Dynamo Generator A.C.

Description

This new apparatus is designed to enable students to
investigate the properties of an a.c. generator as used in
a bicycle dynamo. A permanent magnet rotates between
metal plates linked to a coil of wire. As the field through
the coil changes a current is induced in the coil and this is
brought out to two 4mm sockets. The unit is transparent
to show all the inner workings and is a convenient hand
held device with a direct drive (no gearing) to the rotating
magnet. The output can be displayed on a centre-zero
moving coil voltmeter or oscilloscope. The output swings
from + to – each revolution and is about 0.5V pk to pk. With
the magnitude varying with speed. SP4-1049