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GCE JUN 2006 : A2 2 Electromagnetism and Nuclear Physics (Irish Medium)

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Uimhir L rionaid 71 Uimhir Iarrth ra ADVANCED General Certificate of Education 2006 Fisic Aonad Meas naithe A2 2 ag meas n Mod l 5: Leictreamaighn adas agus Fisic N icl ach [A2Y21] D HAOINE 9 MEITHEAMH, MAIDIN AM 1 uair 30 n im ad. TREOIR D IARRTH IR Scr obh d Uimhir L rionaid agus d Uimhir Iarrth ra sna sp sanna chuige sin ag barr an leathanaigh seo. Freagair gach ceann de na s cheist. Scr obh do fhreagra sna sp sanna chuige sin sa cheistph ip ar seo. EOLAS D IARRTH IR Is 90 an marc ioml n don ph ip ar seo. Meas n far caighde n na cumars ide scr ofa i gceisteanna 2(b) agus 6(b)(vii), (d)(ii) agus e(iii). L ir onn figi ir idir l ib n ar thaobh na l imhe deise de leathanaigh na marcanna at ag dul do gach ceist n do gach cuid de cheist. Tarraing tear d aird ar an Bhileog Sonra agus Foirml at taobh istigh den cheistph ip ar seo. Tig leat ireamh n leictreonach a s id. Cuireann Ceist 6 le riachtanas mheas n sionoptach na Sonra ochta. Moltar duit tuairim is 45 n im ad a chaitheamh ar cheisteanna 1 5, agus tuairim is 45 n im ad ar cheist 6. Don Scr daitheoir amh in Uimhir Ceiste Marcanna 1 2 3 4 5 6 Marc Ioml n A2Y2S6 2644.03 M bh onn luachanna na dtairiseach fisiceach de dh th ort chun ceist ar bith ar an ph ip ar seo a fhreagairt, t siad le f il ar an Bhileog Sonra agus Foirml . Scr daitheoir Amh in Marcanna Athmharc Freagair gach ceann de na s cheist. 1 (a) T toilleoir neamhluchtaithe C sraithcheangailte le friot ir R, cadhnra agus lasc, mar a thaispe ntar in F or 1.1. F or 1.1 Ag am t = 0 druidtear an lasc. (i) Ar F or 1.2 sceitse il graf le comhathr na difr ochta poit insil VR trasna ar an fhriot ir R le ham t a thaispe int. [1] F or 1.2 (ii) Ar F or 1.3 sceitse il graf le comhathr an luchta QC ar an toilleoir le difr ocht phoit insil VC trasna air a thaispe int. [1] A2Y2S6 2644.03 F or 1.3 2 [Turn over (b) T 3 thoilleoir sraithcheangailte de chadhnra 12.0 V mar a thaispe ntar in F or 1.4. T toilleas anaithnid ag ceann amh in de na toilleoir ; t an toilleoir seo lip adaithe C. T toilleas an d thoilleoir eile marc ilte ar an l ar id. Scr daitheoir Amh in Marcanna Athmharc F or 1.4 Is 1.44 10 4 J an fuinneamh ioml n at st r ilte sna 3 thoilleoir. (i) Faigh toilleas ioml n na 3 thoilleoir at sraithcheangailte. Toilleas ioml n = _________ F [3] (ii) Faigh toilleas an toilleora anaithnid. Toilleas = _________ F A2Y2S6 2644.03 [3] 3 [Tiontaigh an leathanach 2 I gcuid (b) den cheist seo ba ch ir duit do fhreagra a thabhairt i bpr s lean nach, san it ar cu sin. Meas n far th ar chaighde n na cumars ide scr ofa. Scr daitheoir Amh in Marcanna Athmharc (a) (i) An floscdhl s maighn adach B i ngar do shreang fhada dh reach a bhfuil sruth iompar aici, sceitse il graf ar F or 2.1 lena thaispe int cad mar a athra onn s leis an sruth I sa tsreang. [1] F or 2.1 (ii) An floscdhl s maighn adach B i ngar do shreang fhada dh reach a bhfuil sruth iompar aici, sceitse il graf ar F or 2.2 lena thaispe int cad mar a athra onn s leis an fhad a n tsreang. [1] F or 2.2 A2Y2S6 2644.03 4 [Turn over (b) Cuir s os ar thurgnamh le fiosr ch n a dh anamh ar an d igh a mb onn an floscdhl s maighn adach taobh istigh de sholan ideach fada d reach ag brath ar an sruth sa solan ideach. Scr daitheoir Amh in Marcanna Athmharc Bunaigh do fhreagra ar na ceannteidil a thugtar anseo th os. (i) Sceitse lip adaithe den fhearas [3] (ii) N s imeachta turgnamhach ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ____________________________________________________ [3] (iii) Graf cu le patr n na dtortha a l iri [1] (iv) Concl id _____________________________________________ ______________________________________________________ ______________________________________________________ ____________________________________________________ [2] Caighde n na cumars ide scr ofa A2Y2S6 2644.03 [1] 5 [Tiontaigh an leathanach 3 (a) Is an bunlucht e at i gceist leis an chandam de lucht leictreach. Scr daitheoir Amh in Marcanna Athmharc (i) M nigh a bhfuil i gceist leis an r iteas seo i dtaca leis an mh id de lucht leictreach ar bith. ______________________________________________________ ______________________________________________________ ____________________________________________________ [2] (ii) Ainmnigh turgnamh amh in ina bhfuil fianaise ar chandam ch n luchta. Cad mar at an candam ch n luchta dhearbh ag tortha an turgnaimh seo? ______________________________________________________ ______________________________________________________ ____________________________________________________ [2] A2Y2S6 2644.03 6 [Turn over (b) Leictreon a bhfuil luas de 2.5 106 m s 1 faoi, t ann s isteach i r imse maighn adach aonfhoirmeach dar floscdhl s 150 mT ar uillinn de 90 le treo an r imse, mar a thaispe ntar in F or 3.1. Scr daitheoir Amh in Marcanna Athmharc magnetic flux density 150 mT electron path v = 2.5 106 m s 1 F or 3.1 (i) Faigh m id an fh rsa ar an leictreon agus ag dul isteach sa r imse. F rsa = _________ N [3] (ii) Luaigh treo an fh rsa ar an leictreon. ______________________________________________________ ____________________________________________________ [1] A2Y2S6 2644.03 7 [Tiontaigh an leathanach 4 (a) Le strucht r an adaimh a fhiosr , dh righ Rutherford, Geiger agus Marsden ga de ch ithn n alfa ar scragall ir a bh iontach tana . Fuair siad amach gur scaipeadh na c ithn n ar uillinneacha a bh ag athr idir 0 agus 180 i leith threo an gha ionsaithigh. Bh uillinn scaipthe nialais ag na c ithn n uile nach m r; cialla onn sin go ndeachaigh siad caol d reach tr d an scragall. Ach th inig l on an-bheag acu d reach ar ais; cialla onn sin go raibh 180 san uillinn scaipthe. Scr daitheoir Amh in Marcanna Athmharc (i) An uillinn scaipthe nialais a bh ag na c ithn n uile nach m r, cad an choncl id is f idir a dh anamh as an fh ric seo? ______________________________________________________ ____________________________________________________ [1] (ii) N raibh uillinn scaipthe de 180 ach ag f orbheag n de na c ithn n alfa, luaigh dh choncl id is f idir a dh anamh as an fh ric seo. 1. ____________________________________________________ ______________________________________________________ 2. ____________________________________________________ ____________________________________________________ [2] A2Y2S6 2644.03 8 [Turn over (b) D igh eile le h bhar a thaisc aladh is ea ga de leictreoin a dh ri ar scann n iontach tana , scann n carb in (graif t), mar shampla. Scr daitheoir Amh in Marcanna Athmharc (i) Cuir s os ar an phatr n scaipthe a fuarthas sa ch s seo. L irigh do fhreagra le sceitse. ______________________________________________________ ______________________________________________________ ____________________________________________________ [2] (ii) Luaigh an t-air a bh l iri ag na leictreoin agus a d fh g go raibh an cine l seo de phatr n scaipthe ann. ____________________________________________________ [1] (c) Rinneadh turgnamh Rutherford i bhfead n folmhaithe. An turgnamh ina mb onn leictreoin scaipeadh, caithfear a dh anamh i bhfol s. M nigh cad chuige a mb onn fol s riachtanach. _________________________________________________________ _______________________________________________________ [1] A2Y2S6 2644.03 9 [Tiontaigh an leathanach 5 (a) Comhl naigh na cothrom id seo a leanas do mheath n icl ach tr d an n icl nuimhir chu n an phr t nuimhir chu a chur sna bosca chuige sin th os. (i) (ii) 6C 14N 238U 90Th + 0e 1 + 4He 2 Scr daitheoir Amh in Marcanna Athmharc [2] [2] (b) Le faireog th or ideach duine a mhonat iri , instealltar an duine le rianaire radaighn omhach ina bhfuil 5.0 1014 adamh d Iaid n-131. Is 8.0 l an leathr at ag Iaid n-131. (i) Faigh an l on de n icl is neamh-mheathlaithe d Iaid n-131 a bheidh f gtha i ndiaidh 29.0 l . An l on de n icl is neamh-mheathlaithe = _____________ [3] (ii) Faigh an ghn omha ocht a bheidh san instealladh d Iaid n-131 i ndiaidh 29.0 l . Tabhair do fhreagra ina bheicireil . Gn omha ocht = _____________ Bq A2Y2S6 2644.03 10 [3] [Turn over 6 Ceist tuisceana Scr daitheoir Amh in Marcanna Athmharc Cuireann an cheist seo le riachtanas mheas n sionoptach na Sonra ochta. Sa fhreagra agat, t thar ag s il go dt gfaidh t le ch ile agus go gcuirfidh t i bhfeidhm iad, prionsabail agus comhth acsanna r ims eile na fisice, agus go mbainfidh t s id as smaointe agus scileanna na fisice sna c sanna ar leith a gcuirtear s os orthu. Moltar duit tuairim is 45 n im ad a chaitheamh ar an cheist seo. L igh an sliocht go c ramach agus freagair na ceisteanna a leanann. I gcodanna (b)(vii), d(ii) agus (e)(iii) den cheist seo ba ch ir duit do fhreagra a thabhairt i bpr s lean nach. Meas n far th ar chaighde n na cumars ide scr ofa. Fuaimfhuinneamh F adann teagmhais n d rtha m ideanna m ra d fhuaimfhuinneamh a ghini int. Comhathruithe br sa chluas is c is leis an mhoth istitheach a spreagtar ag a macasamhail d imeachta De ghn th b onn fuaimfhuinneamh ghini int ag foinse igin de chreathadh, n ag foinse de shuaiteacht aeir. L ne 1 5 An call n a gineadh ag br chta bolc nacha Krakatoa in 1883, is sampla amh in sin de theagmhas n d rtha inar gineadh m id iontach m r d fhuaimfhuinneamh. S ltear go bhfuil an call n a gineadh ag na br chta seo cothrom le n n os m n an call n a ghinf ag pl ascadh 10 n icl ach nua-aimseartha. Mar thoradh ar bhr chtadh amh in 3 de charraig in airde, i bhfoirm scamall d irigh tuairim is 4.2 km deannaigh, go ceartingearach go dt 25 km san atmaisf ar. M rchuid an fhuaimfhuinnimh a gineadh ag an bhr chtadh seo, tharl dh s go haonfhoirmeach thar thr imse ama de thuairim is 150 s, agus 15 n bheadh ann ach aon mhilli n cuid de ch atad n amh in den fhuinneamh ioml n a scaoileadh. F adtar glacadh leis go raibh an fhuaim hast go haonfhoirmeach phoncfhoinse bhar lach ag l r an bhr chta. Is leis an chothrom id seo th os a thugtar an fhuaimdh ine I ag pointe dar fad d n l r P I = Cothrom id 6.1 20 2 d2 an it gurb P cumhacht fuaime na foinse. In Cothrom id 6.1 glactar leis go bhfuil an talamh thart ar an fhoinse pl nach agus f orfhrithchaiteach, sa d igh go rada tear an fuaimfhuinneamh isteach i leathsf ar. Is gn th bhachtach chomh maith fuaimfhuinneamh i dtimpeallacht 25 thionscla och a chaithfidh Rial ch in Sl inte agus S bh ilteachta ar Obair a chomhl onadh. F gann na rial ch in seo go gcaithfidh na fostaithe trialacha closmh adrachta a dh anamh m bh onn guais fuaime a dhul i bhfeidhm orthu. I dtriail amh in acu, buna tear caillteanas isteachta (C ) ag l on de mhinic ochta sa raon 125 Hz go 30 12 000 Hz. A2Y2S6 2644.03 11 [Tiontaigh an leathanach I gc s gach ceann de na minic ochta sa raon, sainmh n tear leibh al osd ine mar an norm. Is at sa norm n an leibh al tagartha na dtomhaistear caillteanas isteachta. Cionn is nach bhfuil cluas an 35 duine comh-mhoth lach ag na minic ochta uile, b onn tagairt noirm 5 dhifri il ann i ngach ceann de na trialacha minic ochta. Sainmh n tear caillteanas isteachta mar an spreagadh breise os cionn an noirm a bh onn de dh th ar an duine le go mbeidh s /s in ann an ton trialach a chluinstin agus freagairt d . Tomhaistear caillteanas isteachta mar dB 40 os cionn leibh al fuaimdh ine an noirm ag gach minic ocht trialach. Scr daitheoir Amh in Marcanna Athmharc B onn closmh adar toin on in s id ina macasamhail de thriail. Is at ann n ginead ir comhartha leictreonach ag a mb onn toin ona dt irgeadh ag na minic ochta trialach (mar shampla, 125 Hz, 250 Hz, 500 Hz, 1000 Hz, 2000 Hz, 4000 Hz, 8000 Hz, 12 000 Hz), tanaitheoir calabraithe a mb onn leibh al aschur an ghinead ra choigeart aige i 45 gc imeanna de 5 dB agus lasc leis an chomhartha trialach a thos agus a stopadh. Cuirtear an comhartha aschuir i bhfeidhm ar thrasducht ir fuaime a dh anann teagmh il le cluas an fhosta , sa d igh go spreagtar an chluas at triail ag ton on de leibh al aitheanta 50 fuaimdh ine. Cuirtear comhartha trialach i bhfeidhm agus, de r ir mar a fhreagra onn an duine d ibh, meastar an caillteanas isteachta. B onn an tanaitheoir closmh adair calabraithe go beacht le haghaidh caillteanas isteachta 10 dB go dt +100 dB. Tomhaiseann na l amha n sc la closmh adair, mar sin, an C ag gach ceann de na minic ochta trialach. Taifeadtar toradh an C /dB do gach minic ocht 55 toin on, agus breactar na tortha do gach cluas ar ghraf darb ainm closghram. (a) Scr obh c pla focal, n abairt ghearr, leis na focail n na nathanna seo a leanas a mh ni , de r ir mar at siad n- s id sa sliocht. (i) moth istitheach (l nte 2 agus 3), ______________________________________________________ ____________________________________________________ [1] (ii) pl ascadh n icl ach (l nte 9 agus 10), ______________________________________________________ ______________________________________________________ ___________________________________________________ [2] A2Y2S6 2644.03 12 [Turn over (iii) go haonfhoirmeach thar thr imse ama (l ne 14), Scr daitheoir Amh in Marcanna Athmharc ______________________________________________________ ___________________________________________________ [2] (iv) bar lach (l ne 17), ______________________________________________________ ___________________________________________________ [1] (v) f or-fhrithchaiteach (l nte 22 agus 23), ______________________________________________________ ___________________________________________________ [1] (vi) norm (l nte 33, 35, 37, 40), ______________________________________________________ ___________________________________________________ [1] (vii) spreagadh (l ne 37), ______________________________________________________ ___________________________________________________ [1] (viii) trasducht ir fuaime (l nte 47 agus 48), ______________________________________________________ ___________________________________________________ [1] (ix) calabraithe (l ne 52). ______________________________________________________ ______________________________________________________ ___________________________________________________ [2] A2Y2S6 2644.03 13 [Tiontaigh an leathanach (b) D irigh mais mh r de charraig in airde san aer mar gheall ar bhr chtadh Krakatoa (l nte 10 12). Is a tharla i nd ir re n gur bogadh maisl r na carraige go dt pointe leath bealaigh idir leibh al na tal n agus uas-airde an scamaill deannaigh. (i) Scr daitheoir Amh in Marcanna Athmharc Is tuiscint chiallmhar facht ir de leathchuid amh in a ghlacadh nuair a bh onn an fuinneamh a bh i gceist leis an charraig a th g il r omh. M nigh cad chuige. M ni : _____________________________________________________ __________________________________________________ [1] (ii) Glactar leis gurb 9.3 103 kg m 3 me ndl s na carraige. R omh an fuinneamh a bh onn de dh th leis an charraig a ard in airde san aer. Fuinneamh = _________ J [3] (iii) Do fhreagra in (b)(ii), glactar leis gurb sin an fuinneamh ioml n a scaoileadh sa bhr chtadh. Agus an t-eolas i l nte 14 16 in s id agat, d an garmheastach n ar an fhuaimfhuinneamh a asta odh. Scr obh do fhreagra ceart go dt l on cu de fhigi ir bun sacha. Fuaimfhuinneamh = _________ J [3] (iv) R omh cumhacht na fuaime a rada odh n phoncfhoinse bhar lach ag l r an bhr chta (l nte 14 18). Cumhacht fuaime = _________ W A2Y2S6 2644.03 [2] 14 [Turn over (v) Ar F or 6.1 sceitse il graf lena thaispe int cad mar a bh onn fuaimdh ine I ag athr leis an fhad d l r an bhr chta (l nte 18 20). Scr daitheoir Amh in Marcanna Athmharc [2] F or 6.1 (vi) Agus Cothrom id 6.1 (l ne 20) in s id agat, r omh an fhuaimdh ine ag pointe at 4.5 km l r an bhr chta. Fuaimdh ine = _________ W m 2 [2] (vii)Uaidh sin faigh leibh al na fuaimdh ine ag an phointe at 4.5 km l r an bhr chta. (Glactar leis gurb 1.0 10 12 W m 2 an d ine tagarta I0 .) Leibh al d ine = _________ dB A2Y2S6 2644.03 [2] 15 [Tiontaigh an leathanach (viii) Agus Cothrom id 6.1 in s id, glactar leis go bhfuil an talamh thart ar an fhoinse f or-fhrithchaiteach (l nte 22 agus 23). Ag an cheann eile den sc al, d fh adfadh an talamh bheith f orions iteach. M nigh an difear a bh onn i do fhreagra ar (b)(vi) mar gheall air seo. Scr daitheoir Amh in Marcanna Athmharc ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ____________________________________________________ [2] (ix) An t-ions ch n in (b)(viii), r omh an difear a bheadh ann ar leibh al na fuaimdh ine in (b)(vii) mar gheall air. Difear ar leibh al na d ine = __________dB [2] (c) Baineann Rial ch in Sl inte agus S bh ilteachta ar Obair le guaiseanna fuaime in ionaid fosta ochta (l nte 25 27). (i) Luaigh dh shampla d ionaid fosta ochta a bhfuil guais fuaime iontu. 1. ____________________________________________________ ______________________________________________________ 2. ____________________________________________________ ____________________________________________________ [1] (ii) C n r amhch ram amh in a d fh adfadh fosta a dh anamh in adan na guaise fuaime? ____________________________________________________ [1] A2Y2S6 2644.03 16 [Turn over (d) s ideann an closmh adar sraith de thoin trialach ag minic ochta irithe. I seicheamh is iad seo (l nte 43 44): 125 Hz 250 Hz 500 Hz 1000 Hz Scr daitheoir Amh in Marcanna Athmharc 2000 Hz . . . (i) Seachas 12 000 Hz, an mhinic ocht is airde, t coibhneas irithe ag na minic ochta eile lena ch ile. Cad an coibhneas seo? ____________________________________________________ [1] (ii) Is an tsraith seo ina bhfuil coibhneas ag na minic ochta lena ch ile a roghna tear don triail closmh adair. Cad chuige, dar leat? ______________________________________________________ ______________________________________________________ ____________________________________________________ [2] (iii) Cad chuige a dtosa onn an tsraith ag 125 Hz seachas ag 15.6 Hz? ____________________________________________________ [1] (Leanann na ceisteanna ar an ch ad leathanach eile) A2Y2S6 2644.03 17 [Tiontaigh an leathanach (e) Is mar 32 dB i gcoibhneas le 1.0 10 12 W m 2 (l nte 31 33) a shainmh n tear leibh al fhuaimdh ine an noirm ag 125 Hz. Scr daitheoir Amh in Marcanna Athmharc (i) R omh fuaimdh ine an noirm ag 125 Hz. D ine an noirm = _________ W m 2 [2] (ii) Fosta a raibh an triail closmh adair dh anamh aige, chl raigh s luach C de 50 dB ag 125 Hz. R omh an os-fhuaimdh ine a thiocfadh leis a chluinstin ag an mhinic ocht seo. D ine = _________ W m 2 [2] (iii) Chl raigh fosta eile luach C de 5 dB ag 1000 Hz. M nigh, i bhfocail, cad a chialla onn an r iteas seo. D an tr cht ar ch il ocht isteachta an duine seo ag 1000 Hz. ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ____________________________________________________ [2] Caighde n na cumars ide scr ofa [2] SEO DEIREADH AN SCR DPH IP IR A2Y2S6 2644.03 18 [Turn over

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Additional Info : Gce Physics June 2006 Assessment Unit A2 2, Module 5: Electromagnetism and Nuclear Physics (Irish Medium)
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