A 3.50 meter length of wire with a cross sectional area of 3.14
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A 3.50 meter length of wire with a cross sectional area of 3.14

a) A 3.50 meter length of wire with a cross sectional area of 3.14 × 10–6 m 2 is at room temperature. The current in the wire is 24.0 A when connected to a 1.50 V source of potential difference.

i) Determine the resistance of the wire.

ii) Calculate the resistivity of the wire. [Show all work, including the equation and substitution with units.

b) The overhead wire used to supply power to UTECH computer lab C has area of cross- section 5.0 x 10 -5 m2 and is made of copper of resistivity 1.72 x 10 -8 Ω m. Calculate the resistance of one kilometer length of the wire.

Hint
ManagementResistance is basically a measure of the opposition to the current flow in the electrical circuit. Also, it is measured in ohms that are basically symbolized by the Greek letter omega (Ω). The Ohms were named after a German physicist Georg Simon Ohm because he studied the relationship between the current, voltage and resistance....

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