Final answer:
AC generators produce an output voltage that reverses polarity across the load.
Step-by-step explanation:
AC generators, also known as alternating current generators, produce an output voltage across the load that reverses polarity. This means that the voltage changes direction periodically. AC generators work by rotating a coil in a magnetic field, which induces an electromotive force (emf) in the coil. The emf is given by the equation emf = NABa sin(ωt), where N is the number of coils, A is the area of the coils, B is the strength of the magnetic field,a is the angle between the coil and the magnetic field, and ω is the angular frequency.