Question

The starter motor of a car engine draws an electric current of 22.0 A from the battery. The copper wire to the motor is 5.20 mm in diameter and 1.00 m long. The starter motor runs for 0.75 s before the car engine starts up. How much electric charge passes through the starter motor?

Answer 1

Q:Question:

The starter motor of a car engine draws an electric current of 20.0 A from the battery. The copper wire to the motor is 4.30 mm in diameter and 1.49 m long. The starter motor runs for 0.75 s before the car engine starts up. How much electric charge passes through the starter motor? What is the current density in the wire?

A:Answer: