The starter motor of a car engine draws a current of 170 Afrom the battery. The

Question

The starter motor of a car engine draws a current of 170 Afrom the battery. The copper wire to the motor is 6mm in diameterand 1.4 m long. The starter motor runs for 0.6s until the carengine starts. (a) How much charge passes through the starter motor? (b) How far does an electron travel along the wire while thestarter motor is on? The starter motor of a car engine draws a current of 170 Afrom the battery. The copper wire to the motor is 6mm in diameterand 1.4 m long. The starter motor runs for 0.6s until the carengine starts. (a) How much charge passes through the starter motor? (b) How far does an electron travel along the wire while thestarter motor is on?

Explanation / Answer

a) I = Q/t =>Q = I*t = 170A*0.6s = 102 C 102C charge passed through the starter. b)

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