Physics · May / June 2025 · Paper 62 · Question 1
0625
As printed in the paper
The question as text
A student determines the internal diameter d of a test-tube. The apparatus is assembled as shown in Fig. 1.1. test-tube h water stand Fig. 1.1
Read automatically from the paper; the printed page above is exact.
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1(a)(i)[1]
3.4 (cm)
1(a)(ii)[1]
89 (cm3)
1(a)(iii)[1]
V = 11 (cm3)
1(b)[1]
read (the scale) at right angles / at eye level / perpendicularly
1(c)[4]
axes labelled with quantity and unit
suitable scales (occupying at least ½ the grid)
plots correct to ± ½ small square AND precise plots
good best-fit line judgement, thin, continuous line
1(d)[1]
some indication on the graph as to how gradient found
AND correct method of calculation of gradient i.e. Δy / Δx
1(e)(i)[1]
d = 2.1 ± 0.2 (cm)
1(e)(ii)[1]
any one from:
the line of best fit is approximatethe gradient is approximate / not accurate / can varytest-tube not a perfect cylinder / diameter of test-tube not uniform / test-tube curved at the bottomh includes the thickness of the glassdifficult to get ruler close to the test-tubemeasuring cylinder only reads to 1 cm3water sticks to the sides of the measuring cylinderdifficult to judge the position of the water level in the test-tube
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