All Questions
Tagged with electricity semiconductor-physics
61
questions
3
votes
1
answer
11k
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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 ...
- 133
1
vote
2
answers
2k
views
What actually happens at the microscopic level in a Zener diode in reverse bias?
A Zener diode is used as a voltage stabilizer. The graph of current vs voltage of Zener diode clearly shows that there is a constant voltage across Zener after the breakdown voltage as the current ...
- 3,905
5
votes
3
answers
535
views
What can justify the decrease of the electrical conductivity with the increase of light intensity?
I have currently been working with a sample that "appears to" decrease its resistance when I cover it and protect it from light.
Basically it presents the opposite behaviour of a photoresistor.
What ...
- 1,334
0
votes
2
answers
159
views
Need an intermediate resistivity part/material
I need a part or material for a planned experiment (the experiment is similar to those described in my articles http://arxiv.org/abs/1208.0066 and http://arxiv.org/abs/1109.1626 ). The problem is that ...
- 27.1k
2
votes
3
answers
2k
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Producing electricity from all wavelengths of electromagnetic spectrum
Is it possible to produce electricity from all wavelengths of electromagnetic spectrum beside visible light ?Like using gamma rays or x-rays .
- 29
5
votes
2
answers
29k
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How does current flow from the emitter, through the base and to the collector in a NPN transistor?
So, I understand that for a NPN transistor to work the emitter-base junction needs to be forward biased and the collector-base junction needs to be reverse biased. I understand how current flows from ...
- 59
8
votes
2
answers
1k
views
Ionized Depletion Region, Why aren't those charged being excited?
Ok so I understand the PN junction, and how when 2 Semiconductor materials are placed together the Electrons will jump into the Holes near the junction creating a Negatively Ionized Atoms on the P-...
user20118
0
votes
1
answer
609
views
Carrier Electrons Generation and Recombination Time
When a Electron gets promoted to the conduction band from valence band (In generation) lets say for example in Silicon at room temperature.
Is there any way to determine (on average) how long it will ...
user20118
3
votes
1
answer
335
views
Theory of Space Charge in a Planar Diode
A planar diode in a vacuum bulb can support current in only one direction. To even get current flowing, you have to heat up the cathode filament to excite the electrons. However, once current is ...
- 143
2
votes
1
answer
3k
views
How is contact resistivity defined for a Schottky contact, or the Schottky barrier height for an ohmic contact?
Based on the transfer length method (TLM), one can accurately calculate the contact resistivity for an ohmic contact, by evaluating the absolute resistance measured through the test structure and ...
- 131
0
votes
1
answer
414
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Equation for finding electrical resistance
I want to know how the flow of electrons will change when I change the tempertature from 100 F to 250 F in a silicon semi-conductor (ex: computer mouse)
How can I find this out?
- 187