18: AC Flashcards
1
Q
Define AC
A
An alternating current refers to a current which changes direction periodically with time
2
Q
Define RMS Current
A
RMS current refers to a steady current which dissipates heat at the same average rate as the Alternating current in the same resistive load.
3
Q
How to find RMS current
A
RMS current = SQRT(AREA UNDER CURRENT SQUARED-TIME GRAPH FOR ONE PERIOD/PERIOD)
or: rms current = max current/sqrt(2)
