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 peak value
from zero to its rms 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
A farad is defined as the amount of capacitance necessary for:

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

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Electronic Principles
Which one of the following statements is true for the currents in a parallel RC circuit?

None of these
The total current is equal to the sum of the currents for the resistance and capacitance
The total current is less than the sum of the currents for the resistance and capacitance
The total current. is greater than the sum of the currents for the resistance and capacitance
The current always has the same amplitude and phase for every part of the circuit

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