What is the voltage across a 2-ohm resistor if a current of 0.5 amperes flows through it?

Unlike the previous questions that asked for current, this question asks for voltage. This requires a different arrangement of Ohm's Law: E = I x R, where Voltage (E) equals Current (I) multiplied by Resistance (R). By plugging in the given values, you multiply the current of 0.5 amperes by the resistance of 2 ohms (0.5 x 2). This calculation yields exactly 1 volt. Distractors typically come from dividing the values instead of multiplying them. For instance, dividing the current by the resistance (0.5 / 2) gives the incorrect answer of 0.25 volts.