👉 A Coulombmeter is a device used to measure electric charges. It consists of a small metal plate with an area marked by a number, and a small sphere on which is placed a resistance element that converts electrical energy into heat. When the plates are separated by a certain distance, the heat generated from the circuit will be transferred to the sphere until it reaches the resistance element, causing it to vibrate and produce a sound. The measurement of the voltage across this resistance element gives the electric charge or