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प्रश्न
Show on a graph, the variation of resistivity with temperature for a typical semiconductor.
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उत्तर
The following curve shows the variation of resistivity with temperature for a typical semiconductor.
This is because, for a semiconductor, resistivity decreases rapidly with increasing temperature.
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संबंधित प्रश्न
(i) Explain with the help of a diagram the formation of depletion region and barrier potential in a pn junction.
Explain the working of P-N junction diode in forward and reverse biased mode.
What happens when a forward bias is applied to a p-n junction?
In the following diagram, is the junction diode forward biased or reverse biased ?
The graph shown in the figure represents a plot of current versus voltage for a given semiconductor. Identify the region, if any, over which the semiconductor has a negative resistance.
In a photo diode, the conductive increases when the material is exposed to light. It is found that the conductivity changes only if the wavelength is less than 620 nm. What is the band gap?
(Use Planck constant h = 4.14 × 10-15 eV-s, Boltzmann constant k = 8·62 × 10-5 eV/K.)
The current through an ideal PN-junction shown in the following circuit diagram will be:
A – pn junction has a depletion layer of thickness .of the order of
In the depletion region of a diode ______.
- there are no mobile charges.
- equal number of holes and electrons exist, making the region neutral.
- recombination of holes and electrons has taken place.
- immobile charged ions exist.
With reference to a semiconductor diode, define the depletion region.
