22.3 – Investigating the Effect of Temperature on Resistance (Leaving Cert Physics): Flashcards
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Practise the cards
15 cards from this deck
What property does temperature affect in these experiments?
What property does temperature affect in these experiments?
Electrical resistance
2 materials in temp-resistance experiments
2 materials in temp-resistance experiments
Metallic conductors & thermistors
Metallic conductor: resistance vs temp trend
Metallic conductor: resistance vs temp trend
Increases linearly
Thermistor: resistance vs temp trend
Thermistor: resistance vs temp trend
Decreases exponentially
Metallic conductor: graph shape ( vs )
Metallic conductor: graph shape ( vs )
Linear
Thermistor: graph shape ( vs )
Thermistor: graph shape ( vs )
Curved/exponential
Why metallic resistance increases with temp
Why metallic resistance increases with temp
Atoms vibrate more, impede electrons
Why thermistor resistance decreases with temp
Why thermistor resistance decreases with temp
Semiconductor allows more current when heated
Metallic conductor temp coefficient type
Metallic conductor temp coefficient type
Positive
Thermistor temp coefficient type
Thermistor temp coefficient type
Negative
State needed before taking initial readings
State needed before taking initial readings
Thermal equilibrium
Error source: rapid heating causes
Error source: rapid heating causes
Temp changes faster than can be measured
Safety: keep ohmmeter away from
Safety: keep ohmmeter away from
Hotplate
Thermistor practical applications
Thermistor practical applications
Temperature sensors, digital thermometers, HVAC systems
Equipment difference in thermistor experiment
Equipment difference in thermistor experiment
Thermistor replaces wire coil
