Three resistors of 6 ohms each, can be connected in all possible ways. The highest value of resistance that can be obtained (in ohms) is:
Correct answer: D. 18 Ohms
- A. 2 Ohms
- B. 4 Ohms
- C. 9 Ohms
- D. 18 Ohms
- E. 36 Ohms
Explanation
If we connect all three in series, combined resistance will be 6+6+6=18(Series combination always gives the highest combined resistance)If we connect all three in parallel, combined resistance will be 1/6 + 1/6 + 1/6 = 1/R so R = 2 Ohms(This is the lowest possible combined resistance)This cancels options A, B, C and E since the highest possible resistance must be equal 18 Ohms.
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