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A total resistance of 400 Ω is obtained by connecting four resistors of 100 Ω each, every resistor having a tolerance of 5%. What is the tolerance of the resulting combination?
- 5%
- 10%
- 15%
- 20%
Correct answer: 5%
Solution
The total resistance of 400 Ω is achieved by connecting the resistors in series, where the tolerance of the combination remains the same as that of the individual resistors, which is 5%. Since the resistors are identical and in series, their tolerances do not compound, thus the overall tolerance remains at 5%.
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