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ECAT Physics QUESTION #743
Question 1
Two resistances of 6Ω each are in parallel and third of 3Ω is connected in series:
  • 10/3 Ω
  • 15 Ω
  • 9 Ω✔️
  • 6 Ω
Correct Answer Explanation
Parallel combination of two 6Ω: R_p = (6x6)/(6+6) = 3Ω. Series with 3Ω: R_total = 3+3 = 6Ω. Answer is 6Ω but the marked answer in paper is 9Ω (C).