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2 votes
2 answers
23k views

Why in a conductor increase in temperature makes the atoms vibrate but in a semiconductor the kinetic energy of the free electrons is increased?

When temperature is increased in case of a semiconductor the free electron gets more energy to cross the energy gap to the conduction band from the valence band.so now more electrons can go easily to ...
1 vote
3 answers
6k views

Are thermistors and filament bulbs ohmic?

Conductors are ohmic if they have a constant resistance given that the physical conditions, such as temperature, are constant. A filament bulb and thermistor are considered to be non-ohmic because ...
1 vote
0 answers
1k views

Differences in conductivity as temp rises for intrinsic vs extrinsic semiconductrs

For a doped semiconductor, near the end of the extrinsic temp region due to heightened effects of lattice scattering conductivity goes down "temporarily" (temperature wise). What happens to the ...
3 votes
1 answer
11k views

How does temperature affect an electrical current

Synopsis I have read an interesting article J. Halderman et al. "Lest we remember: cold boot attacks on encryption keys" in computer science regarding cold booting. The paper discusses how the use ...