1 min read
Material and Temperature
Resistance depends on material resistivity and temperature.
Choose Your Level
Material and Temperature
Recommended for Class 10
Material and Temperature
Resistance also depends on the material and its temperature.
Material
Different substances have different resistivities.
A low-resistivity material such as copper conducts current well.
A higher-resistivity material opposes current more strongly for the same dimensions.
Temperature in Metals
For most metals:
temperature increases → resistance increases
Heating makes the metal lattice vibrate more strongly, increasing collisions that impede electron drift.
Over a suitable temperature range:
**R = R₀[1 + α(T − T₀)]**
where `α` is the temperature coefficient of resistance.
Semiconductors
Some materials, particularly semiconductors, behave differently.
Their resistance can decrease significantly as temperature rises because more mobile charge carriers become available.
Material and Temperature — Advanced
Common Mistakes
Common Mistakes
- Mistake
Not all materials show the same temperature behaviour.
- Mistake
For metals, higher temperature generally means higher resistance.
Revision Zone
60-Second Revision
Quick cues from this topic — use them for last-minute revision.
- Definition
Did you understand this topic?
Your answer is saved with your learning record. It does not mark the topic as mastered.
Ready to test yourself?
You've completed the learning section.
Practice
PQ
Q1. Define resistivity
PQ
Q2. compare copper/high-ρ material
PQ
Q3. metal temperature effect
PQ
Q4. semiconductor contrast
PQ
Q5. use qualitative `R=R₀(1+αΔT)`
Exam Practice
EQ
Q1. Explain resistance dependence on material.
EQ
Q2. Explain temperature effect in metals.
EQ
Q3. Why does lattice vibration matter?
EQ
Q4. Contrast semiconductor behaviour.
EQ
Q5. State temperature-resistance relation.
School-standard facts for Matric and Intermediate. Original explanations — not copied from textbooks.