updated: Aug 2006

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Unit 4: Electricity

Electricity is familiar to us all, and yet quite mysterious. Is it possible to actually see electricity? In this unit we will look at the fundamentals of current electricity and circuits. Some of this may have been touched in on Grade 9.



Pages in Text


1. Charge, (read the text pages)


435 #1,2
438 #1,2
p444 #2,3,5
read lightning files on website
2. (The three topics above are split into two days)    

AC vs DC,
Safety: fuses, grounding, GFIs,

Ciruits in home;
lesson incomplete

Safety document  
4. Lab: Electrochemical Cells   Cells and batteries assignment
5. Circuits, loads, symbols 446,447 memorize symbols
6. Series, Parallel Circuits;
Kirchoff's laws (V and I in series and parallel)

448 - 451 p 450 #2,3
p 451 #1,2,3,4,8
7. Connecting Meters, measuring V, I
Activity: using analog ammeter & voltmeter
8. Quiz.
Lab: LEDs in series and Parallel
9. Resistance
Ohmís Law. Circuit Analysis

  Resistor Colour Code
10. Ohmís Law Lab: V-I for 4 loads    
11. Resistors in Series and Parallel    
12. Internal EMF
Power, P=IV, kW-hrs, hp
14. Review Summary  

Extra Resources


SPH 3U1 Electricity Assignments:

  1. Scientists: Due Date: _______________
    Choose SIX scientists who made a contribution to our knowledge of electricity. Write down one way in which they contributed to science (electricity or electromagnetism), and one fact about their personal life. i.e. You can have just 2 sentences about each person.
    (12 marks)

  2. Batteries and Cells (see lesson 4) Due Date: _______________

  3. Circuit problem set handed out. Due Date: _______________

  4. Production of Electricity Due Date: _______________
    List at least 7 ways of producing (current) electricity, especially commercial generation of electricity.
    Describe how electricity is produced in each case. Donít write down "electrical generator", describe what turns the generator.
    List at least one advantage and one disadvantage of each method of producing electricity.
    MARKS: 5 marks for each method (however many you come up with). Out of 35 marks.
    DUE: day of unit test.

?? alternatively - assign poster project.


Physics1: Electricity Objectives (or Outcomes)

By the end of this unit the student will be able to

define and describe the concepts and units related to electricity and magnetism (e.g., electric charge, electric current, electric potential, electron flow, magnetic field, electromagnetic induction, energy, power, kilowatt-hour)
describe the two conventions used to denote the direction of movement of electric charge in an electric circuit: (i) conventional electric current [movement of positive charge] and (ii) electron flow [movement of negative charge])
[Most of the following set of electricity objectives are also covered in grade 9 science]
relate current and voltage for a resistor (Ohmís law)
describe how the resistance of a wire depends on its length and cross sectional area
apply the relationships for the rate of heat production in a resistor
identify on a circuit diagram whether resistors are in series or parallel
determine ratios of voltages (currents) across resistors connected in series (parallel)
calculate the equivalent resistance of two or more resistors connected in series and parallel.
calculate the voltage, current, (and power dissipation??) for any network of resistors
calculate terminal voltage, EMF, and internal resistance of a battery with a known current
analyze DC circuits using Ohmís law and Kirchoffís rules
connect and use ammeters and voltmeters correctly
state whether the internal resistance of each meter is high or low
read analog voltmeters and ammeters correctly

Ministry of Education requirement
AP Physics requirement
Teacher's extra requirement

Last updated: Aug 2006