We have done several experiments over the past few weeks to learn more about how simple circuits work. You have created a circuit using just a battery, globe and two wires and then constructed your own switch to turn the globe on and off. You then constructed your own torch from two batteries, a globe, cardboard tube, wires, aluminium foil, drawing pins, paper clips and sticky tape. Many of you were able to operate your torch using just one hand – great work! Unfortunately, we were unable to create a circuit with enough voltage to allow a small LED globe to operate using lemons.
We then looked at series (one pathway for the current to flow) and parallel circuits (more than one pathway for the current to flow). We learnt about ammeters and voltmeters and how they are connected. An ammeter measures current in amperes and is connected in series. A voltmeter measures voltage in volts and is connected in parallel across the load (globe, buzzer or other device). Find out more about series and parallel circuits at BBC Bitesize. Ausgrid also has some good information about series and parallel circuits.