# Today’s Agenda…11/17 Bellringer: Worksheet

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

Electric Current Part I
Study Pack #10

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

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

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

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

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

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.

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

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

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

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

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)

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

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

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

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.