Question
The temperature dependence of resistances of Cu and undoped Si in the temperature range 300-400 K is best described by:
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Linear increase for Cu, linear increase for Si.
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Linear increase for Cu, exponential increase for Si.
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Linear increase for Cu, exponential decrease for Si.
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Linear decrease for Cu, linear decrease for Si.
Solution
C.
Linear increase for Cu, exponential decrease for Si.
As we know Cu is a conductor, so increase in temperature, resistance will increase. Then, Si is a semiconductor, so with the increase in temperature, resistance will decrease.
