JAMB Physics 2020 Objective — Question 16
Question 16 of 40 from the Joint Admissions and Matriculation Board (JAMB) Physics 2020 Objective paper, with the correct answer and a full explanation.
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16. What is the resistance that must be placed in parallel with a 25Ω to make a combined resistance of 15Ω
- A. A. 45Ω
- B. B. 37.5ΩCorrect
- C. C. 35.7Ω
- D. D. 35Ω
Explanation
1/15 = 1/25 + 1/x. 1/x = 1/15-1/25 = (5-3)/75 = 2/75. x = 37.5Ω.
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