Electronic Principles
Waveforms are graphs that show:

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
amplitude on the vertical axis and frequency on the horizontal axis

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Electronic Principles
One henry of inductance is defined as:

the amount of counter emf required to reduce a current to 1 A
the amount of inductance required to change the frequency of a current by 1 Hz
the number of turns of wire in an inductor multiplied by the amount of current flowing through it
the amount of inductance required for generating 1 V of counter emf when the current changes at the rate of 1 A per second
None of these

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

None of these
The algebraic sum of currents in a loop is equal to zero
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 current through a resistance is proportional to the value of resistance and the IR drop across it

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