following: or numbers 1-3: In a copper wire of diameter 2mm, 3x 1023 electrons flow in one second. Calculate the 1. Current (5 pts) 2. Current density magnitude(5pts) 3. Electric field magnitude (5 pts) 4. The temperature coefficient of resistivity of carbon is -0.0005/Co. If the resistor is made of graphite has a resistance of 5 kS at 20" find the resistance at 270.(5pts) 5. A 12-volt battery has an internal resistance Of 0.0102. The starter motor of the car draws a current of 230 A. What is the potential difference between the terminals of the battery at this time.(5pts)