i am doing some research on java applet simulation on DC motor and AC generator.
http://www.walter-fendt.de/ph11e/generator_e.htm
show an interesting animation of the Dc voltage that resembled a full wave rectification. is that correct?
i thought it will be a constant voltage.

the reason is
i am trying to create a Voltage vs time graph for http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=1266 and i am puzzled what shape it will be like?

ohm law V =IR,
during closed circuit,
if I is constant, and R is a fixed quantity across the split ring, should V is constant?
during open circuit,
I = 0, imply V = V as it is the voltage of the battery
so is it a constant line of voltage V = battery emf?

or is the physics of electromagnetic induction at the loop more complex that and i forgot to consider?

thanks for reply ;D