why is resistance variable in different sbstances

Asked by Somya Sharma | 31st May, 2013, 10:49: AM

Expert Answer:

Resistance is different for different substances because the resistivity of different materials is different. And resistivity of different materials is different because each material has different number of free electrons and also the interaction between electrons and nucleus is different in each material due to a different in their atomic number. 

Answered by  | 31st May, 2013, 08:35: PM

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