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Class 12th Physics 2018 Set1 Delhi Board Paper Solution

Question 12

Define the term 'conductivity' of a metallic wire. Write its SI unit.


Conductivity of a metallic wire is defind as the degree to which a specified material conducst electricity calculated as ratio of current density in the material to the electric field which causes flow of current,

The SI unit of conductivity is ohm-1 metre-1 or mho metre-1 or siemen metre-1


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