Exam date: June 27th 2006
what you need to revise

Module 23 – Physics in Action

• interpreting the behaviour of control circuits represented in the form of input sensor
processor
output device;
• representing the behaviour of logic gates by means of truth tables
• explaining the operation of a potential divider and its use in input sensors;
• investigating the charging and discharging of capacitors (and, for Higher Tier,exploring their use as timers in electronic circuits)
• comparing the behaviour of converging and diverging lenses; and, for Higher Tier students,explaining the behaviour of a light dependent switch in terms of the components shown using symbols in a standard circuit diagram;
• considering the advantages and disadvantages of electronic control systems;
• using ray diagrams to explain the image formation of real and virtual images by a converging lens.