# Practical resistors

### Explanation of question 3

Two resistors, each of quoted value 10k and tolerance 20%, are connected in series. The equivalent resistance will have a value between

1. 8k and 12k
2. 8k and 20k
3. 16k and 24k
4. 20k and 24k

The answer is :- 3 Lowest value for each resistor is 10k - 20% = 8k. Highest value for each resistor is 10k + 20% = 12k. When in series, lowest total resistance = 8 + 8 = 16k. When in series, highest total resistance = 12 + 12 = 24k.

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