Description
Designed to show the effects of vibrations in a stretched
cord, and investigate the relationship between frequency,
tension and density. In addition the provision of electrical
contacts, opened and closed by the vibrating armature,
allow the apparatus to be used as high speed changeover
switch in. Comprises a thin steel rod armature, mounted
in a clamp formed by a pair of 4 mm socket terminals, so
that its free length may be adjusted as desired. An A.C.
energizing coil surrounds the armature and a permanent
magnet provides the necessary magnetic polarization.
SP4-1859
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