Science · KS3 · Electricity and Magnetism
KS3 Electricity and Magnetism Practice for Years 7–9
KS3 develops electricity from simple circuits into relationships between current, potential difference and resistance, while magnetism introduces fields, magnetic forces and electromagnets. Models and measurements need to be connected rather than memorised separately.
What to understand in this topic
- distinguish current from potential difference and resistance
- compare simple series and parallel circuit behaviour
- describe magnetic fields and attraction or repulsion between poles
- explain that an electric current can produce a magnetic field
A common point of confusion
Current is not “used up” as it travels through a simple series circuit. The energy transferred by components is a different idea from the electric current flowing through the circuit.
Try a quick example
Question: Two north poles of bar magnets are brought close together. What happens?
Answer: They repel.
Like magnetic poles repel; unlike poles attract.
This is a fixed educational example on the page, not a customer result and not a live tutor response.
What a parent can try at home
Use only school-approved low-voltage equipment for circuit work. For magnetism, map the direction of a field around a bar magnet using a compass under adult or teacher supervision.
How NexEdu practises this
NexEdu can practise circuit and field reasoning but does not perform measurements or laboratory experiments. It must not replace practical safety rules, and household mains electricity should never be used for informal experiments.
NexEdu provides guided questions throughout the child’s available daily tutoring time. A hint can follow an incorrect answer, and two consecutive incorrect answers trigger a brief reteach before practice continues. Same-day topic progress can resume where the child left off.
Related learning
About the information on this page
The educational summary helps parents understand the science topic and its place in the National Curriculum in England. Online practice does not replace supervised practical work, safety instruction or professional health advice where relevant.