Hearing the Field 197
Figure 13.1
Faraday ’ s palm-sized demonstration of electromagnetic rotation (1821). An electric current passes through the
apparatus via liquid mercury (at the bottom of the tube), setting the rod into rotation.
Hearing the Field 197
Figure 13.1
Faraday ’ s palm-sized demonstration of electromagnetic rotation (1821). An electric current passes through the
apparatus via liquid mercury (at the bottom of the tube), setting the rod into rotation.