Current Electricity http www bing comvideossearch qBillNye3 aCurrentElectricityFORMHDRSC

Current Electricity http: //www. bing. com/videos/search? q=Bill+Nye%3 a+Current+Electricity&FORM=HDRSC 3#view=detail&mid=0 AE 4 B 02 BBE 26 ECAD 673 50 AE 4 B 02 BBE 26 ECAD 6735 (20 min) • Electric current is a flow of electric charge. • Electrons moving in a conductor such as a copper wire. • Ions through an electrolyte • Battery or salt solution

CONDUCTORS AND INSULATORS • Conductors allow electrons to flow through them easily. Cu • Copper atom has one valence electron. • Valence electrons of conductors can gain enough energy to break away and become free electrons. • Free electrons can move from one atom to another. http: //www. ndted. org/Education. Resources/High. School/Electricity/valencesh ell. htm

CONDUCTORS AND INSULATORS • Insulators do not allow electrons to • Insulators can flow through them easily. protect us from electric shock • They are materials that do not have any free electrons. • They do not make good conductors of electrical currents. • Ex wood, plastic, rubber, noble gases

Electric Circuit: • A continuous path in which electric current will flow. • Example: current flowing from the power source, through a copper wire to a light bulb, and back to the power source. • Batteries have many electrons at one end (-ve) and few at the other (+ve). • The electrons want to balance this charge but they need a conductive path for them to travel through.

Electric Circuit: • If the (+ve) & (-ve) sides of the battery are connected by a conductor, electrical current will flow as the electrons move from the (-ve) side to the (+ve )side. (+) (-)

Components of a Simple Circuit: 1. Source of electrical energy: • (ie: a battery) 2. Electrical load: • Anything that converts electrical energy to another form of energy (ie: toaster converts electrical energy to heat) 3. Circuit control device: • (ie: a switch, a timer) 4. Connectors: • wires that connect the components of a circuit together • Schematic Diagram of a simple circuit: (copy table 4 on p 606 into notes)

CURRENT ELECTRICITY: http: //www. youtube. com/watch? v=5 la. Tkj. INHrg (10 min) (intro current, coulomb) – Introducing Current Electricity: – Read page 507 -509 Answer # 2 -6 page 510 – Electric Current: – Read page 556 -557 Answer # 1 -3 page 557 – Potential Difference: – Read page 560 -561 Answer # 2 -4 page 561

Electric Current: • Electric current (I) is the amount of electric charge (Q) that pass a given point in a conducting wire every second(t). Q I= t • I is measured in SI units called amperes (A). • Q is measured in coulombs (C). – A coulomb is the charge carried by 6. 25 x 1018 electrons • t is measured in seconds (s) • An Ammeter: Is a device used to measure the electric current. ]

Potential Difference: • Electric potential difference is the difference in potential energy (E) per unit charge (Q) at one point of the circuit compared to another point in the circuit. • SI Unit: Volt (V) E V= Q • A Voltmeter: Is a device used to measure the electrical potential difference.

Potential Difference: • POTENTIAL DIFFERENCE: http: //www. youtube. com/watch? v=F 1 p 3 fgb. Dnk. Y • (10 min) Https: //www. youtube. com/watch? v=l 8 JS 8 Bbr. VOg (4 min)