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

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
None of these
from 10% of the peak value to 90% of the peak value

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Electronic Principles
When a series RLC circuit is operating at its resonant frequency:

the difference between inductive and capacitive reactance is equal to the resistance
capacitive reactance is greater than the inductive reactance
None of these
inductive reactance is equal to the capacitive reactance
inductive reactance is greater than the capacitive reactance

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