis
amplitude on the vertical axis and the passage of time on the horizontal axis
None of these
frequency on the vertical axis and amplitude on the horizontal axis
the passage of time on the vertical axis and amplitude on the horizontal axis

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Electronic Principles
The total impedance of a parallel RLC circuit:

is equal to the sum of the values of resistance, inductive reactance and capacitive reactance
always increases as the applied frequency increases
is maximum at the resonant frequency
None of these
always decreases as the applied frequency increases

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Electronic Principles
Which one of the following principles best describes the basic operation of an electromagnet?

Like magnetic poles repel, while unlike poles attract
Current is induced in a conductor that is moving through a magnetic field
None of these
Current flowing through a conductor generates a magnetic field
Like magnetic poles attract, while unlike poles repel

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Electronic Principles
Which one of the following phrases most accurately describes a purely inductive circuit?

The ac voltage lags the current by 90 degree
Combinations of resistance and inductive reactance provide any opposition to current flow
None of these
Resistances provide the only opposition to current flow
Inductive reactance provides the only opposition to current flow

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