1.

Which one of the following is the correct grouping of different materials according to their electrical conductivity?    

A. Electrical Insulators Electrical Conductors Plastic/wood Mercury, tungsten
B. Electrical Insulators Electrical Conductors Carbon, steel Iron, paper  
C. Cobalt  
D. Electrical Insulators Electrical Conductors Iron, rubber Silver, plastic
Answer» B. Electrical Insulators Electrical Conductors Carbon, steel Iron, paper  


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