Electronic Principles
What are the main parts of an atom?

Protons only
Electrons, protons, and ions
Electrons, protons, and neutrons
None of these
Electrons, ions, and neutrons

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Electronic Principles
Which one of the following is a statement of Kirchhoffs current law?

The current through a resistance is proportional to the value of resistance and the IR drop across it
None of these
The total current in a parallel circuit is less than the value of the smallest current
The algebraic sum of currents entering and leaving a point is equal to zero
The algebraic sum of currents in a loop is equal to zero

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Electronic Principles
Which one of the following statements most accurately applies to the frequency of a waveform?

The actual frequency of a sine waveform is 1.41 times the working frequency
The higher the amplitude of a waveform, the higher its frequency
None of these
The longer the period of a waveform, the lower its frequency
Unless specified otherwise, the frequency of a waveform is assumed to be 60 Hz

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

Combinations of resistance and capacitive reactance provide any opposition to current flow
None of these
Resistances provide the only opposition to current flow
Capacitive reactance provides the only opposition to current flow
The ac voltage leads the current by 90 degree

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Electronic Principles
A farad is defined as the amount of capacitance necessary for:

dissipating 1 W of power
changing the voltage on the plates at the rate of 1 V per second when 1 A of current is flowing
None of these
storing 1 V for 1 second
causing an ac phase shift greater than 90 degree

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