A cell of internal resistance r supplies current to a 6.0Ω resistor and its efficiency
PHYSICS
JAMB 2001
A cell of internal resistance r supplies current to a 6.0Ω resistor and its efficiency is 75%. Find the value of r.
- A. 4.5Ω
- B. 1.0Ω
- C. 8.0Ω
- D. 2.0Ω
Correct Answer: D. 2.0Ω
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