Question 9
Current ElectricityWhich of the circuits illustrated below will give a total resistance of 1 Ω?
- A.A
- B.B
- C.C
- D.D
- E.E
Show the answer and explanation
Answer: C (C)
Explanation
In C, 2 Ω, 3 Ω and 6 Ω are in parallel: 1/R = 1/2 + 1/3 + 1/6 = 1, so R = 1 Ω. The others give 11 Ω, 1.2 Ω, 4 Ω and 4.5 Ω.