SP10d Resistance | Edexcel GCSE Physics Topic Mastery Pack

A focused three-component revision and exam practice pack for SP10d, covering the complete Edexcel Separate Science Physics specification for Ohm’s law, resistance in series and parallel, and series circuit calculations (P10.12–P10.16).

Topic Mastery Sheet covers the equation V = I × R with all three rearrangements stated and a worked example; the definition of the ohm with units; variable resistors and how they control current; the rule for series resistance (R_total = R₁ + R₂) and the rule for parallel resistance (R_total less than smallest individual R) each explained from physical reasoning rather than just stated; and a full series circuit worked example calculating total resistance, current, and voltage across each resistor with a check that voltages sum to the supply - the exact multi-step calculation type used in the exam.

Student Exam Practice Sheet includes a one-mark equation recall; a 0.20 A through 60 Ω lamp calculation (matching the standard paper); a three-part series circuit calculation finding total resistance, current and voltage across one resistor; and a three-mark explanation question on why series increases and parallel decreases total resistance. Question format matches the Edexcel test style.

Teacher Answer Key provides a complete mark scheme specifying that “volts = amps × ohms” is rejected as an equation (only symbolic or word-equation forms accepted), and that full marks are awarded for correct numerical answers with no working shown in calculation questions.

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