A phenomenon called self-induction is at work here: as the current oscillates, the magnetic field around the wire changes, too, inducing voltages that slow the oscillation.
A phenomenon called self-induction is at work here: as the current oscillates, the magnetic field around the wire changes, too, inducing voltages that slow the oscillation.
这里运用了一种「自感现象」：当电流振盪时，金属线周围的磁场也会改变，产生使振盪减慢的电压。