G9 Unit 6 Electricity

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What is an Electric Current?Definition:An electric current as therate of flow of chargesthrough conductor.
Electric Charges• Electric charges are made up of positive charges (protons)and negative charges (electrons).• When these charges flow in a circuit, a current is produced.
Page 1 and 2: Unit 6:Electricity
Page 3 and 4: What is Electricity?Definition:Elec
Page 5 and 6: Kinds of ElectricityCurrent• The
Page 7: How does an Electrical Appliance Wo
Page 11 and 12: Electrical QuantityElectric Current
Page 13 and 14: How to Measure Current?• The SI u
Page 16 and 17: Direct Current (DC)• An electricc
Page 18 and 19: Electrical Potential Difference or
Page 21 and 22: Resistance• When an electric curr
Page 23: Resistance• The SI unit forresist
Page 33: 24
Page 36 and 37: Ohm’s Law• The current that flo
Page 38 and 39: Chart
Page 40 and 41: Sample Problem 1:Find the current t
Page 42 and 43: Find the applied voltage of a circu
Page 44 and 45: Sample Problem 5A light bulb uses 2
Page 50 and 51: Electrical Circuitsand Connections
Page 52 and 53: Open and Closed CircuitClosed Circu
Page 54 and 55: Components Found in an Electric Cir
Page 56 and 57: • A switch is an electrical compo
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• Bulb• Variable resistor (rheo
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Workbook p. 160
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Series Circuit•Series Circuit - a
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Voltage drop•As each device in se
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Sample Problem 1A series circuit co
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Determine the (a) totalresistance o
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The circuit shown contains a 9-volt
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4. Solution- part 2- Use resistance
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• Determined the total current in
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Sample Problem 5:• Determined the
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Parallel Circuits•In parallel cir
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Parallel Circuit Calculation Rules
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1R t= 1 R 1+ 1 R 2+ 1 R 31R t=1+ 1+
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Sample Problem 1•Find the total c
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Solving Problem 2:1. Looking for:-
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Calculations ofElectrical Energy an
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• Power is measured in watts (W).
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Sample Problem 1:• Samson spends
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Sample Problem 3:• A consumer use
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Calculation of Electricity Cost in
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Sample Problem 1:A household which
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Importance of SafetyPrecaution in t
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Three possible dangers in electrici
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Three possible dangers in electrici
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• Earth wire - a safety wireand c
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• Circuit breakers- Miniature Cir
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Earth Leakage Circuit Breaker (ELCB
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G9 Unit 6 Electricity

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