Question: What is the equivalent resistance of two resistors, R1 = 6Ω and R2 = 3Ω, connected in parallel?

Options:

1. 2Ω
2. 9Ω
3. 18Ω
4. 1.5Ω

Correct Answer: 2Ω

Solution:

In parallel, the equivalent resistance is given by 1/R_eq = 1/R1 + 1/R2, so 1/R_eq = 1/6 + 1/3 = 1/2, thus R_eq = 2Ω.