Electric Resistance of Conductors & Semiconductors with Temp Change

AI Thread Summary
The electrical resistance of conductors increases with temperature due to the increased agitation of atoms, which impedes electron flow. In contrast, for certain semiconductors, resistance can decrease with rising temperature as more charge carriers are generated from the valence band. This behavior is attributed to the thermal excitation of electrons, enhancing conductivity in semiconductors. Understanding these temperature-dependent characteristics is crucial for applications in electronics and materials science. Overall, the relationship between temperature and resistance varies significantly between conductors and semiconductors.
noor.lalu
Messages
4
Reaction score
0
1.What happens to the electrical resistance of conductors, semiconductors, with increase in temperature? And explain why?
 
Physics news on Phys.org
For conductors, the resistance will increase with T, while for some semiconductors, the resistance may decrease with T, which results from the agitation of the electrons in the valence band
 
lionelwang said:
For conductors, the resistance will increase with T, while for some semiconductors, the resistance may decrease with T, which results from the agitation of the electrons in the valence band
thank u soo much now i clearly understand
 

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

Similar threads

Why are the electrostatic field lines normal to a charged conductor?
Replies
10
Views
1K
Direction of electric field vector on the surface of charged conductor
Replies
9
Views
1K
Identical Batteries in Parallel do not Draw Same Current, Non-Ideal?
Replies
7
Views
891
How do you Calculate Ampacity of a Conductor Geometry?
2
Replies
64
Views
5K
Resistance and Temperature in conductors and semiconductors
Replies
1
Views
3K
Electric current and resistance question
Replies
2
Views
2K
Incandescent Bulb - suitable approximation for voltage-current curve
Replies
2
Views
947
Compare the conductance of an insoluble salt with soluble one
Replies
2
Views
761
Electrical Circuits - Parallel vs. Series
Replies
14
Views
1K
Electrical Conductor is in relation to heat transfer
Replies
6
Views
1K

Hot Threads

Recent Insights

Back
Top