Problem 27.47 Part A The starter motor of a car engine draws a current of 200 A

Question

Problem 27.47 Part A The starter motor of a car engine draws a current of 200 A from the battery. The copper wire to the motor is 4.00 mm in diameter and 1.2 m long. The starter motor runs for 0.850 s until the car engine starts How much charge passes through the starter motor? Express your answer with the appropriate units 170 C Submit My Answers Give Up Correct Part B How far does an electron travel along the wire while the starter motor is on? Express your answer with the appropriate units ValueUnits Submit My Answers Give Up rovide Feedba Continue

Explanation / Answer

drift velocity V = i/neA

V = 200/(8.48e28 * 1.6e-19 *3.14*2*2e-6)

Vd = 0.117 mm/s

so distance travelled = S = vt

S = 0.85*0.117mm/s

S = 0.0994 mm

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