IB Physics HL S2.2.2 Processing and Interpreting Data Topic Practice

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Study S2.2.2—Processing and interpreting data conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

Question 1

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A student determines the resistivity ρ\rho of a metal that is in the form of a cylindrical wire. The student makes the following measurements:

 Length L of the wire =(462±2)mm\text { Length } L \text { of the wire }=(462 \pm 2) \mathrm{mm}
Readings for the diameter d of the wire:

Readings for the diameter d of the wire:

 Resistance R of the wire =13.7Ω±1.5%\text { Resistance } R \text { of the wire }=13.7 \Omega \pm 1.5 \%

Show that the mean diameter of the wire is about 0.2 mm .

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