Exam-style question
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In a practical investigation of a cell's emf and internal resistance, which measurement is essential to determine the internal resistance?.
- A.The emf of the cell
- B.The current flowing through the circuit
- C.The resistance of the load
- D.The voltage across the load
Model answer
What a good answer should say
- The current flowing through the circuit
Explanation
Why this works
To determine the internal resistance of a cell, it is essential to measure the current flowing through the circuit, as this allows for calculations involving the emf and terminal voltage.
Common mistake
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