ll. Participle 1. As an attribute 铜是广泛使用的导体。 Copper is a widely used conductor. A capacitor is a device consisting of two conductors separated by a non-conductor. Yellow added to blue produces white light A lamp connected across a dry cell is an example of a simple electric circuit.II. Participle 1. As an attribute 铜是广泛使用的导体。 Copper is a widely used conductor. A capacitor is a device consisting of two conductors separated by a non-conductor. Yellow added to blue produces white light. A lamp connected across a dry cell is an example of a simple electric circuit