Dog Turns On Lamp With Its Nose! A capacitance touch lamp works by detecting the tiny changes in electrical charge that occur when you touch its metal surface. The lamp’s body is connected to an electronic circuit that constantly monitors its capacitance - the ability to store a small amount of electric charge. When you touch the lamp, your body (which conducts electricity) acts like a capacitor plate and adds extra capacitance to the circuit. The lamp senses this sudden change and sends a signa