I built a heating element with a copper coil made of 10 cm of approximately 0.75 mm thick wire. However, when connected to a 12 V power supply, the coil doesn't heat up. There are no short circuits within the coil.
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A copper wire with a diameter of 0.75 mm and a length of 10 cm has a resistance of 0.004 ohm. This follows a current of 3000 amperes at 12 volts. Can’t supply the power supply, so it turns off or smokes off. It’s getting warm.
That makes sense.
Well, the “spoke” is the short circuit. The power supply simply switches off.
10cm wire is not a spool now.
The power supply is already smoked or your heating element needs more power.
However, I suspect that a commercially available power supply is not short-circuit-proof.
I have with my multimeter about that it emits current so lie not
How much power does the power supply?
Did you measure the tension yourself at that time?
yes, a 0.75mm2 wire does not heat up at all. You need 20A up.
12v at max 2A