AQA AS PHYSICS PaperI2

ACADEMICMASTER




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AS
PHYSICS
Paper 2 I




Time allowed: 1 hour 30 minutes
I I I I I



Materials
You are advised to spend about 35
I I I I I I I



For Ithis Ipaper Iyou Imust Ihave: minutes on Section C
I I I I

 a Ipencil Iand Ia Iruler
 a Iscientific Icalculator For IExaminer’s IUse
 a IData Iand IFormulae IBooklet Question Mark
 a Iprotractor.
1
Instructions 2
 Use Iblack Iink Ior Iblack Iball-point Ipen. 3
 Fill Iin Ithe Iboxes Iat Ithe Itop Iof Ithis Ipage.
4
 Answer Iall Iquestions.
 You Imust Ianswer Ithe Iquestions Iin Ithe Ispaces Iprovided. IDo Inot Iwrite 5
Ioutside Ithe Ibox Iaround Ieach Ipage Ior Ion Iblank Ipages. 6–35
 If Iyou Ineed Iextra Ispace Ifor Iyour Ianswer(s), Iuse Ithe Ilined Ipages Iat Ithe Iend Iof
TOTAL
Ithis Ibook. I Write Ithe Iquestion Inumber Iagainst Iyour Ianswer(s).

 Do Iall Irough Iwork Iin Ithis Ibook. ICross Ithrough Iany Iwork Iyou Ido Inot Iwant
Ito Ibe Imarked.

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Information
 The Imarks Ifor Iquestions Iare Ishown Iin Ibrackets.
 The Imaximum Imark Ifor Ithis Ipaper Iis I70.
 You Iare Iexpected Ito Iuse Ia Iscientific Icalculator Iwhere Iappropriate.
 A IData Iand IFormulae IBooklet Iis Iprovided Ias Ia Iloose Iinsert.




*JUN217407201*
IB/M/Jun21/E7 7407/2

, 2
Do Inot
Iwrite
Section IA box Ithe
Ioutside



Answer Iall Iquestions Iin Ithis Isection.


0 1 A Istudent Iinvestigates Istationary Iwaves Iusing Imicrowaves.

Figure I1 Ishows Ia Imetre Iruler Ifixed Ito Ia Ibench. IThe Istudent Iplaces Ia Imicrowave
Itransmitter IT Iat Ione Iend Iof Ithe Iruler Iand Ia Ivertical Imetal Ireflector IR Iat Ithe Iother Iend.IR

Iis Iat Ia Iright Iangle Ito Ithe Iruler.




Figure I1




The Istudent Iplaces Ia Imicrowave Idetector ID Iapproximately Ione-third Iof Ithe Idistance
If rom IT Ito IR. I When IT Iis Iswitched Ioff, Ithe Imicroammeter Iconnected Ito ID Ireads Izero.



When IT Iis Iswitched Ion, Istationary Iwaves Iare Iproduced Ibetween IT Iand IR, Iand Ithe
Imicroammeter Iregisters Ia Icurrent. I When Ithe Istudent Imoves ID Ialong Ithe Iruler, Ithe

size Iof Ithe Icurrent Ichanges Ibetween Imaximum Iand Iminimum Ivalues.




*02*
IB/M/Jun21/7407/2

, 3
Do Inot
Iwrite

The Istudent Imeasures Ithe Icurrent Iat Idifferent Ipositions Iof ID Ialong Ithe Iruler Ito Iidentify box Ithe
Ioutside


Ia Iposition IP Iof Ithe Iminimum Icurrent.



Figure I2 Iis Ia Iplot Iof Ithe Imeasurements Itaken Inear IP.

Figure I2




0 1 . 1 Draw Ia Iline Iof Ibest Ifit Ifor Ithese Idata.
[2 Imarks]


0 1 . 2 State Ia Ivalue Ifor Ithe Iposition Iof IP.
[1 Imark]




position Iof IP I= cm

Question I1 Icontinues Ion Ithe Inext Ipage

Turn Iover I►


*03*
IB/M/Jun21/7407/2

, 4
Do Inot
Iwrite
box Ithe
Ioutside
The Istudent Imoves ID Ialong Ithe Imetre Iruler Itowards IR Iand Iobserves Ia Iseries Iof
Imaximum Iand Iminimum Ireadings Ion Ithe Imicroammeter. IHe Iidentifies IQ Ias Ithe

Iposition Iof Ithe I8th Iminimum Icurrent Ifrom IP. IHe Imeasures Ithe Idistance IPQ Ito

Ibe I50.9 Icm, Ias Ishown Iin IFigure I3.




Figure I3




0 1 . 3 The Iabsolute Iuncertainty Iin Iidentifying Iany Iminimum Icurrent Iis I± I0.2 Icm.

Determine Ithe Ipercentage Iuncertainty Iin Ithe Idistance IPQ.
[2 Imarks]




percentage Iuncertainty Iin IPQ I= II I %


0 1 . 4 Deduce Ithe Ifrequency Iof Ithe Imicrowaves Iproduced Iby IT.
[3 Imarks]




frequency I= Hz




*04*
IB/M/Jun21/7407/2