On Monday, 15 August 2016 19:22:53 UTC+1, Fredxxx wrote:
On 15/08/2016 17:58, harry wrote:
On Monday, 15 August 2016 14:01:41 UTC+1, Dave Plowman (News) wrote:
In article ,
tony sayer wrote:
The current is reversed as it passes under a brush turning it into AC.

No Harry .. thats switched reversed polarity DC...

Well, yes. AC is generally a sine wave. Be good to see how you achieve
that with a switch. Many inverters make a pretty poor job of producing a
sine wave. ;-)

AC can be any wave form.

Ah, so we are now saying DC is a special case of AC.

Indeed it can be regarded thus.
The frequency in this case is zero.