I'm sure this is pretty basic, but I'm not very good at electricity.
At both ends of a conductor we apply 12 volts. For one minute an electric charge of 72 C passes through the conductor. What is the resistance of the conductor?
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Current is the amount of charge passing though a surface area per second. If in 60 seconds 72C of charge flows through this surface, then in 1 second, 72C/60 flows, and that is your current I = 72/60 Amps.
Now use Ohms law, V = IR to find the resistance R with V = 12v and I = 72/60A