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प्रश्न
With an increase in the temperature, the electrical conductivity of a semiconductor ______.
पर्याय
decreases.
increases.
does not change.
first increases and then decreases.
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उत्तर
With an increase in the temperature, the electrical conductivity of a semiconductor increases.
Explanation:
With increase in temperature, the number of electrons from the valence band can jump to the conduction band in semiconductor. Hence, the conductivity of a semiconductor increases.
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संबंधित प्रश्न
Distinguish between 'intrinsic' and 'extrinsic' semiconductors
Electronic configuration of germanium is 2, 8, 18 and 4. To make it extrinsic semiconductor small quantity of antimony is added. The correct statement is ____________.
In n-type semiconductor, the fifth electron ______.
Explain the following term:
Extrinsic semiconductor
In a pure semiconductor crystal of Si, if antimony is added then what type of extrinsic semiconductor is obtained. Draw the energy band diagram of this extrinsic semiconductor so formed.
The conductivity of a semiconductor increases with increase in temperature because ______.
In an extrinsic semiconductor, the number density of holes is 4 × 1020 m-3. If the number density of intrinsic carriers is 1.2 × 1015 m-3, the number density of electrons in it is ______.
- Assertion (A): Putting the p-type semiconductor slab directly in physical contact with the n-type semiconductor slab cannot form the pn junction.
- Reason (R): The roughness at contact will be much more than inter atomic crystal spacing and continuous flow of charge carriers is not possible.
Which type of dopant is arsenic (As)?
Why are different impurities added to semiconductors?
