Today’s Agenda…11/17

1. Today’s Agenda…11/17 • Bellringer: Worksheet • Review Note-taking Worksheet & Discuss • Notes on Electric Current Part I

2. Electric Current Part I Study Pack #10

3. Review • A material through which electrons can move easily is a _____. • A. conductor • B. insulator • C. nucleus • D. electromagnetic

4. Review • Each of the following is an example of an insulator except _____. • A. wood • B. copper • C. glass • D. rubber

5. Review • An atom has equal numbers of protons and _____. • Neutrons • Electrons • Ohms • Volts

6. Review • Every proton and electron is surrounded by a(n) _____. • A. electric circuit • B. electric field • C. insulator • D. magnetic pole

7. Today’s Goals… • I can describe how an electric current flows. • I can explain how electrical energy is transferred in a circuit. • Study Pack #10 • Page 201

8. What do you know? • True or False • In a wire there is an electric current when protons in the wire move along the wire. • The unit for electric current is the ampere. • Electric currents will flow when a switch is open. • Batteries can produce an electric field that makes electric charges flow.

9. What is an electrical current? • The flow of electrical charges • Electrons move along the wire

10. Unit for Current • The amount of electrical current in a wire is the amount of charge that flows into and out of the wire every second • The unit for current is the ampere, A • 1 ampere of electric current means about six billion billion electrons flowing into and out of the wire every second

11. A Simple Electric Current • Electric energy can be transformed into heat, light, and sound energy • To watch tv energy must be constantly transformed • The electric current must be kept flowing

12. A Simple Electric Current • Electric current will flow continually in a CLOSED path called an electrical circuit

13. A Simple Electric Circuit • An electrical circuit is made up of: • wire, which connects the parts together • an energy source, such as a battery • a receiver, such as a fan, lightbulb, or motor • a switch (not required)

14. A Simple Electric Current • Current flows as long as the switch is closed • When the switch is open, current no longer flows • If one of the wires are cut or the light bulb is unscrewed the current will not flow

15. Making Electric Charges Flow • A force must be exerted on electric charges to make them flow • Force is exerted on an electric charge by an electric field • There is an electric field in the circuit that will move electrons in a single direction

16. Making Electric Charges Flow • A battery can produce an electric field • Electrons flow from the negative end to the positive end

17. What did you learn? • True or False • In a wire there is an electric current when protons in the wire move along the wire. • The unit for electric current is the ampere. • Electric currents will flow when a switch is open. • Batteries can produce an electric field that makes electric charges flow.