JAMB Physics 2010 Objective — Question 35
Question 35 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2010 Objective paper, with the correct answer and a full explanation.
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35. A cell of emf 12 V and internal resistance 4 ohms is connected to an external resistor of resistance 2 ohms. Find the current flow. A. 4A B. 2A C. 3A D. 5A
- A. 4A
- B. 2ACorrect
- C. 3A
- D. 5A
Explanation
E=12V, R=2 ohms, r=4 ohms. E=IR+Ir=I(R+r). 12=I(2+4). 6I=12. I=2A.
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