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A copper rod is connected in series with an iron rod. Using Ohm's law (V = RI), determine the potential difference.

1. 0.117 volts
2. 0.01 volts
3. 0.5 volts
4. 1 volt

Correct answer: 0.117 volts

Solution

The voltage across the series combination of copper and iron rods can be calculated using Ohm's law, V = IR, where the total resistance is the sum of the resistances of the two rods. Without specific resistances or current values provided, the most plausible answer is 0.117 V based on typical values.

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