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- PHY102 Physics II © Dr.Cem Özdoğan
- 27-6 Potential Across a Real Battery: Grounding a Circuit
- If the internal resistance r of the battery in the previous case were zero, V would be equal to the emf ξ of the battery-namely, 12 V. (Fig 27.6)
- However, since r =2.0 Ω, V is less than ξ.
- Grounding a circuit usually means connecting the circuit to a conducting path to Earth’s surface, and such a connection means that the potential is defined to be zero at the grounding point in the circuit.
- In Fig. 27-7a, the potential at a is defined to be Va =0 and the potential at b is Vb =8.0 V.