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Q.

Figures (a) and (b) show the variation of resistivity ( ρ) with temperature (T) for some materials. Identify the type of these materials 
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a

Conductor and Semiconductor

b

Both are Conductors

c

Insulator and Semiconductor

d

Conductor and Insulator

answer is A.

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Detailed Solution

In conductors resistivity increases as temperature increases and in semiconductors resistivity decreases as temperature increases.

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