AIIMS 2017 Physics Resistors in Series and Parallel MCQ Question

The effective resistance between points p and q is 2Ω because the resistors are arranged in parallel and series combinations that simplify to this value. For instance, if two 4Ω resistors are in parallel, their combined resistance is given by $R_{parallel} = \frac{1}{\frac{1}{4} + \frac{1}{4}} = 2Ω$. Other options, such as 3Ω, 5Ω, and 6Ω, would arise from incorrect calculations or misunderstandings of the resistor configurations, such as misapplying series and parallel formulas. Understanding the principles of combining resistances is crucial for solving such problems effectively.