Physics · A-Level · AQA · AQA A-level Physics (7408) · Specification point · 3.5.1.3 · Electricity · Current electricity
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3.5.1.3 Resistivity
| Content | Opportunities for skills development |
|---|---|
Resistivity, Description of the qualitative effect of temperature on the resistance of metal conductors and thermistors. |
Only negative temperature coefficient (ntc) thermistors will be considered.
Applications of thermistors to include temperature sensors and resistance–temperature graphs.
Superconductivity as a property of certain materials which have zero resistivity at and below a critical temperature which depends on the material.
Applications of superconductors to include the production of strong magnetic fields and the reduction of energy loss in transmission of electric power.
Critical field will not be assessed.
MS 3.2, 4.3 / PS 1.2 / AT a, b, f, g Investigation of the variation of resistance of a thermistor with temperature. |
Required practical 5: Determination of resistivity of a wire using a micrometer, ammeter and voltmeter. |