What is the current in a copper wire that has a resistance of 4 ohms and is connected to a 9-volt electrical source?

I = E/R = 9/4 = 2.25 Ampere

The wire is dissipating 20.25 watts, and is getting pretty hot.
I = E/R = 9/4 = 2.25 Ampere

The wire is dissipating 20.25 watts, and is getting pretty hot.