Description

Measures the Force Between Conductors
Directly.
It comes with a pair of straight aluminum rods for
measuring the repulsive force between parallel
current-carrying conductors and a pair of plates
for measuring the attractive force between
charged capacitor plates.
A current of 10 to 20A is required to cause sufficient
deflection in the electromagnetic experiment.
Fractional weights are then added to a small pan
attached to the upper conductor rod to return the
balance to its original position, determining the
force between the conductors.
The result may be interpreted to confirm the
dynamic definition of the Ampere or to determine
the permeability of air. The analogous electrostatic
experiment may be used to find the permittivity
of air. From these two values, an indirect estimate
of the speed of light may be made.
Requires a lamp and scale for the optical lever,
fractional weight set for the current experiment,
precise multimeter to measure volts and amps, a
300V variable high voltage source and an AC or
DC current source for 10 to 20A.
Instructions for both experiments are included.
Size of base: 30 x 36cm.
The balance is also available without the capacitor
accessory