How does increasing the temperature affect a semiconductor?

a. The band gaps increase in energy.
b. The resistance decreases linearly with increasing temperature.
c. More and more electrons are near the Fermi energy.
d. The electrons separate from their paired state when the resistance increases.
e. At the critical temperature, the semiconductor becomes an impurity semiconductor.


c.
With the temperature increased, more and more electrons are close to being excited into the conduction band and participating in the electrical and thermal conduction processes within the semiconductor.

Physics & Space Science

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Gauss's Law: The figure shows four Gaussian surfaces surrounding a distribution of charges.(a) Which Gaussian surfaces have an electric flux of +q/?o through them?(b) Which Gaussian surfaces have no electric flux through them?

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A. due to their movement across the sky B. due to the refraction caused by atmospheric irregularities C. due to rapid changes occurring on their surfaces D. due to imperfections in the human eye

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The electric resistance of a superconductor is

A) zero. B) infinite. C) usually lower than ordinary resistors. D) none of the above

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Consider the following three items

A. 100 g of steam on the Moon B. 10 g of water on the Earth C. 20 g of ice floating in water on the Earth Put these items in order of increasing mass:

1.A < B < C 2.A < C < B 3.B < A < C 4.B < C < A 5.C < A < B 6.C < B < A 7.None of the above 8.Impossible to determine

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