Recent content by Porter22

That worked, and i checked it with an analog ammeter And its a ceramic variable resistor that said it is 25 W so i think I am good but ill check it for short bursts.

I got variable 25 W resistor, and set it to 6.0 ohms. Which should give 2 A of current and 24 W power through the resistor. I'm currently reading 0.28 A at 12 V... Whats going on here? If I measure the resistance of the entire circuit I'm getting 0.685k Ohms which would give .0175 Amp. which...

i made a speaker from a cup, a coil of wire and a magnet. I hooked up both of the ends of the wire to a headphone jack and it works. Albeit very low sound, but it works. Can you point me in the direction of some equations that will show me the most influential factors on how to make it louder...

If you can clarify the problem statement: I understand, there is a sloped surface at an angle inclined 30 degrees above horizontal. There is a mass of 3.00 kg. The box slides down 2.00m and takes 1.5 seconds to do so. Can we assume they are increasing the mass, it was static and not moving as...

I like Physics, I like electricity, I am a student of science.

Also what kind of batteries could I use (in short bursts to avoid battery malfunction) to measure high A in discharge?

] I attached a pic of the PSU.. I have done some calculations assuming (generously and for simplicity, i think) that the wire has .3ohms. So at 3V, shouldn't i be getting 10 A? I understand there may be "short-circuit" prevention elements in this PSU. Is this what you're talking about?This...

I have a 2 AMP regulated DC power supply, with variable voltage 3 - 12 v. If in a small circuit, i.e, small copper wire with 1 ohm resistor. Why am i not getting at max Amps?