OUTCOME
By the end of the lesson you will be able to recognise series and parallel circuits and be able to calculate to solve a series and parallel circuits for current, voltage and resistance
Engage
Parallel resistors are when the resistors are in different branches of the same circuit.
1/Rt = 1/R1 + 1/R2 + ...
Resistors arranged in series result in an effective resistance as the sum of the series resistors
LEARNING TASKS
Explain
Watch this screencast about effective resistance of a circuit and this one about resistors in series
Watch these screencasts about working out the effective resistors with parallel resistors: part 1 and part 2.
You can watch this screencast about working out the effective resistance of a compound circuit with resistors in series and parallel.
To see how to use OHMs LAW to solve problems in compound circuits, watch this screencast part 1 and part 2
Explore and elaborate
Use PhET circuit builder to build a circuits to solve a circuit for effective resistance, current and voltage.
Evaluate
Try questions 4 through to 17 from the text (page 82)
Extra series and parallel questions
next lesson's Reading p. 121-126