Physics
Define the term specific resistance and state it's S.I. unit.
Current Electricity
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Answer
Specific resistance of a material is the resistance of a wire of that material of unit length and unit area of cross section.
The S.I. unit of specific resistance is ohm × metre or (Ω m)
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(a) Name two factors on which the specific resistance of a wire depends?
(b) Two wires A and B are made of copper. The wire A is long and thin while the wire B is short and thick. Which will have more specific resistance?