Mark Scheme (Results)
November 2012
GCSE Physics
5PH2H/01

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November 2012
Publications Code UG034070
All the material in this publication is copyright
© Pearson Education Ltd 2012

GCSE Physics 5PH2H/01 Mark Scheme – November 2012
Question
Number
1(a)(i)

Answer

Acceptable answers

Mark
(1)

B
Question
Number
1(a)(ii)

Question
Number
1(a)(iii)

Answer

Acceptable answers

Mark

substitution
(1)
V = 0.5 x 12 evaluation (1)
V = 6 (V)

Correct answer with no working shown gains two marks.

(2)

Answer

Acceptable answers

Mark

They(both) would increase for two marks

(2)

Answer

Acceptable answers

Mark

(current/it) would decrease
(1)

smaller/lower/reduce/less
Ignore slowing down

(1)

Answer

Acceptable answers

Mark

•

•

P / ammeter reading would increase. (1)
Q / voltmeter reading would increase
(1)

Question
Number
1(a)(iv)

Question
Number
1(b)

component symbol graph

All three lines correct for 2 marks
One or two lines correct for 1 mark More than one line against any box cannot score more than 1 mark in total.

(2)

Question
Number
2(a) (i)

Question
Number
2(a) (ii)

Answer

Acceptable answers

B

Mark
(1)

Answer

Acceptable answers

Any one of the following
Rocks
Food
Radon gas
Cosmic rays
Own bodies
Fall-out
Sun/stars

Mark
(1)

Plausible named food such as coffee, brazil nut, bananas
Space

(1)

Specified medical/industrial use of x-rays
Ignore smoke alarms, power stations (in normal use)

Question
Number
2(a) (iii)

Question
Number
2(a) (iv)

Answer

Acceptable answers

An explanation linking
• personal circumstances such as geographical location nature of their work lifestyle (1)
• the consequences such as radiation from radon gas/particular rocks/fallout (eg Chernobyl) greater exposure to x-rays greater exposure to cosmic rays (1)
Answer
D

Mark

(2)

Acceptable answers

Mark
(1)

Question
Number
2(b) (i)

Question
Number
2(b) (ii)

Question
Number
2(b) (iii)

Answer

Acceptable answers

From the graph
Time taken to fall (from 120 to)
60
(1)
= 8 days
(1)

Mark
(2)

Any other suitable pair of readings from graph
8.1, 8.2
Full marks for correct answer even if no working is evident

Answer

Acceptable answers

Mark

2.2 (days)

between 2.0 and 2.5
2

(1)

Answer

Acceptable answers

Mark

Any one of the following:
• Mutation of dna
• Ionisation of cells
• (Increases risk of) cancer
(1)

damage / mutate cells

(1)

(1)

Question
Number
3(a)(i)

Question
Number
3(a) (ii)

Answer

Acceptable answers

B

Mark
(1)

Answer

Acceptable answers

Mark

(equivalent to a) helium nucleus

Two protons and two neutrons for 2 marks

(2)

helium/mass of 4 for 1 mark charge of +2 for 1 mark correct statement of any property for 1 mark
Question
Number
3 (b)

Answer
A description to include any four of the following
• neutron
• is captured by a U-235 nucleus •
•
•
•
•

Question
Number
3 (c)

nucleus (is) unstable nucleus splits into 2 daughter nuclei (of similar size)
(2 or more) neutrons are released energy is released

Answer

Acceptable answers

•
•

collides with /absorbed by
(U-235) nucleus metastable •

Mark

named isotopes
(4)

Acceptable answers

Mark

Reverse argument

(2)

An explanation linking
• moderator slows down
(absorbs energy from) neutrons •

more likely to be captured
/cause fission (if it collides with a U-235 nuclei)

Question
Number
4 (a)

Answer

Acceptable answers

Mark

C
(1)

Question
Number
4 a(ii)

Answer

Acceptable answers

Mark

In the cloud : reason 3
(1)
At the tower: reason 2
(1)
(2)

Question
Number
4 a(iii)

Question
Number
4 (b)

Answer

Acceptable answers

An explanation linking
• the charge was neutralised
(1)
• by a transfer/flow of electrons (1)
Answer

Mark

Discharged/ becomes zero

(2)

gained electrons / negative charge Acceptable answers

substitution
(1)
52 = 2600 x time

Mark

T=Q/I

transposition time = 52 / 2600
(1)
evaluation
0.02 (s)

Full marks for correct answer even if no working is evident

(3)

Acceptable answers

Mark

(1)
Question
Number
4 (c)

Answer
An explanation linking two of the following •

charges flow through the metal wire

•

preventing build-up of
(excess) charge

mention of earthing

to the ground / earth

•

(2)

discharged / neutral
(2)

all objects at the same potential

Question
Number
5(a)(i)

Answer

Acceptable answers

Mark

Full marks for correct answer even if no working is evident

(2)

Answer

Acceptable answers

Mark

21 J

Ecf from (a)(i)

(1)

Answer

Acceptable answers

Mark

substitution
(1)
KE = ½ x 27 x (2.3)2 evaluation (1)
= 71.4
(which is approx 71)

V=2.29 gains two marks
Reverse argument which shows that V = √5.3 gains two marks

(2)

Answer

Acceptable answers

Mark

substitution
(1)
work done = 84 x 0.25 evaluation (1)
21(J)

Question
Number
5(a)(ii)

Question
Number
5(a)(iii)

Question
Number
5 (a)(iv)

B

(1)

Question
Number
QWC *5(b)

Leve l 1

Mark
0
1-2

Indicative Content

Mark

An explanation linking some of the following points
• kinetic energy varies during swing
• kinetic energy maximum at bottom of swing
• kinetic energy minimum at top of swing
• gravitational potential energy(gpe) varies during swing
• gpe maximum at top of swing
• gpe minimum at bottom of swing
• (continuous) interchange of KE and gpe
• total amount of energy is constant during one swing
• over a number of swings max KE and max PE decreases
• energy is dissipated/’lost’ to surroundings
• because of air resistance / friction
• amplitude/size of swings decrease ( as energy ‘lost’ to surroundings) (6)

ignore references to momentum
Descriptor
No rewardable content
• a limited explanation which states some facts e.g.
(max) Kinetic energy decreases over time. KE will transfer to GPE. or KE increases and decreases over one swing. The height which the swing reaches gets less over time.
•

2

3-4

3

5-6

the answer communicates ideas using simple language and uses limited scientific terminology
• spelling, punctuation and grammar are used with limited accuracy
• a simple explanation with links between facts; either over one period of oscillation or over several periods of oscillations.
Kinetic energy decreases as he gets higher and the GPE increases.
There is a continuous interchange of KE and gpe as he swings. or KE is gradually transferred to heat so swing rises to a slightly lower height each time.
• the answer communicates ideas showing some evidence of clarity and organisation and uses scientific terminology appropriately
• spelling, punctuation and grammar are used with some accuracy
• a detailed explanation with links between facts over one period of oscillation and over several periods of oscillations e.g. kinetic energy is at a maximum at bottom of swing There is a continuous interchange of KE and gpe. KE (and gpe) reduce over a number of swings as energy is dissipated to the surroundings due to friction.
•
•

the answer communicates ideas clearly and coherently uses a range of scientific terminology accurately spelling, punctuation and grammar are used with few errors

Question
Number
6 (a) (i)

Question
Number
6 (a) (ii)

Question
Number
6 (b)

Answer

Acceptable answers

C

Mark
(1)

Answer

Acceptable answers

Mark

acceleration

Recognisable mis-spellings
More than one word written scores zero EXCEPT for the phrase Acceleration due to gravity which scores 1 mark

(1)

Answer

Acceptable answers

Mark

Substitution weight = 0.00008 x 10

(2)
(1)

evaluation

8 x 10-4

0.0008 (N)
(1)
Question
Number
6 (c)

1/1250

Answer

Acceptable answers

Mark

Substitution speed = 13 / 1.7

An answer which rounds to 7.6 eg 7.647
7.65

(2)

evaluation

(1)

7.6 (m/s)

7.7
(1)

Question
Number
QWC *6(d)

Leve l 1

0

Indicative Content
A explanation including some of the following points
• drops near the top are accelerating
• due to force of gravity
• travel a greater distance in given time
• there is air resistance on the drops as they fall
• this increases with velocity
• resultant force is downward
• this reduces resultant force
• eventually resultant force is zero
• drops have reached terminal/ maximum velocity
• drops near bottom are all travelling at terminal velocity
• so travel same distance in given time

1-2

•

•
3-4

(6)

No rewardable content

•
2

Mark

•

a limited explanation such as one which correctly addresses either why the drops at the bottom are evenly spaced or why the drops at the top are not
e.g.
drops at bottom are all going at the same speed
OR
drops at top are speeding up the answer communicates ideas using simple language and uses limited scientific terminology spelling, punctuation and grammar are used with limited accuracy a simple explanation such as a correct comparison of the motion of the drops at top and bottom e.g. drops at bottom are travelling at terminal velocity whereas drops at top are still accelerating.

Or

•
3

5-6

•
•

•
•

a complete explanation of motion at either top or bottom e.g.at the bottom, air resistance and gravity forces are balanced so they travel at constant speed the answer communicates ideas showing some evidence of clarity and organisation and uses scientific terminology appropriately spelling, punctuation and grammar are used with some accuracy a detailed explanation such as one which explains why the motion of the drops at top and bottom are different e.g.
The drops were initially accelerating due to a resultant force downwards. The acceleration decreased as they fell and eventually reached zero. With no acceleration their velocity was constant and so equal distance travelled in given time at the bottom. the answer communicates ideas clearly and coherently uses a range of scientific terminology accurately spelling, punctuation and grammar are used with few errors

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Order Code UG034070 November 2012

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