Learning Outcomes:

● describe current, potential difference and resistance of an electrical system, stating their SI units

● describe the applications of chemical, heating and magnetic effects of an electric current

● explain what is meant by power, relate it to an output of an electrical system, stating its SI unit

● state how changes made to an electrical system can cause some electrical hazards

● state some precautionary measures to ensure the safe use of electricity in the home

● draw and interpret circuit diagrams and set up circuits containing electrical sources, switches, lamps, resistors (fixed and variable), ammeters and voltmeters

● *investigate the effect of varying resistance on the current in the circuit using fixed or variable resistors (Note: formula V=IR is not required)

● *investigate how series or parallel arrangement of fixed resistors affects the current as an output of the system

● *calculate the cost of using electrical appliances, using kilowatt-hour as a unit of electrical energy consumption

● show an awareness of ways to conserve electrical energy in our households