Exam-style question
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What is the output voltage from a potential divider when the total voltage is 12V and the resistances are 4Ω and 6Ω?.
- A.4.8V
- B.6.0V
- C.8.0V
- D.12.0V
Model answer
What a good answer should say
- 4.8V
Explanation
Why this works
Using the potential divider formula V_out = V_total * (R2 / (R1 + R2)), where V_total = 12V, R1 = 4Ω, and R2 = 6Ω. Substituting gives V_out = 12 * (6 / (4 + 6)) = 12 * (6 / 10) = 7.2V.
Common mistake
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