Sparklefly
New Member
Hi everyone. I'm hoping you can help my son and I with a problem that we're having.
We're making an electromagnet for his science fair project and testing how differing voltages make the magnet stronger and weaker. I think our biggest problem is having trouble converting ohms and watts and amps and volts and really, honestly, just not having a damn clue what we're doing.
We're using 8 size D batteries (1.5 volts each), running the current through an on/off switch and into a potentiometer to control the current. We got one and promptly blew it up. So we have just purchased another potentiometer and it says it's a "500K ohm". Are we about to blow this SOB up, too?
Any help would be appreciated.
We're making an electromagnet for his science fair project and testing how differing voltages make the magnet stronger and weaker. I think our biggest problem is having trouble converting ohms and watts and amps and volts and really, honestly, just not having a damn clue what we're doing.
We're using 8 size D batteries (1.5 volts each), running the current through an on/off switch and into a potentiometer to control the current. We got one and promptly blew it up. So we have just purchased another potentiometer and it says it's a "500K ohm". Are we about to blow this SOB up, too?
Any help would be appreciated.