7 Jun
2010
7 Jun
'10
12:23 p.m.
Phill Harvey-Smith [afra at aurigae.demon.co.uk] wrote:
What
wasn't so
good was that the class brain also plugged the thing into the
socket and
hit the on switch.......at which point there was a loud bang
and a flash
Our resident dunce had previously done the usual tricks (plug
bunsen burner into the water tap etc.) and then moved on to
electricity. The loud bang was when he (somehow) plugged a
12V dc lamp into the mains (it wasn't malicious as such, he genuinely
didn't think it would hurt ...). After that we watched him more
closely, so we were able to intercept his attempt to measure the
internal resistance of the mains connection by the obvious expedient of
switching the multimeter to ohms and plugging it into the
mains ...
Antonio