When it comes to electrical circuits, there’s a lot to remember and understand. We've got you covered with this Intro to Circuits BBC Bitesize guide.

Smoothing condensers and inductances convert the thyratron unidirectional current pulses into steady direct current and suppressing circuits eliminate radio interference from these pulses.

THE ordinary dynamometer is as well adapted for direct as for alternate current measurements; but while it is generally regarded as the best available instrument for alternate currents, its use ...