Experiment to show that current leads voltage by 90 degrees in capacitor (Using RC circuit and Oscilloscope)

Good video. I like the mention of the ground lead connection.

Thanks!

I get a good laugh out of half melted ground leads on oscilloscopes.

** If the presenter had simply used an analogue scope - he could have employed a Lissajous pattern to prove the fact is a few seconds. In phase = diagonal line 45 degree shift ( -3db_) = ellipse. 90 degree = circle.

..... Phil

Ah! the memories - back in school in the 1960's, baffling the physics teacher by hooking up the sig. gens to not only the front X input but the Y input at the back - and another on the Z input to get travelling spots.

Aaah! Those old times.... I used x,y input, to put text on a scope screen, with 2 dao's from an ordinary 80-286 computer. Worked fine. just visit each point which needed licht, movement from one point to the next, was fast enough to only show as dark lines,

Lovely - but in the late 1960's the school I was at didn't have a computer :-)

But back in the 40's scopes, well CRTs, were used as RAM for some of the first progammable computers.

When did they stop making those memory CRT tubes for scopes and raster display for old computers?

correction, vector displays.