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Updated: May 23, 2025
When a current is flowing through a circuit the material of which the wire is made not only opposes its passage this is called its ohmic resistance but a counter-electromotive force to the current is set up due to the inductive effects of the current on itself and this is called impedance.
Where two or more headsets are used with one wireless receiving set they must all be of the same resistance and connected in series, that is, the coils of one head set are connected with the coils of the next head set and so on to form a continuous circuit. The Impedance of Headphones.
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