alleryStart learning →How is the equivalent resistance of several resistors joined in series worked out?
ABy adding the reciprocals
BBy taking the largest one
CBy taking the smallest one
DBy adding the resistances
Answer & Solution
Correct answer: D. By adding the resistances
1. The equivalent resistance is the single resistance that could replace the whole group.
2. For resistors in series the equivalent resistance is just the sum of all the resistances.
3. Adding reciprocals is the method for resistors in parallel, so that option names the wrong arrangement.
4. Adding a resistor in series therefore always raises the total resistance.
_Source: Siyavula Physical Sciences Grade 11 (Everything Science, CC BY 4.0), Chapter 11: Electric circuits_
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