Recent content by i0n

Hi I'm doing a report on microwave ovens and we have to include relevant equations in our reports. I've seen this on: http://www.lsbu.ac.uk/water/microwave.html and I've tried to use it to solve for Emax since (i think) i know the others, e.g. 4000v is applied across the magnetron so I am...

The microwave is roughly a year old and is 900watts. I think due to the manufacturing process, there is more sugars or fats in the centre of the icecream tub, which causes the strange phenomena!

no man, I know how a microwave works but this has been puzzling me for ages and I experience it every time i heat up icecream. It's so wierd.

I put icecream in my microwave for about 20 seconds. When i take it out i notice that it's softest in the centre. However, when i defrost a loaf of bread it's always softest on the outside and still cold in the centre. Why is this, and if you don't believe me try it!

Hi I am doing a report on electrostatic force. It involves 2 steel plates which are connected to a 5kV DC power supply and are separated 8cm from each other. A table tennis ball painted in metallic paint (to conduct) is hung from a nylon wire between the two plates. When the power supply is...

maybe it was lower, but I am just wondering what the advantages are of having a higher capacitance but the same p.d. on 2 different capacitors?

Im looking at buying a capacitor on the internet for this project. I need a 6000v capacitor and I've seen a huge variety in prices. The ones with higher farad values seem to be more expensive. Why is this, e.g. a 40kv 1pF capacitor is 6$ whereas a 10kv 0.1F capacitor is 70$!

i see, thanks. So would a van derr Graff generator produce EMP that could be heard on a radio?

Hi, i live in the UK and currently studying physics at A-level. I have chosen to investigate EMP and its effect on electrical systems for a project. How would i build a generator? Am i right in saying all i would need is a fairly large capacitor and a spark gap? What sized voltage are we talking...