Recent content by Umar Awan

Say I have got a super cooled cylinder of half hydrogen and half helium. This cylinder has a pressure of 100,000 Pascal's. At this pressure, hydrogen boils at 20 Kelvin and helium at 4.21 Kelvin. I hope to separate helium by cooling gas down to 4.21 Kelvin but I know that even at the...

Also Tom. [O]G. Great stuff this temperature coefficient of resistance table. [Like emogy]

Guys Thank you! All of you. This has probably been the most productive discussion of my life. Now I have another question going on in my head: The reason we use a high current transformer is because plugging a low resistance heating element directly into a power supply( e.g. 1 ohm), will pull a...

Refering to my earlier reply to you. I just experimented with parameters set by my requirements and my afore mentioned requirements and I noticed that with 57.6 output voltage, I could get an output of 18 amperes. These many amperes would be sufficient to provide 1036.8 Watts (Taken formulate...

Thank you!*I mean it!* My "mc delta t" 's and "p=j/s" 's give me a power requirement of 1030 watts... My calculation of the resistance(Its a very thin foil) of the tungsten foil gives me a value of 3.2 ohms resistance. I also need to heat this foil to about 1050 celsius in about 3 minutes...

In a transformers output, is it the current that is fixed or the voltage? I have been trying to resisitively heat some tungsten foil and I am stuck at trying to find out the amount of current I need in my transformers output. The problem I am facing is that I know that the tungsten resistivity...

Note: I have a feeling this is below Electrical Engineering requirements, but I couldn't find a more suitable category, so I think I'll extort the advantages of a forum base with electrical understanding more than I think may be required(ofcoarse I know very little about the field, so I may fall...