Things you need to Things you need to know…know…About the electricity and magnetism About the electricity and magnetism Unit TestUnit Test

Atoms and the type of charge the Atoms and the type of charge the particles have. particles have.

Static electricityStatic electricity Conduction and inductionConduction and induction Current – amps – (I) – the amount of Current – amps – (I) – the amount of

charged particles (e-) flowing past a point charged particles (e-) flowing past a point in the wire each secondin the wire each second

Voltage – volts – (V) – the amount of Voltage – volts – (V) – the amount of electrical energy each particle haselectrical energy each particle has

Load – converts electrical energy into Load – converts electrical energy into other forms of energyother forms of energy

Conductors, insulators, and Conductors, insulators, and superconductorssuperconductors

Voltmeters and ammeters – what they Voltmeters and ammeters – what they measure and how they are hooked up.measure and how they are hooked up.

Dry cells and wet cellsDry cells and wet cells Dry cells have two electrodes and an electrolytic Dry cells have two electrodes and an electrolytic

“paste.”“paste.” Wet cells have two electrodes and a liquid Wet cells have two electrodes and a liquid

electrolyte. The liquid is an acid.electrolyte. The liquid is an acid. Primary cells are batteries that Primary cells are batteries that cannotcannot be recharged be recharged Secondary cells are batteries that Secondary cells are batteries that cancan be recharged be recharged

Dry cells and wet cellsDry cells and wet cells Electrochemical cells convert chemical energy into Electrochemical cells convert chemical energy into

electrical energyelectrical energy Cells connected together form a battery Cells connected together form a battery The two electrodes The two electrodes mustmust be made of different be made of different

metalsmetals

Resistance – Ohms – (R) – reduction of Resistance – Ohms – (R) – reduction of the current in a circuit. (the current in a circuit. (ΏΏ))

Ohm’s Law – bring a calculatorOhm’s Law – bring a calculator Schematic symbols – know someSchematic symbols – know some Series and parallel circuits Series and parallel circuits Direct and alternating currentDirect and alternating current

MagnetismMagnetism DomainsDomains Ferromagnetic metalsFerromagnetic metals Magnetic fieldsMagnetic fields 1st and 21st and 2ndnd left-hand rules left-hand rules

Generators – convert mechanical energy Generators – convert mechanical energy into electrical energyinto electrical energy

Electric motors – convert electrical Electric motors – convert electrical energy into mechanical energyenergy into mechanical energy

The power formula P = I x VThe power formula P = I x V Watts – power rating – means joules Watts – power rating – means joules

used per secondused per second The energy formula E = P x tThe energy formula E = P x t Joules, kilojoules, secondsJoules, kilojoules, seconds The Kilowatt hour – uses kilowatts and The Kilowatt hour – uses kilowatts and

hours instead of watts and secondshours instead of watts and seconds

Step-up and step-down transformersStep-up and step-down transformers The Law of electric chargesThe Law of electric charges

Opposites attractOpposites attract Like repelsLike repels Neutral is attracted to chargedNeutral is attracted to charged

The EnerGuide label – tells how much The EnerGuide label – tells how much energy the appliance will consume, on energy the appliance will consume, on average.average.

Remember to bring a pencil, a calculator, Remember to bring a pencil, a calculator, and an eraser.and an eraser.

Go over your notes and look through the Go over your notes and look through the textbook.textbook.

Good luck Good luck