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Q.

Which of the following represents correct order of conductivity in solids?

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a

κmetals ≫γinsulators <κsemiconductors

b

Kmetals <

c

κmetals κsemiconductors >κinsulators = zero

d

κmetals <κsemiconductors >κinsulators ≠ zero

answer is A.

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Detailed Solution

Metals are conductor, semi conductors conduct very less electricity, while insulators have conductivities in the range of 10−20−1010Ω−1m−1.
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