Question

Write the relation between resistance ofa material and its cross-sectional area?​

Answer 1

Answer:

its length – the longer the wire, the greater its resistance. its cross-sectional area A – the greater the area, the less its resistance. the resistivity of the material r – the greater the resistivity, the greater its resistance

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Answer 2

The resistance of a conductor varies inversely with its area of cross section.

- The formula of resistance is:

R = ρl/A

- Hence, the resistance depends inversely on the cross- sectional area:

R ∝ 1/A

- On increasing the area, the electrons can flow easily and hence the resistance is low.

- If area is less, the electrons cannot flow easily and hence the resistance is high.