Q. 37 Note
Which of the following represents correct order of conductivity in solids?
A. kmetals >> kinsulators< ksemiconductors
B. kmetals<< kinsulators < ksemiconductors
C. kmetals≃ ksemiconductors > kinsulators = zero
D. kmetals < ksemiconductors > kinsulators ≠ zero
Solids have a wide range of electrical conductivities, and can be categorized into metals, insulators, and semiconductors. Metals are solids with conductivities between 104 and 107 ohm-1 m-1, with metals having conductivity in the order of 107 ohm-1 m-1 being good conductors. Insulators are solids with low conductivities and their conductivities range from 10-20 ohm-1 m-1 to 10-10 ohm-1 m-1. Semiconductors are solids with conductivities in the intermediate range, between 10-6 and 104 ohm-1 m-1. The conductivity of metals is many degrees higher than insulators, while semiconductors have higher conductivity than insulators but lower than metals. The correct answer is (i).
Rate this question :
Note : In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.Chemistry - Exemplar
Why does electrical conductivity of semiconductors increase with the rise in temperature?Chemistry - Exemplar
To get a n-type semiconductor from silicon, it should be doped with a substance with valence__________.Chemistry - Exemplar
Which of the following statements are true about metals?Chemistry - Exemplar
Match the items given in Column I with the items given in Column II.