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M10/4/PHYSI/SP2/ENG/TZ1/XX+

22106511

Physics
standard level
PaPer 2
Candidate session number

Monday 10 May 2010 (afternoon)
0

1 hour 15 minutes

0

INSTRUCTIONS TO CANDIDATES






Write your session number in the boxes above.
Do not open this examination paper until instructed to do so. Section A: answer all of Section A in the spaces provided.
Section B: answer one question from Section B in the spaces provided. At the end of the examination, indicate the numbers of the questions answered in the candidate box on your cover sheet.

19 pages
© International Baccalaureate Organization 2010

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M10/4/PHYSI/SP2/ENG/TZ1/XX+

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M10/4/PHYSI/SP2/ENG/TZ1/XX+

SecTion a
Answer all the questions in the spaces provided.
a1. Thisquestionisaboutelectricalresistance.

ThegraphshowsthevariationwithtemperatureToftheresistanceRofanelectricalcomponent. 6000

5000

4000

R/ Ω

3000

2000

1000

0

(a)

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300

T/K

350

400

Astudenthypothesizesthattheresistanceisinverselyproportionaltothetemperature. Usedatafromthegraphtoshowwhetherthehypothesisissupported.

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[3]

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Turn over

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(Question A1 continued)

(b) Asecondstudentsuggeststhattherelationshipisoftheform

lgR =a +

b
T

whereaandbareconstants.

Thestudentplotsthegraphbelow.Errorbarshavebeenincludedforthesakeofclarity.

5

4

3

lg(R / Ω )

2

1

0

–1

–2

–3

0

1

2
1
/ ×10−3 K −1
T

3

4

(This question continues on the following page)

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(Question A1 continued)

(i)

Explainhowthegraphdrawncouldbeusedasevidencetosupportthestudent’s suggestion.
[2]

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[4]

(ii) Usethegraphtodeterminetheconstantsaandb.

b: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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