Electric power - lesson 1
OUTCOME
By the end of the lesson you will recognise and explain the workings of a DC motor and meters such as volt and ammeters.
A DC motor uses the magnetic force on coils of wire to create rotation that can then be used to perform mechanical work.
A charged particle will be deflect by a magnet field. The size of the force causing the deflection can be found using F = qvB and the direction can be determined using the RH rule
LEARNING TASKS
Explain
1. Why does the motor require a commutator to work?
Examine this DC motor Applet
Examine this second DC motor Applet
Evaluate
(Hein) 24 - 40
Jacaranda - p. 105 pp6
p. 107-108, every second.