Final answer:
To measure the potential difference across a resistor using a multimeter, the multimeter needs to be connected in parallel with the resistor.
Step-by-step explanation:
To measure the potential difference across a resistor using a multimeter, the multimeter needs to be connected in parallel with the resistor. One lead of the multimeter should be connected to one end of the resistor, and the other lead should be connected to the opposite end. This allows the multimeter to measure the voltage drop across the resistor.