Question

Three equal resistors connected in parallel have equivalent resistence R/9. What is the equivalent resistance when they are connected in series​

Answer 1

Answer:

resistors in parallel add so; 1 / (1/R1 + 1/R2 + ... 1/RN)

so 1/ (1/9 + 1/9 + 1/9) = 1 / 3/9 = 9/3 = 3 ohms equivalent resistance