rheostat

Hi everyone, Quick question: can we use a rheostat on our 5v 200a DC Power supply? We're doing electroforming and would like to start our acid copper baths at 2V before we put a piece in the tank, and then turn it up to 5V once the piece is fully submerged. Can we regulate the powersupply with a...

Hi guys, this is my first post and last resort. My company recently acquired 2 rheostat dimmers. I'm trying to figure out what the max load is so I can start sending them out on jobs. What's the best way to do this? Thanks you so much for any help you can provide!

Hey I'm new to this website and have a few quick questions. I'm wiring a potentiometer into the circuitry for a heated snowboard boot I'm designing. I'm just curious how you calculate the maximum current and voltage you can run through it without frying it. I'm using 6 3.7V 1500mA lithium-Ion...