SATHEE: Modern Physics 6 Question 17

Modern Physics 6 Question 17

19. The temperature dependence of resistances of $C u$ and undoped $S i$ in the temperature range $300 - 400 K$ , is best described by

(2016 Main)

(a) linear increase for $C u$ , linear increase for $S i$

(b) linear increase for $C u$ , exponential increase for $S i$

(d) linear decrease for $C u$ , linear decrease for $S i$

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Solution:

As, we know $C u$ is conductor, so increase in temperature, resistance will increase. Then, $S i$ is semiconductor, so with increase in temperature, resistance will decrease.

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Modern Physics 6 Question 17

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

Solution:

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19. The temperature dependence of resistances of $C u$ and undoped $S i$ in the temperature range $300 - 400 K$ , is best described by