Hi
how do you explain the output (emf vs time) graph of a dc or ac motor in an explicit/detailed manner???
This is what I have in my notes so far:
AC:
Constant connection between rotating coil and external circuit due to split rings
As polarity of induced emf changes with every half-turn of the coilVoltage varies like a sine wave
Current changes direction
DC:
Every half turn, a reversal of connection between coil and external circuit occurs due to split rings
As polarity of induced emf changes with every half turnVoltage in external circuit fluctuates between 0 and maximum allowing current to flow in a constant direction
ALSO, for the bolded/ underlined parts "As polarity of induced emf changes with every half turn" is this applicable to both AC and DC generators? I'm not sure if i typed up my notes incorrectly :/
thanks!!