A-LevelPhysicsD.C. circuits9702/12 · Oct/Nov 2023 · Q371 Mark
In the circuit shown, a battery of negligible internal resistance is connected in series with a pair of fixed resistors R₁ and R₂. [Figure 37.1] The circuit is to be used to test whether the electromotive force (e.m.f.) of a particular cell is 1.5 V. The cell is connected between terminals X and Y in parallel with R₂ and in series with a galvanometer. Which statement about the test is correct?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
AAny non-zero reading on the galvanometer means the cell has an e.m.f. of 1.5 V.
BThe battery does not need to have an e.m.f. of 6.0 V.
CThe cell may be connected either way round between X and Y.
DThe galvanometer does not need a scale calibrated in amperes.
✓ Correct answer
D: The galvanometer does not need a scale calibrated in amperes.
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