Mark Scheme (Results) November 2009

[Pages:19]Mark Scheme (Results) November 2009

IGCSE

IGCSE Physics (4420) Paper 1F

i

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4420_1F Nov 2009

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November 2009 Publications Code UG022384 All the material in this publication is copyright ? Edexcel Ltd 2009

ii

4420_1F Nov 2009

The following abbreviations have been used:

ecf error carried forward

dop dependent on previous

owtte or words to that effect

ora or reverse argument

Question Number 1 (a)

Acceptable Answers friction

Extra Information

accept `air resistance' or `friction with the air/table' or

`drag'

Mark 1

Question Number 1 (b)(i)

Question Number 1 (b)(ii)

Question Number 1 (b)(iii)

Acceptable Answers

gravitational (potential) (1)

kinetic

(1)

Acceptable Answers

heat

(1)

sound

(1)

Acceptable Answers

chemical

Extra Information do not credit just `potential' correct order essential Extra Information accept `thermal' either order

Extra Information

Mark 2

Mark 2

Mark 1

(Total 6 marks)

4420_1F Nov 2009

1

Question Number 2 (a)

Acceptable Answers 45

Extra Information

Mark 1

Question Number 2 (b)(i)

Acceptable Answers Hooke's

Extra Information accept minor misspellings

Mark 1

Question Number 2 (b)(ii)

Acceptable Answers extension is (directly) proportional to load

Extra Information

Mark 1

Question Number 2 (b)(iii)

Acceptable Answers

elastic

(1)

removed (1)

longer

(1)

Extra Information accept `taken off'

Mark 3

(Total 6 marks)

4420_1F Nov 2009

2

Question Number 3 (a)(i)

Acceptable Answers LDR

Extra Information accept ldr or Ldr

Mark 1

Question Number 3 (a)(ii)

Acceptable Answers

Extra Information

shine a light (on it)/increase the illumination

Mark 1

Question Number 3 (a)(iii)

Acceptable Answers cover it/put it in the dark

Question Number 3 (b)

Acceptable Answers thermistor

Extra Information

Mark

credit (1) if the answers to (a)(ii) and (a 1 are `correct' but reversed

Extra Information Mark

1

Question Number 3 (c)(i)

Acceptable Answers variable resistor

Extra Information allow `variable resistance'

Mark 1

Question Number 3 (c)(ii)

Acceptable Answers

Extra Information

....increased .... decreased or .... decreased .... increased

Mark 1

(Total 6 marks)

4420_1F Nov 2009

3

Question Number 4 (a)

Question Number 4 (b)

Question Number 4 (c)(i)

Question Number 4 (c)(ii)

Acceptable Answers

Extra Information

Mark

either energy ... information ... matter

or information ... energy 1 matter all correct in either case

Acceptable Answers

Extra Information Mark

any one of

?

sound (waves)

?

ultrasound (waves)

?

push and pull wave (on a

spring/slinky/in an earthquake)

P/primary (seismic waves)

do not credit just `seis 1 waves' or `in an earthquake'

Acceptable Answers

Extra Information Mark

transverse

or

1

electromagnetic/em

(waves)

Acceptable Answers

Extra Information

Mark

no ecf

do not credit `side to side

1

any one of

wave on a spring/slinky'

?

water (waves)

do not credit just `seismic

?

S/secondary (seismic waves) waves'

or `in an earthquake'

?

light (waves)

or gamma/Xray/ultraviolet/infra-red

/microwaves/radio

(Total 4 marks)

4420_1F Nov 2009

4

Question Number 5 (a)

Acceptable Answers

gamma rays sterilising medical

equipment

(1)

infra-red night vision equipment (1)

microwaves satellite transmissions (1)

ultra violet fluorescent lamps (1)

Extra Information Mark

if more than one link 4 to or from a box then cancel all the links to or from the box

Question Number 5 (b)

Acceptable Answers speed

Extra Information accept `velocity'

Mark 1

(Total 5 marks)

4420_1F Nov 2009

5

Question Number 6 (a)

Acceptable Answers all six ticked (2)

Extra Information

any four or five ticked (1) otherwise (0)

Mark 2

Question Number 6 (b)(i)

Question Number 6 (b)(ii)

Acceptable Answers

Extra Information

.....magnet .....wire..... coil.....field either all four correct (2) or any two correct (1)

Acceptable Answers

Extra Information

any two (1) each

?

increase the strength of the

magnet/field /magnetic field

?

spin/rotate/move the magnet

/field/coil faster

?

more turns on coil

?

larger area of coil

do not credit just `use a bigger magnet'

accept `greater (relative) movement'

Mark 2

Mark 2

(Total 6 marks)

4420_1F Nov 2009

6

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