conductor-a substance that readily conducts insulator-a substance that does not readily allow the passage of heat or sound ammeter-an instrument for measuring electric current in amperes. voltmeter- an instrument for measuring electric potential in volts current-a flow of electricity which results from the ordered directional movement of electrically charged particles. potential difference-the difference of electrical potential between two points. ohmic resistor- resistors that have a constant resistance non-ohmic resistor- a resistor that's resistance increases as the current increase power-the capacity or ability to direct or influence the behavior of others or the course of events.
