A current of 2 A flows through a wire of resistance 3 ohms. What is the voltage across the wire?
Correct: C
The voltage across the wire can be calculated using Ohm's law, V = IR, where V is the voltage, I is the current, and R is the resistance. Given I = 2 A and R = 3 ohms, we can calculate V = 2 * 3 = 6 V.