Question

How resistance is depended or related with length and area of cross section of a wire

Answer 1

because in this dependent or related with length and area of cross section of wire

Answer 2

The SI unit of electrical resistivity is the ohm⋅metre (Ω⋅m). It is commonly represented by the Greek letter ρ, rho. Although the SI resistivity unit, the ohms metre is generally used, sometimes figures will be seen described in terms of ohms centimetres, Ω⋅cm

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