Paper 3 Jun 2000 Physics

Answer guide for O Level Physics (5054/3) – Paper 3 Practical Test June 2000

1(a)(i),(ii) & (iii)

(c) (d) and (e)

All three measurements sensible and recorded to the nearest mm or better Diameters measured perpendicular to each other/ Height measured perpendicular to ends/ All measurements repeated Correct calculation of d and V with units for both quantities Reasonable value for m with unit and correct calculation of density to 2 or 3 s.f. with unit Value of density 1.2 to 1.6 g / cm3

2(a)

(b) (c)

General view correct: Magnet in the middle of the page Axis vertical Labelled North pole at top Correct field direction shown on at least one line with no contradictions Mark position of plotting compass point Place tail of plotting compass against point (Must be evidence of points on diagram) Good shape and correct arrows on all lines

3(a)

I set to 40 mA or Supervisor’s value and recorded with unit

(b) (c)

Circuit set up correctly without help of the Supervisor and with a voltage of approximately 3 V when the current is 40 mA, recorded with unit (or Supervisor’s voltage value) (setting up apparatus – no answer required) Correct calculation of R to 2/3 s.f. with correct unit Sensible value

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Answer guide for O Level Physics (5054/3) – Paper 3 Practical Test June 2000

4 4(a)

(b)

Readings At least 3values of t averaged and recorded to at least 0.1 s (2 values correctly averaged and recorded to 0.1 s only 1 mark) y found correctly with unit i.e. 40 .0 - d cm (d should be in the range 0.5 to 1.0 cm or Supervisor’s value) Table with units Range of y from 40.0 cm to at least 75.0 cm (40.0 cm point may be taken from (a) but must be plotted on the grid) Steady upward curve produced Graph Data occupies more than 1/2 page, axes labelled with units and y plotted against t Scale does not involve 3,6,7 or 9 6 points plotted correctly (5 points plotted correctly only 1)

(d) (e)

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Smooth curve Calculation Good tangent at y = 60.0 cm Triangle uses more than half the length of the plotted data in either direction Correct calculation with 2 or 3 s.f.

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