Exam-style question
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If a potential divider is used to supply a voltage of 5V from a 10V source, what is the ratio of the resistances R1 to R2 if R1 is connected to the source voltage?.
- A.1:1
- B.1:2
- C.2:1
- D.1:4
Model answer
What a good answer should say
- 1:1
Explanation
Why this works
To achieve an output voltage of 5V from a 10V source, the resistances must be equal (R1 = R2). This is because the output voltage is half of the input voltage, indicating a 1:1 ratio of resistances.
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