Unit 7

4. (2words) phenomenon where heat is produced as electrons move through a conductor or load device.
8. a material that does not let electric current flow through it.
9. (2words) starts with a V. difference in electrical energy between two points
10. (2words) “The current in a circuit is directly proportional to the electric potential difference impressed across its ends and inversely proportional to the total resistance offered by the external circuit.”
13. opposition to the flow of the electric current.
15. (2 words) flow of electrons from one atom to another inside a conductive material.
17. (2words) occurs when the electric current is transported by the wires without passing through a load device.
18. (3words) control device that changes the status of a circuit to one of two possible ones.
20. (2words) a series of interconnected components that an electric current flows through to produce an effect
21. Circuits are controlled by _____________ that open and close the circuit when they are pressed

1. (2words Components that supply the necessary electrical energy to the rest of the circuit in order to move the electrons
2. (2words) control device that opens or closes the circuit but only while the button is pushed.
3. (2words) a type of circutit where the energy of the power source cannot reach the load devices,
5. (2words) Components that receive the electrical energy from the power sources and convert it to other types of useful energy.
6. (3words) control device that opens or closes the circuit when it is pressed.
7. (2words) a phenomenon caused by the accumulation of charge in a material.
11. a material that lets electric current flow through it.
12. amount of electrons flowing through a conductor over a certain time.
14. (2words) Devices that regulate the circuit
16. (2words) a type of circuit where the energy of the power source reaches the load devices
19. a form of energy that lets negatively charged particles (electrons) move from one atom to another.