A-Level Physics Specification

OCR A H556

Section 4.2.4: Resistivity

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#4.2.4a

(i) resistivity of a material; the equation \(R = \dfrac{ρL}{A} \)

(ii) techniques and procedures used to determine the resistivity of a metal.

PAG3

#4.2.4b

the variation of resistivity of metals and semiconductors with temperature

#4.2.4c

negative temperature coefficient (NTC) thermistor; variation of resistance with temperature.