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Types Of Materials Free Doubts and Solutions

CBSE - XII Science - Physics - Semiconductor Electronics

Why is Silicon more frequently used than Germanium given that the energy required to jump the forbidden band for Germium is lesser than Silicon?

Asked by Anirudh 14th August 2017, 12:23 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

In the case of exxtrinsic semiconductors, why thermally produced minor charge carriers meet the major chrge carriers and get destroyed?

Asked by Anirudh 14th August 2017, 10:41 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

When atoms start coming nearer to form a solid, there are different energy states(6N and 2N as per NCERT Physics pg 470). These different states which originally had the same energy spread out to form an energy band. Please explain why this happens. why does it spread out. 

Asked by Anirudh 14th August 2017, 10:35 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

Show on a graph, the variation of resistivity with temperature for a typical semiconductor.

Asked by Topperlearning User 10th July 2014, 9:46 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

Why is a semiconductor virtually an insulator at room temperature?

Asked by Topperlearning User 17th June 2014, 3:32 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

Distinguish between an intrinsic semiconductor and p-type semiconductor. Give reason, why, a p-type semiconductor is electrically neutral, although nh>>ne?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

What is meant by the term doping of an intrinsic semiconductor ? How does it affect the conductivity of a semiconductor ?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

Which of the one between silicon and germanium preferred in the manufacturing of semiconductor devices? Why?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

The hole current is due to the movement of valence electrons from one covalent bond to another. Why is then the name hole current?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

Why is the amount of impurity added to a pure semiconductor closely controlled?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

Why do hole carriers present in n-type semiconductor?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

Why are n-type and p-type semiconductor electrically neutral?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

Why are germanium and silicon preferred to other semiconductors in solid state devices?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

For the same degree of doping, why is the conductivity of n-type semiconductor greater than that of p-type semiconductor?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

How does the addition of trivalent impurity to a pure semiconductor affect the electron hole pairs at room temperature?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

Why do conductors not form holes?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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