An explanation of the difference between direct and alternating current. The clip includes a short historical outline of the work of Thomas Edison and Nikola Tesla. This is followed by an ...

Britain's National Grid on Thursday said it had been awarded two parts of a 59 billion pound($76.36 billion) high voltage ...

Prefrontal transcranial direct current stimulation induced small- to medium-sized clinical effects in cognitive and clinical ...

A direct current flows in only one direction. On a voltage-time graph this would appear as a straight horizontal line at a constant voltage. Car batteries, dry cells and solar cells all provide a ...