This apparatus is an improvement over the conventional apparatus to show the effects
of vibrations in a stretched cord and examine the relationship between frequency, tension and density. A thin steel
rod is
clamped near one end through two 4 mm socket terminals. This rod passes through the centre of a small solenoid
and between
the poles of a magnet. Adjustable contact points fitted through a second pair of 4 mm socket terminals
make alternating
connection with an adjustable contact on the rod. The rod has a small hole at one end for the
attachment of thread which
passes over a pulley mounted on a bench clamp and supports a scale pan, 75 mm diameter.
Supplied complete with pulley with
clamp and scale pan.
