Science – Electricity & Magnetism Study Guide Name_________________________ Know these definitions: 1. electromagnet- A temporary magnet made up of wire wrapped around a core. 2. conductor- An object that allows electricity to flow. 3. insulator- An object that does not conduct electricity. 4. resistance-The measure of how much a material opposes the flow of currect. 5. parallel circuit-A circuit that has two or more paths that electricity can follow. 6. static electricity-The buildup of charges on an object. 7. series circuit- A circuit that has only one path that electricity can follow. 8. electric field-The space in which an electric force acts. 9. What is a property of matter that causes objects to attract or repel each other? Electric charge 10. What is a characteristic of most electric conductors? Negative charges move easily through them. 11. What are some characteristics of an electromagnet? It is made by wrapping current-carrying wire around an iron core. 12. Which materials make good insulators of electricity? plastics 13. If a burned-out bulb causes all of the lights to fail in a circuit, what might you conclude? It is a series circuit. 14. How does a compass react when it is near an electromagnet? The compass needle turns. 15. A student added another light to an electrical circuit and all the lights became dimmer. What is most likely the cause of the dimmer lights? The circuit is a series circuit.