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Which of the following represents correct

Question:

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

(i) κ metals >> κ insulators< κsemiconductors

(ii) κmetals<< κinsulators < κsemiconductors

(iii) κmetals κsemiconductors> κinsulators = zero

(iv) κ metals< κ semiconductors > κinsulators ≠ zero

Solution:

Option (i) κ metals >> κ insulators< κsemiconductors is the answer.

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