A diagram of the voltage across a capacitor and resistor (blue) during repeated charging-discharging by a square wave input voltage (red), with a period 20ms and a peak voltage of 5V. The time constant, <i>τ</i> is approximately 1.2ms. Th
<ul><li><a href="//commons.wikimedia.org/wiki/File:Capacitor_Square_wave_charge-discharge.svg" title="File:Capacitor Square wave charge-discharge.svg">Capacitor_Square_wave_charge-discharge.svg</a>: inductiveload</li>
<li>derivative work: <a href="//commons.wikimedia.org/wiki/User:Cepheiden" title="User:Cepheiden">Cepheiden</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Cepheiden" title="User talk:Cepheiden"><span class="signature-talk">talk</span></a>)</li></ul>
<ul><li><a href="//commons.wikimedia.org/wiki/File:Capacitor_Square_wave_charge-discharge.svg" title="File:Capacitor Square wave charge-discharge.svg">Capacitor_Square_wave_charge-discharge.svg</a></li></ul>