SP10b Current and Potential Difference | Edexcel GCSE Physics Topic Mastery Pack

A focused three-component revision and exam practice pack for SP10b, covering the complete Edexcel Separate Science Physics specification for measuring current and potential difference, and current conservation (P10.4, P10.7, P10.10, P10.11).

Topic Mastery Sheet covers the rule that ammeters are connected in series and voltmeters in parallel, with an explanation of why (voltmeters must have very high resistance to avoid drawing current from the circuit); the conditions needed for current to flow (closed circuit + source of p.d.); current conservation at a junction with a worked numerical example; and a table comparing current and voltage behaviour in series and parallel circuits, including the correct positions for ammeters and voltmeters in each. The distinction between d.c. and a.c. is introduced, with sources of each identified. UK mains facts (50 Hz, 230 V, a.c.) are included as supporting reference for SP10h.

Student Exam Practice Sheet includes a four-blank cloze passage matching instruments to measurement position (ammeter/voltmeter, series/parallel); a three-part parallel circuit question covering current addition, the principle of conservation and voltage across branches; and a two-part d.c./a.c. question with a description and a source MCQ. Question format matches the Edexcel test style.

Teacher Answer Key provides a complete mark scheme specifying that in the passage all four phrases must be in correct order for marks to be awarded, and that “alternating current alternates” is not accepted as a description of a.c…

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