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Topic 26Physics (Cambridge)

Practical Skills (Paper 3)

Practical Skills coaching for Cambridge International AS & A Level Physics (9702) Paper 3 — Advanced Practical Skills. A skills trainer for the AO3 lab skills Paper 3 rewards: recording readings with their uncertainties and consistent significant figures, plotting graphs and reading gradients with a large triangle, and finding the uncertainty in a result from a worst-acceptable-fit line, combining percentage uncertainties, and evaluating limitations. This is a coaching studio, not an auto-marked exam paper — Paper 3 is a hands-on bench exam that cannot be digitised.

Practice questions
1

Practical Skills: Recording, Graphs & UncertaintiesSign up

recording & uncertainty: instrument resolution sets the absolute uncertainty; consistent significant figures / decimal places in a results table; absolute vs fractional vs percentage uncertainty · graphs & gradients: choosing sensible axes and scales, plotting points with error bars, drawing a best-fit line, reading the gradient with a large gradient triangle (m = Δy/Δx from the line) · uncertainty in results & evaluation: worst-acceptable-fit line → uncertainty in the gradient Δm = |m_best − m_worst|; combining percentage uncertainties (add for products/quotients, multiply by the power); identifying anomalies; stating limitations and improvements

45 min