A wire with resistance R is connected to the terminals of a 30 V battery. What is the potential difference between the ends of the wire? What is the current I through the wire, if the wire has the resistance 1.0 Ω? What is the current I through the wire, if the wire has the resistance 2.0 Ω? What is the current I through the wire, if the wire has the resistance 3.0 Ω?
