The Length and Cross-Sectional Area of a Wire Determine the Resistance

Short Answer

The length and cross-sectional area of a wire determine the resistance that the wire gives to the flow of electricity. The resistance of a wire varies directly as the length of the wire and inversely as the cross-sectional area. A wire with a length of $2400 \mathrm{~cm}$ and a cross-sectional area of $6.29 \times 10^{-3} \mathrm{~cm}^{2}$ has a resistance of $.656 \mathrm{ohm}$ . If another wire has a length of $2000 \mathrm{~cm}$ and a cross-sectional area of $7.11 \times 10^{-3} \mathrm{~cm}^{2}$ , determine the resistance of the wire.