Physics, asked by nipunchaudhry, 9 months ago

when we say that the resistivity of a substance is numerically equal to the resistance of a rod of that substance which is 1 metre long and 1 square metre in cross section so what do we mean by the rod of the substance

Answers

Answered by kadavakolluv

Answer:

current flowing through the rod increases with increse with the cross section of area hence the resistance of the rod decreases with increase with the cross section area of the rod

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when we say that the resistivity of a substance is numerically equal to the resistance of a rod of that substance which is 1 metre long and 1 square metre in cross section so what do we mean by the rod of the substance​

Answers

when we say that the resistivity of a substance is numerically equal to the resistance of a rod of that substance which is 1 metre long and 1 square metre in cross section so what do we mean by the rod of the substance