A semiconductor diode and a resistor of constant resistance are connected in some way inside a box having two external terminals, as shown in the diagram below. When potential difference of 1.0 V is applied across the terminals the ammeter reads 25 mA. If the same potential difference is applied in the reverse direction the ammeter reads 50 mA.
What is the most likely arrangement of the diode and the resistor? Explain your deduction. Calculate the resistance of the resistor and the forward resistance of the diode.
Answers: 40 Ω, 40 Ω
2. The attempt at a solution
I would say the arrangement should be as follows:
Since the diode consumes energy, therefore the current is smaller on its side. And current is higher on the side of the resistor.
But I am not sure about it. I am also not sure whether "when a PD of 1 V is applied across the terminals" it means that both the diode and the resistor have a PD of 1 V?