Combination Of Cells
Three cells each of EMF 2 V and internal resistance 1 Ω are connected in series. What is the total EMF and internal resistance?
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About This Question
- Subject
- physics
- Chapter
- current electricity
- Topic
- combination of cells
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
6 V, 3 Ω
- Cells in Series Rule: When cells are in series assisting each other:
- Total EMF: Enet=E1+E2+E3
- Total Internal Resistance: rnet=r1+r2+r3
- Calculation of EMF:
- E=2+2+2=6 V.
- Calculation of Resistance:
- r=1+1+1=3 Ω.
- Result: The equivalent battery has 6 Volts and 3 Ohms of internal resistance.
This easy difficulty physics question is from the chapter current electricity, covering the topic of combination of cells. It appeared in the 2025 exam.
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