H2 Physics 16 - Circuits: Potential Divider with Internal Resistance
What you will learn
- 12 V e.m.f. battery with internal resistance 2 ohms in series with R_1 = 4 and R_2 = 6 ohms.
- Kirchhoff loop: I = e.m.f. / (R_1 + R_2 + r) = 12 / 12 = 1.0 A.
- Terminal voltage V_term = e.m.f. minus I r = 12 minus 2 = 10 V; p.d.s across resistors 4 V and 6 V add up to 10 V.
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