Final answer:
The maximum resistance possible given a resistor of 100 Ω and a resistor of 40 Ω is 140 Ω.
Step-by-step explanation:
The maximum resistance possible given a resistor of 100 Ω and a resistor of 40 Ω can be found by connecting them in series. In a series circuit, the total resistance is calculated by adding the individual resistances:
Total resistance = Resistance of Resistor 1 + Resistance of Resistor 2
So, the maximum resistance possible would be:
Total resistance = 100 Ω + 40 Ω = 140 Ω
Therefore, the correct answer is d) 140 Ω.