Which of the following correctly expresses the formula for electrical power (P) in terms of EMF (E), internal resistance (r), and external resistance (R)?
University of Ilorin PHY108 2025 past question
- P = E²/(R + r)
- P = E²R/(R + r)²
- P = E/(R + r)
- P = E²r/(R + r)²
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