Electronic Principles
Suppose a voltage source has an ideal voltage of 12V and an internal resistance of 0.5W. For what values of load resistance will the voltage source appear stiff?

None of these
100 Ohm
5 Ohm
6 Ohm
50 Ohm or more

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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
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
None of these

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Electronic Principles
Which one of the following is a direct statement of Ohm's law?

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

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Electronic Principles
What is a negative ion?

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

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