Mark scheme for IGCSE Physics (0625/6) – Alternative to Practical October/November 2001
1
(a)(i)
(ii)
(b)
2
(a)(i)
(ii)
(b)
3
(a)(i)
(ii)
(iii)
(iv)
(b)
4
(a)(i)
(iii)
(b)(i)
(ii)
5
(a)(i)
(ii)
(b)
Graph:,
axes, labelled, d/mm against L / N
scales suitable
plots 6 correct
line judgement
reading to 1/2 square
clearly shown
Any two from:
horizontal rule at top
vertical rule in centre
clamped rule in centre
rule in centre resting on floor
1
1
3
1
1
1
0.22, 0.23, 0.17(5) correct
all correct
all to 2/3 s.f.
unit (at least once)
circuit:
lamps in parallel
voltmeter correct
ammeter correct (for any one lamp)
2
1
1
1
h = 18(mm)
t = 1.2mm
correct arithmetic
unit
d correct arithmetic
2/3 s.f.
mass on correct side
approximately twice as far from pivot (by eye)
(between 35 and 40)
1
1
1
1
1
1
1
35, 23, 32 correct
Any two from:
same initial temperature
same size cans
same distance from heater
same time
same room temperature
R
18 - 19°C
clear how obtained
1
lines correct, thin and neat
30o ± 1o
Any two from:
view base of pins
ensure vertical pins as far apart as possible
(or > 5cm)
1
1
1
2
10
1
1
1
8
1
8
2
1
1
1
6
(c)(i)
(ii)
(iii)
use a third pin
2.4 ± 0.1 cm
6.8 ± 0.1 cm
n = 1.3 - 1.5 (from correct arithmetic)
no unit and 2/3 s.f.
2
2
1
1
1
1
8