Edexcel IGCSE Physics 2.25P Attraction & repulsion
Practise using observations of charged rods, particles and plates to decide whether forces are attractive or repulsive.
- Syllabus
- First assessment 2019
- Course
- Physics 4PH1
Exam points
- link movement towards a rod or plate to attraction between opposite charges
- predict spreading or separation when particles or objects have like charges
- use a bar chart or scale reading to compare charge size and force strength
2.25P Attraction and repulsion question 1
A student uses this apparatus to demonstrate the effect of electric charge.
He pours some fine powder into a funnel.
The fine powder moves through a length of plastic tubing and falls into a metal can.
The metal can rests on a metal cap.
The metal cap is connected to a thin piece of metal via a metal rod.
When the powder lands in the can, the thin piece of metal moves away from the metal rod.
Explain why the thin piece of metal moves away from the metal rod.
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