Electronic Principles
The rise time of a pulse waveform is the time required for the voltage to rise:

None of these
from zero to its rms value
from zero to its peak value
from 10% of the peak value to 70.7% of the peak value
from 10% of the peak value to 90% of the peak value

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Electronic Principles
When applying a square waveform to a capacitor, the circuit tends to:

None of these
round off both the voltage and current waveforms
peak the voltage and round off the current waveforms
peak the current and round off the voltage waveforms
peak both the voltage and current waveforms

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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
Resistances provide the only opposition to current flow
Combinations of resistance and inductive reactance provide any opposition to current flow
None of these
Inductive reactance provides the only opposition to current flow

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Electronic Principles
What is a free electron?

None of these
An electron that has no electrical charge
An electron that has twice the amount of charge of a normal electron
An electron that has been freed from its parent atom
An electron that costs nothing

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