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The temperature dependence of resistance...

The temperature dependence of resistances of Cu and undoped Si in the temperature range 300- 400 K, is best described by :

A

linear increase for `Cu,` exponential decrease for `Si`

B

linear decrease for `Cu`, linear decrease for Si

C

linear increase for `Cu`, linear increase for Si

D

linear increase for `Cu` exponential increase for `Si`

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The correct Answer is:
A
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