3. What is the potential difference across a 1 500 12 resistor carrying a
current of 0.075 A (75 mA)?

The potential difference across a 1500 ohm resistor carrying a current of 0.075 A is approx. equal to 113 V.

Explanation:

An ideal electrical circuit obeys Ohm's law. As per this law, the potential difference in any electrical circuit will be directly proportional to the current flowing in that circuit. And the proportionality constant is the resistance offered by the circuit.

As here, the current is said to be carried as 0.075 A and the resistance is 1500 ohm, then the potential difference will be

Thus, the potential difference across a 1500 ohm resistor carrying a current of 0.075 A is approx. equal to 113 V.