Physics · Internal resistance, potential difference and emf of a cell, a combination of cells in series and parallel
The terminal voltage of a cell is equal to
The terminal voltage of a cell is equal to
- A. potential across external resistance.
- B. potential across internal resistance.
- C. potential across sum of external resistance and internal resistance.
- D. emf of cell.
Step-by-step solution
Terminal voltage V = IR (external resistance) when current flows, as V = E - Ir and I = E/(R+r), so V = IR. This equals the potential across external resistance.
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