8/8/2019 AISSCE Physics 2010 QP Set2

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-E

(iu) *qrdzr # sqql'rq1aUqn Td d t(u) qdi qrE?q6ai erq ffifud 'rlfu ffi * qtn w sqql,r*r sa-A* ' ."

c=3x108-r-1h = 6.626 x 10- 3aJse = !'602 x 10-1eCVo=4n x 10-7TmA-1

1 =gx1o9N^2c-24neo{aEiq si +idR me = 9.1 x 10-31kg{c.i{ 61 {Efr ffi,, a I.G7Sx 10-27kgd{sqn t{'q-disk = 1.381x 10-23 K- l3rffi q1 {i@T NA = 6.022 x 1023mol-ly9Elq1 FqJ = 6400 km

1. Find the ratio of energies of photons produced due to transition of an) electron of hydrogen atom from its '9+ L; , o 'T" . , " " - ," -- ' . , ,*- ;- , r , lz- ? to. l - I^,n-\.' (i ) secondpermitted energy level to the first level, and ti i i, n>-.' { (ii) the highest permitted energy level to the first permitted level. 1

ErEA-qq {qrg t trffii ffr t qmq'r t rer* sHri *1 u.-qisii61 3rgqrd rddfuq, Eq {imqrr(i) Wrr 3T-qqd-qf K{ t q-{AK{ q{ A, 3i{(ii) q-d-.qpT$T s-qi R{ t ,r-{A3Tgn R{ rR A r

2. A converging ens is kept coaxially in contact with a diverging lens -both the lenses being of equal focal lengths. What-is the focal length ofthe combination 2 L I t -I .N".O -) 1q-*errrrcrts *i qs3*qTtG-* -h;h-* ff il t -- ffi q1qt*r$qfr qqrq | {s {i+n{ q1 q}-sqEfrfrtrfr A'fr ?3. Name the physical quantity whose S.I. unit is J C-1. Is it a scalar or avector quantity ? E. f.,". -'"n ?-l - L 1sq ,ifrs nftr +r nTqrrfuq r'c*r qq.sTfi.S.I.)q:N-s C-l e r zrO rftqrrRrt qr qRqT? s' so-{,vL *55t2 3 P.T.O.

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4. A beam of electrons projecteda magnetic field along themagnetic field ?along + x-axis, experiencesa force due to+ y-axis. What is the direction of the

+ x-3THgs qEr,\ ^ ^ \_y+.\s 3tK{r nRrq {dcsFrt s+ y-3TQr er3f

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L2. A rectangular loop and a circular loop are moving out of a uniformmagnetic field to a field-free region with a constant velocity 'u ' asshown in the figure. Explain in which loop do you expect the inducedemf to be constant during the passage out of the freld region. Themagneti'c ield is normal to the loops.XXXXXXXX

x x x "_*B

X --)B

6

XXX

qs 3T.rdrrFRir q+ gf,rsl{ ffi (qq), ffi qoeqrq gq-dq +d t, *z n-CIqt{r fr, !,s RsR 'r 'u' t .Tfr6.{ G t, +0 ftH fr

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I t : , , l i,r l!( j. r14. Write Einstein's photoelectric equation. State clearly the three salientfeatures observed n photoelectriceffect, which can be explained on thebasis of the above equation.3TrErfl ]rs'rqT-f{gE+s.ruT 1frFEq I qsrqT-FgqqrE l td rq F{ fr{ ffieqr"il+1s-sn fmnsq t-{+1qv vfi-+.roiERrqr-zTT1qr vqnl t t15. Deduce the expression for the magnetic dipole moment of an electron

orbiting around the central nucleus.ffiq -ilFffi q't qRnqT G ge ffir @Tq + gq-dq ftgq eilWi * fcrqqsaism qfl{ (flq) qiFqq I

16. Draw a plot of potential energy of' a pair of nucleons as a function oftheir separation. Write two important conclusions which you can drawregarding the nature of nuclear forces. 2

ORDraw a plot of the binding energ"yper nucleon as a function of massnumber for a large number of nuclei, 2explain the constancy of binding energ"yper nucleon in the range30 < A < 170 using the property that nuclear force is short-ranged ?Ak$f-n t q-+ Tq q1 RqFdqs-qi 6r qd s{du 3-{+ Etq qi qfr * woq(riq{r{) * sq ii e-+qq | {s0 qTFr*tqq-dl q1 rfFd + qi q 3ilq i A q-ilT'fFffi{ t{qT q-*.} t, s+qr cd.o q1fuq t

SISrqtnf\qi ql !$ Til( {cqT z < A < 240 + fdq qR qffi$f4 "itrq o-qt il gd3Trfr,r++t qqqn {rqT t s-f,{ + Fq ii q{r{q r qrFrfrtqE-di + eg-qrrq *{pT (HqtToT)T sq+q, 3{rrr30 < A < 1?0 * qRqr i, nfd qfffi$fq aien s-qfq1fr{Rdr 1 qrcqrs{A + ftTq+tfrqti ?

17. Write two factors justifying the need of modu lating a signal.A carrier wave of peak voltage 12 V is used to transmit a messagesignal. What should be the peak voltage of the modulating signal inorder to have a modulation index of 75Vo?fu.rqqii qi \sfdf, q-rt q1 silcwqctrdr T 3ifufl q-drt t Fdq A 6nur frfuq IL2 v frrc{ dcam q1 qrc* ,rc'rqTwq}T qs {trT R-Gr+ }qrT+ ftq fsqTTqI t I qqffi {q-sts 757,di t fdq qigo$ Rlrf, 61 ftrr qt"cdl ffif E)frqrFq ?

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18. (i ) Identify the logic gates marked P and Q in the given logic circuit.

for theinputsA=0, B=0 andQ 3ifu-ir -+ l{i (c'ffu{ dl qi qiqn

A

( i i ) f t t$A=0, B=0 Bn{ A=1, B=1+fdqatr{f r I tdf t leqr19 . A network of four capacitors each of 15 pF capacitance is connected toa 500 V supply as shown in the figure. Determine (a) equivalent

capacitance of the network and (b) charge on each capacitor.

output at XqFsq r p eir

c2JL-"1

T1+lJ/ |

;--,1c1

tr+t (qrd)+) soov * q* frg( +it-d fr-{ frI qR n-&s qTfu q1 tT|.Rdrb pF t, fr ffi dfqq(b) q-&s {FrTfuq{ 3Td{r r

(ii)( i)

WriteA= 1,iqq 'tq+1Rq t

down theB=1.n-* erm-+l

C^

qR {irTftii * q-*sEqR q]-.sTTqTB*1 ge tnkdr nqrRtotq 'R, , :,-.----+t a ) icqch

c2c1

l--__ It tuInl IrV ------+6

55 2

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20. Write any two factors on which internal resistance of a cell depends.The reading on a high resistance voltmeter, when a cell is connectedacross t, is 2.0 V. When the terminals of the cell are also connected oa resistanceof 3 O as shown in the circuit, the voltmeter reading dropsto 1.5 V. Find the internal resistance of the cell.

f i . ,= 'JSZ - Kt0 d 6R-6 ufuq fiilq q{ ffi tf, 61 3Tr;dtr{qftfiq fr'{r +rar iqftTtq qMe{ +} ffi tn t qH q{ r;s-fl qr{qis 2'0 v t Izffi-deii 1q* Bo t qfrTtq S A9 Rqr qdr t dqr qRqqn EefqlqH-cr qT ttT-{qi6 .q Ets{ 1'5 v e} qni t I tf, 51 qqft6dftq r

I qd gE:i_) \_qq Hc l chtrqr , frqfrTtq{rfr

.K,=JSE K2I. Which mode of propagation is used by short wave broadcast serviceshaving frequency range from a few MHz upto 30 MHz ? Explaindiagrammatically how long distance communication can be achievedbythis mode.Why is there an upper limit to frequency of waves used n thismode?

gE MHz t gOMHz ffi 3ir{fr qfr+t d, eg-nu xvquT+pii t ftrq, fsq{qruT frfrT6r Bqfrq i*qr qrar d ? erRs *1 voqtr i ws eiifqqffi qq'Ftqt gg qR frq ;1+.r-{TqTddr t | {s FfET lqqR i, di-ii 4t 3Tr{frq1 qswR qtqT ii ET-fr ?

3

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In Young's double slit experiment, the two slits 0.12 mm apart areilluminated by monochromatic light of wavelength 420 nm. The screenis 1.0 m away from the slits.(a)

(b)

Find the distance of the second (i) brightfrom the central maximum.How will the fringe pattern change if thefrom the slits ?

fringe, (ii) dark fringe

screen is moved awav

?ir * R-Fir r+q fi, +ir Fffi + mq "i Rt 0.12mmt srt {e +20 ,-ii"ed t q-d-q"trcnrvr {R fuqrTqrt I w{ FFd t 1.0m (t t I(a) iF{q s..qs t (i) W.frfrR fu-q, (ii) Wfr sr{-d BF-q*i Efrm

qifqq I(b) qR qt q1 fflR* n {r fu's{TFq qrq, d ffif } ted fr er qFs-fr{

Eltn ?State Kirchhoff's rules. Apply Kirchhoff's rules to the loops ACBPAand ACBQA to write the expressions or the currents I, , ro and I,. inthe network.

Er=6v

aE2=

R=12Q

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24. (i )( i i ;

@s t Fffiq frfuq r ffiq * FTqrit r qdi ACBPAefl{ ACgQAq{ sq+'r6G, H fr fqg-( qrneii y 12 I, + rfl aiqq frfuq r

Er=6v

Draw a neat labelled ray diagram of an astronomical telescope nnormal adjustment. Explain briefly its working.An astronomical telescope uses two lenses of powers 10 D and1 D. What is its magnifying power in normal adjustment ?

ORDraw a neat labelled ray diagram of a compound microscope.Explain briefly its working.Why must both the objective and the eye-piece of a compoundmicroscopehave short focal lengths ?qFnrT wr+qq ii qs u:ffiq $ql,fs sT g-@ qlqiB'd kI{ 3rtsq-{r{q I qq-+1qr-4fqltT61 ri*q ii ss dfqq Iq-+e.'ild=q {Eqis + A ffi fi rTfu 10D sir r o t r HTqFqqTqlq-qi gq-+i3rTEdqffifrr lr e ?

sIef,Etq-s qg-s qel-fitr qr s@ q-qiho fu{uT3ilt{q q-4r{q r gs-+1qTdhftl +1{Qq t Hs qiFq I{i5s {qqqrtr t fr-.ii ffi - 3TFr-$q-slrT tFdni - qii q}sq Efr +q uv}Afr qrffl ?

( i )(i i )(i)

(i i )

( i)( i)

aR=12f)

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25. How does an unpolarised Iight get polarised when passed through apolaroid ?Two polaroids are set in crossed positions. A third polaroid is placedbetween the two making an angle 0 with the pass axis of the firstpolaroid. write the expression for the intensity of light transmittedfrom the second polaroid. In what orientations witl the transmittedintensity be (i) minimum utt4 (ii) maximum ?ffi qA{{s t fr*{ q; t 3{gF{d fiRr qT TquTn t} qrar t ?a aafrg qifud arqreT t | fl+ +q fr q6 frq'{ trd-{es qu ntFRsT qklTt ft .rr q.d-a atr.{s 1qrF{dGT e dvr e-{KI Wt ma{T{s qnrfr'dn6Rr 41 trdfrT+ frq -ditrs fdFsq I ft-q elFrFq-qTHr qRrlfu-dfiRr q)t frdffi(i) q{-dq eir till 3Tfir-6-dqrfr ?

26. (a)(b)

Write symbolically he B- decayprocessof lie 'Derive an expression or the average ife of a racionuclide'Giveits relationshipwith the half-life'

(a) i?" * p- trq Tnqq} rfr+rcqo5q ii frtuq I(b) ffi \ffiekq qffir{s q1 3iqd 3il9 t fdq ai$s -o5iln (vlR)

dfqq I {sil erd-e+q aiq frfuq t

27. The image obtained with a convex lens is erect and its lengthtimes the length of the object. If the focal length of the lens iscalculate the object and image distances'ffi s-r-o iiq dRr Nw qfrRq Sqr 31t{eq +1 qTi 4I

qR X-4T Iqi qt-sqES Zo .- E), ni +q d{ qftTRq4i $A 61 qft5qraqfifqq

is four20 cm,qR AqI

125512

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28. State Faraday's law of electromagnetic inductionFigure shows a rectangular conductor PQRS in which the conductorPQ is free to move in a uniform magnetic field B perpendicular tothe plane of the paper. The field extends from x = 0 to x = b and iszero for x > b. Assume that only the arm PQ possesses esistance r.When the arm PQ is pulled outward from x = 0 to x = 2b and isthen moved backward to x = 0 with constant speed n, obtain theexpressions for the flux and the induced emf. Sketch the variations ofthese quantities with distance 0 < x < 2b.

aaaaaaaaaoaaaaaaaa

aaalx=b

ORDraw a schematic diagram of a step-up transformer. Explain itsworking principle. Deduce the expression or the secondary o primaryvoltage in terms of the number of turns in the two coils. In anideal transforrner, how is thjs ratio related to the currents in the twocoils ?How is the trans former used in large scale transmission anddistribution of electrical energy over long distances ?

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Paaa

aa0

aa aao aaa aoa a

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txr} or frgd grd-+lqr"r qr F1qq s dfrq rf

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(a) Draw the circuit arrangement for studyingoutput characteristics of an n-p_n transistor inWith the help of these characteristics define (i )(ii) current amplification factor.Describe briefly with the herp of a circuit diagram how an n-p_ntransistor is used to produce self-sustainedoscillations.p-n fq gt+s qr qRqqerrto til ei-lRRrq rzre$ilr 1i1;qqqftffiqfiq I {t qfu?r]61 3q+rrRfu-s{ BT+s* v - r erFmqTffi ** fdq +fr frqr qrdrA ? qq xsrfry _ r eFrcmnFrs 4r{qIIZFM3rq-$-srds (LED)RT t ? s-erqfq trg-( q-di ei gc++ t q--d{.f ercil6r 3-d +1pqq

3ISTilt3qqfrs-sffi6 (CE) E-qrs n !:s n-p-n FiFsi + fr+qTsil{ f{rid3TfiRTqrFmerur+r+ frq qRqqqroTr 6r errts EiT{qr g+s+FrflrqTffi+1vorcrar fil FrlqTqfdtq eilr (ii) qRrTqet{Tfs +1qRq*r frBq r{* qfuq 3ilts dr sdr{arn Tdq fr q"h +irqq fu !F n_p_n ifuer +rsqzltq,++a;qffid *erq riq-dsit t rdq fsq r*n tlnr d r

with the help of a diagram, explain the principle and working ofa moving coil galvanometer.what is the importance of a radial magnetic field and how is itproduced ?why is it that while using a moving coil galvanometer as avoltmeter a high resistance in series is required whereas in anammeter a shunt is used ?

ORDerive an expression for the force between two long parallelcurrent carrying conductors.Use this expression o define S.I. unit of current.

(b)

(a)

(a)

(b)

the input andCE configuration.input resistance,

Erqisr3Ttzgq

{ lnnb)

30. (a). (b)

(c)

(a)

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-(c) A long straight wire AB carries a current I. A proton P travels

with a speed v, parallel to the wire, at a distance d from it in adirection opposite to the current as shown in the frgure. What isthe force experiencedby the proton and what is its direction ?

Pd-O PROTONIIJvq+ srtu qi v6".rar qo S.m ffi4z1 t R-q;f, 3iT oTdBftI+l ws.-aG* ,chl l \r l e Ifiq g'q-dtq l q-rF{Tq'{ t 3r\ rfr mq !"5RTilrr t*qr qrart ?qf, l{g-f,i ffi4 ql qffiz1 +1qffd3Iq}'TqTi t fdq }"fr-mqr q-*g-q hRleTeit o'nqr rrs-dl q-EfsWcr fr qo qiz 6r sqqlTEldr ?

ETEETTA dd qqnn frg( $IlqrqrfriTdi * q1q f, t toq qd aiq-s Eil-d dfrq t*ts aiq-s 6r sqfrrr kUq qru * qq.qd. (S.L) qr6 a1 qR'gilft"f,G +ftq fifqq Iq-scd frt nn AB t sTKrlqr|{f, E} t r F-i i fquq r1q3i-{qT{ q qfiqP,dR * qqrm, trq( qK s1R{rT41 ffi-d Rvr ii, dR t a (fr qr, v qrf, i'rfr qcart rqlzTa { dG Erf,r tT ts-d{I 3il ss-+1Rfl flr t ?

Pd ---+O lHqIITV

(a)(b)(c)

(a)(b)

(c.)

165 2