CIE A Level Physics復習筆記10.1.7 Resistors in Series
Deriving the Equation for Resistors in Series
- In a series circuit, the combined resistance of two or more resistors is the sum of the individual resistances
- In a series circuit:
- The current is the same through all resistors
- The potential difference is split between all the resistors
- The equation for combined resistors in series is derived using Kirchhoff’s laws:
Resistors in Series
- When two or more components are connected in series:
- The combined resistance of the components is equal to the sum of individual resistances
Resistors connected in series
Combined resistance of two or more resistors in series equation
Worked Example
The combined resistance?R?in the following series circuit is 60 Ω.What is the resistance value of R2?
A.? ? ?100 Ω? ? ? ? ? ? ? ?B.? ? ?30 Ω? ? ? ? ? ? ? ?C.? ? ?20 Ω? ? ? ? ? ? ? ?D.? ? ?40 Ω
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