When the starter motor on a car is engaged, there is a 290 A current in the wires between the battery and the motor. Suppose the wires are made of copper and have a total length of 1.5 m. What minimum diameter can the wires have if the voltage drop along the wires is to be less than 0.55 V?
Answers: 2
= 3.36 mm
(Voltage = Current * Resistance)
is the resistivity of the material, 
 and 
are the length and cross-sectional area, respectively.
where 
is the diameter.
. With these and other given values,
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