Physics · Internal resistance, potential difference and emf of a cell, a combination of cells in series and parallel
Potentiometer measures potential more accurately because
Potentiometer measures potential more accurately because
- A. it measures potential in the open circuit
- B. it uses sensitive galvanometer for null deflection
- C. it uses high resistance potentiometer wire
- D. it measures potential in the closed circuit
Step-by-step solution
At null deflection, no current flows through the cell or circuit being measured, so the potential difference is measured under open circuit conditions, eliminating errors due to internal resistance. This is the primary reason for high accuracy.
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