Question: What is the equivalent resistance (R_eq) of two resistors R1 and R2 in parallel?

Options:

1. 1/R_eq = 1/R1 + 1/R2
2. R_eq = R1 + R2
3. R_eq = R1 * R2
4. R_eq = R1 - R2

Correct Answer: 1/R_eq = 1/R1 + 1/R2

Solution:

For resistors in parallel, the equivalent resistance is given by 1/R_eq = 1/R1 + 1/R2.