OUTCOME
By the end of the lesson you will be able to apply find the effective resistance of parallel combinations of resistors and solve parallel circuits
Engage
Parallel resistors are when the resistors are in different branches of the same circuit.
1/Rt = 1/R1 + 1/R2 + ...
LEARNING TASKS
Explain
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 the PhET circuit builder to mnodel the prac and to solve other circuits for effective resistance
Evaluate
Answer all the questions from the prac
Try Qs 10-16
Next lesson's Reading p.77-78