A-Level AS Physics Paper I | Verified Question Paper & Answers (Latest Format)

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AS
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Paper 2 I




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Iwrite
Section IA box


Answer Iall Iquestions Iin Ithis Isection.


0 1 AIstudent 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
Ifrom 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.




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


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Do Inot
Iwrite
box
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 IPQI=III %


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




frequency I= Hz




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