This is alternating current or ac. The output of an alternator can be ... field increasing the number of turns on the coil The diagram shows four different positions of the coil in an alternator ...

November 18, 2008 A micron-scale generator that uses zinc oxide wires ... Zinc oxide generates electric potential when put under mechanical stress, in a phenomenon known as the piezoelectric ...

increasing the rate of rotation increasing the strength of the magnetic field increasing the number of turns on the coil The diagram shows four different positions of the coil in a dynamo ...