Demonstrator holding a loudspeaker over a pile of nuts, showing the power of the magnet it contains as it lifts the nuts. Loudspeakers work by applying a varying electric signal to a coil of wire in the field of a permanent magnet. The varying field causes the coil to move relative to the magnet. Attached to the coil is a paper cone, whose vibrations produce sound in the air. See clip K004 2697 for the loudspeaker in action. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / RHYS LEWIS & MINH TAN PHAM, AHS, DECD, UNISA |
Modell-Rechte: | Derzeit liegt noch kein Release vor. Bitte kontaktieren Sie uns vor Verwendung. |
Länge: | 13 Sekunden |
Seitenverhältnis: | 16:9 |
Restrictions: | - |