CourseCourseConceptConceptDocumentDocument

CAIE IGCSE Physics 4.2.2.3 Electrical Conduction in Metals in Questions

Practise linking current in metals to mobile electrons and using metal structure to explain why copper wires conduct well.

Syllabus
2026–2028
Course
Physics 0625

Exam points

  • Identify free or mobile electrons as the moving charged particles in a metal wire, explain good metallic conduction from delocalised electrons in the structure, and describe electron movement through a wire when a charged sphere discharges.

CAIE IGCSE Physics 4.2.2.3 Electrical Conduction in Metals in Questions question 1

[Maximum number: 2]

Fig. 6.1 shows an isolated metal sphere suspended by an insulating thread from the ceiling.

Fig. 6.1

Fig. 6.1

The sphere is negatively charged.

The magnitude of the charge on the sphere is 3.5×10−10C3.5 \times 10^{-10} \mathrm{C}.

An earthed metal wire is touched against the surface of the sphere and the sphere is discharged.

State what happens in the wire as the sphere is discharged.

All question bank results loaded