3-ELE-04

Outcomes

• Pupils can:

Reinforce Current is the rate of flow of charge Q = I × t

Introduce idea of free electron movement in metals- which way do they flow? Conventional current.

Show charge flow in an electrolyte – ions = charged particles

Specification References

2.15 understand that current is the rate of flow of charge

2.16 recall and use the relationship between charge, current and time : charge = current × time

2.17 recall that electric current in solid metallic conductors is a flow of negatively charged electrons

Starter

• Class act as charges in a circuit. Which way would they move if they were i) positive ii) negative?
• Cannot see charges moving in a metal but can observe what happens in a liquid (electrolyte)