Science 9 – Students used compasses and charging/discharging circuits to see where current flowed in a circuit. This is a crucial lab to show that charges don’t originate in batteries. Evidence for this is that charge flows on both sides of the capacitor and charges can’t get past the insulator in the capacitor. As well, there is current when the circuit discharges without a battery.
This is such a great lab to do but it requires the right classroom culture. Students have to want to find answers to the questions being asked of them.