How does electricity work?
Describe what current is and give its symbol (I) and unit of measurement (amps).
Describe the difference between alternating current (AC) and direct current (DC)
Describe what voltage is and give its symbol (V) and unit of measurement (volts)
Describe what resistance is and give its symbol (R) and unit of measurement (ohms).
Evaluate an analogy that communicates the difference between current, voltage and resistance.
2. How powerful is it?
Connect a circuit to measure voltage, current and calculate resistance.
Identify the sources of error in taking measurements of current and voltage.
Draw a line of best fit from collected data.
Extrapolate and interpolate from a graph.
Recall and use Ohm’s Law: V = IR
Recall and use the formula for Power: P = I x V
3. How does it work?
Safely construct series and parallel circuits that include lights, switches, ammeters, voltmeters, variable resistors and multimeters.
Compare series and parallel circuits with respect to the behaviour of voltage and current.
Compare the use of series and parallel circuits in homes.
Outline how the development of electrical circuits in smartphone technology involved specialist teams from different branches of Science.