# "Explain" questions — WJEC A-Level Physics (Wales)

> 132 questions · physics

## How to answer

WHAT + WHY. Every point paired with a because. Structure: X happens because Y. This causes Z because … Assessment Objective: AO2. Every "explain" answer on this spec is marked against exactly this pattern.

## Sample questions

1. [A student places a hot drink in a polystyrene cup and the same volume of equally hot drink in a thin metal cup. After te…](https://www.gradenine.co.uk/q/a-student-places-a-hot-drink-010d8380)
2. [A sound wave travels through air from a loudspeaker to a listener. Explain what is meant by the amplitude, frequency, an…](https://www.gradenine.co.uk/q/a-sound-wave-travels-through-air-0246c6db)
3. [A student moves a bar magnet into a coil of wire connected to a sensitive ammeter. The ammeter needle deflects, showing …](https://www.gradenine.co.uk/q/a-student-moves-a-bar-magnet-03559c65)
4. [A cyclist rides along a flat road at a constant speed. The cyclist's legs apply a force to the pedals, but the bicycle d…](https://www.gradenine.co.uk/q/a-cyclist-rides-along-a-flat-04bce7bb)
5. [Explain why nuclear power stations are considered by some people to be a good choice for generating electricity, and why…](https://www.gradenine.co.uk/q/explain-why-nuclear-power-stations-are-081fa380)
6. [A student connects a length of nichrome wire to a battery. The student then replaces the nichrome wire with a piece of r…](https://www.gradenine.co.uk/q/a-student-connects-a-length-of-0b5c204c)
7. [A car travels at a constant speed around a circular roundabout. Explain why a net force must act on the car even though …](https://www.gradenine.co.uk/q/a-car-travels-at-a-constant-0d5d02e7)
8. [A metal tin contains air at room temperature. The tin is placed in a freezer and left until the air inside cools to a mu…](https://www.gradenine.co.uk/q/a-metal-tin-contains-air-at-0efe5156)

## Related

- [WJEC A-Level Physics (Wales) revision notes](https://www.gradenine.co.uk/learn/wjec-a-level-physics-wales)
- [WJEC A-Level Physics (Wales) past papers](https://www.gradenine.co.uk/past-papers/wjec-a-level-physics-wales)
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