I was relaxing in my sofa when I heard a pop. Then a clack. Then a beep.

I had forgotten to turn off the stove when removing a pot from it and my rice cooker's power cable dropped onto it. I suppose the first pop was the cable igniting. The clack was the breaker tripping and the beep was my UPS turning on. Nobody was hurt.

Resistance increases with heat. My power outlets supply 220~240 volts. Since I = V / R, the increased heat and resistance in the rice cooker's power cable should have decreased the current, if the outlet voltage is constant. Or, is it so that the system actually tries to compensate with more voltage within some range set by my electricity supplier? Or, was it something else entirely that tripped the breaker?

Please teach me! 😊