BLUE PRINT FOR MODEL QUESTION PAPER 3

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1 Uit Chapter Number Number of teachig Hours Weightage of marks Mark Marks Marks 5 Marks (Theory) 5 Marks (Numerical Problem) BLUE PNT FO MODEL QUESTON PAPE Class : PUC Subject : PHYSCS () CHAPTES Electric Charges Ad Fields 9 8 Electrostatic Potetial Ad Capacitace 9 8 Curret Electricity 5 4 Movig Charges Ad Magetism Magetism Ad Matter 8 Electromagetic ductio 7 7 Alteratig Curret Electromagetic Waves 9 ay optics ad optical istrumet Wave Optics 9 8 Dual Nature Of adiatio Ad Matter 5 Atoms 5 5 Nuclei 7 4 Semicoductor Electroics 5 Commuicatio System 4 Total Number of Questios TOTAL MAKS

2 MODEL QUESTON PAPE P.U.C. PHYSCS () Time: hours 5 mi. Max. Marks: 70 Geeral istructios: a) All parts are compulsory. b) Aswers without relevat diagram/ figure/circuit wherever ecessary will ot carry ay marks. c) Direct aswers to the Numerical problems without detailed solutios will ot carry ay marks. PAT A Aswer the followig 0 x = 0. What is electric dipole.. State Ampers circuital law.. Metio ay oe use of electromaget. 4. Name the law which gives polarity of iduced emf. 5. Give the wavelegth rage of -rays.. Metio the expressio for displacemet curret. 7. How does the power of a les vary with its focal legth? 8. Who proposed wave theory of light? 9. Write the S uit of activity. 0. Draw the circuit symbol of p trasistor. PAT B. Aswer ay FE of the followig questios 5 = 0. Write ay two properties of electric field lies.. Metio a expressio for force o charge movig i uiform magetic field ad explai the terms.. Defie the terms retetivity ad coercivity. 4. What are eddy currets? Give oe use of eddy currets. 5. What is a thi prism? Write its deviatio expressio.. epreset the plae polarised light ad upolarised light diagrammatically. 7. Defie half-life of radioactive elemet ad metio expressio for it. 8. Write two differeces betwee itrisic ad extrisic semicoductors. PAT C. Aswer ay FE of the followig Questio 5 = 5 9. Derive a expressio for a electric potetial eergy of a system of two poit charges i the absece of electric field. 0. State ad explai Ohm s law ad hece defie ohm.

3 . Write ay three properties of ferromagetic materials.. Derive a expressio for motioal emf,iduced across the ed of a coductig rod movig i a uiform perpedicular magetic field. Metio ay three sources of eergy losses i trasformer. 4. Metio three properties of uclear forces. 5. Distiguish betwee coductors,isulators ad semicoductors o the basis of bad theory. Draw the block diagram of amplitude modulatio trasmitter. PAT D. Aswer ay TWO of the followig Questios 5 = 0 7. Obtai a expressio for electric field due to a ifiitely log straight uiformly charged wire usig Gauss law 8. Derive a expressio of effective resistace of two resistors coected i parallel 9. Derive a expressio for magetic field o the axis of circular wire carryig electric curret.. Aswer ay TWO of the followig Questios 5 = 0 0. Derive the expressio for the refractive idex of the material of the prism i terms of agle of prism A ad agle of miimum deviatio D. What is photoelectric effect? Usig Eistei s photoelectric equatio, explai three experimetal results.. Explai -p- trasistor as a amplifier i commo emitter mode.. Aswer ay THEE of the followig. 5 = 5. A 400 pf capacitor charged by a 00 d c supply is discoected from the supply ad coected to aother ucharged 400pF capacitor calculate the loss of eergy. 4. Three resistors Ω,Ω ad Ω are coected i series, what is the total resistor of the combiatio? if the combiatio is coected to a battery of emf ad egligible iteral resistace the obtai the potetial drop across each resistor. 5. A series L C circuit with = 0Ω,L =.5 H ad C = 5µF is coected to a variable frequecy of 00 AC supply whe the frequecy of the supply is equal to the atural frequecy of the circuit, what is the average power trasferred to the circuit i oe complete cycle.. Moochromatic light of wavelegth 5000 A o from a arrow slit is icidet o the double slit. f the separatio of 0 friges o the scree m away is cms. Fid the slit separatio. 7. Calculate the shortest ad logest wavelegth of Balmer series of hydroge atom. Give =.097 x0 7 /m.

4 SCHEME OF EALUATON: MODEL QUESTON PAPE Q. No ANSWES Marks. PAT A. Two equal ad opposite charges separated by small distace costitutes a electric dipole.. The lie itegral of magetic field aroud ay closed path i free space is equal to o times the et curret eclosed by that path.. Used i electric cells/loud speakers/telephoe (ANY ONE) 4. Lez s law 5. 0.A o to 00A o. Displacemet curret: id = ε o dφ dt E 7. versely 8. Huyge 9. Bequerel or dis/s 0. p PAT B.. Ay two. F = B q v si Explaatio of terms. Correct Defiitios each 4. j Meaig Ay oe use 5. t is a prism of small agle d = A(-). epresetatio(diagram) Polarized U-polarised 7. Defiitio Expressio 8. Two differeces each PAT C 9. q = 4πε o r q W = 4πε o r q This work doe is stored i the charges as potetial eergy ad is give by, q q PE = 4πε o r Where r is the distace betwee the charges 0. Statemet. Explaatio. Defiitio of ohm.

5 . Ay three properties each. Magetic flux eclosed by the loop is give by = = B l x From Faraday s law, magitude of iduced emf is give by, e = dφ >() dt dx Arrivig at e = B l v v dt. Ay three losses each 4. Ay three properties each 5. Coductio bad Coductio bad Coductio bad each Overlappig Small eergy gap Large eergy gap alece bad alece bad alece bad Coductors Semicoductors sulators Coductors. coductors,valece bad ad coductio bads are overlapped. or each. Semicoductors semicoductors, the valece bad ad coductio bads are separated by small eergy gap. sulators. isulators, the valece bad ad coductio bads are separated by large eergy gap Trasmittig atea Message sigal Amplitude modulator Carrier Power amplifier. 7. Figure PAT D Flux through curved surface = E area of curved surface = E r l -.()

6 From Gauss s theorem, Flux = q ---->() ε o O comparig ()ad (), we get 8. Figure p = + p ad E r l = E = π ε o λ l ε o λ r 9. Diagram o ( dl r) db = db 4 r o dl db 4 r Magetic field due to two elemets = db siq Arrivig at o db / 4 ( x ). 0. ay diagram si i si r Arrivig at d = (r +r -A) Graph or expatiatio of variatio of d with i (agle of icidece) Arrivig at fial expressio, A D si A si

7 . Meaig of photoelectric effect Equatio Three results each. Circuit diagarm put ad out wave forms Explaatio.. J 0 U U Loss i eergy, J 0 4 q U flows will the charge of same capacity capacitor of capacitor toucharged After coectig charged J 0 q C U f i f i q q 4., pdacross 4, pdacross, pdacross A r E Ω s s 5. W P A Z Z Z C C L Atresoace ) ( L

8 . m D d d D m m ad m ad x0.097 x0 shortest wavelegth, Tocalculate.5x0.097 x0 logest wavelegth Tocalculate