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1. Fora p-type Semiconductor., , Ww, following statements is true ? :, (a) Holes are the Majori i, , atoms are the operas.” on og —, (b) Holes are the major i, aloms are the dopants aan teal rae, (c) Electrons are the majorit i, pentavalent atoms are the ome _, (d) Electrons are the maioy) Carriers and trivalent, atoms are the dopants., , ich of the, , 2. A body weighs 200 N on the surface of the, earth. How much will jt weigh half way, down to the centre of the earth ?, , (a)200N (6) 250N (c) 100N (0) 150N, , 3, In which of the following Processes, heat is, neither absorbed nor released by a system?, (a) Adiabatic (b) Isobaric, (c) lsochoric (d) Isothermal, , 4. Six similar bulbs are connected as shown in, the figure with a DC source of emf E and zero, internal resistance., , The ratio of power consumption by the bulbs, when (i) all are glowing and (ii) in the, situation when two from section A and one, from section B are glowing, will be, , —_———_—, A 8, , u, , , , te, , E 9, fyo:4 te et, , -_——~— -— w, , 5. A small hole of area of cross-section 2 mm? is, Present near the bottom of a fully filled open, tank of height 2 m., , Taking g = 10 m/s', the rate of flow of water, , through the open hole would be nearly, (@) 89 x 10%ms, , (b)2.23 «10% m/s, (c) 64 x 10° ms, (d) 12.6 x 10° m5, , 6. A force F = 204 10y acts on a particle in, , y-direction, where F is in newton and yin, meter,, , Work done by this force to move the particle, from y =0 to y=1m is, , (aj SJ {b) 25 J, , (c) 20 J (a) 30.3, , 7. Two point charges A and B, having charges, +Qand —Q respectively, are placed at certain, distance apart and force acting between them, is F,, , If 25% charge of A is transferred to B, then, force between the charges becomes, , oF 16°, — i) -—, , (a) 16 (b) 9, , wo * (a) F, 3, , 8. When an object is shot from the bottom of a, long smooth inclined plane kept at an angle, 60° with horizontal, it can travel a distance »,, along the plane. But when the inclination is, decreased to 30° and the same object is shot, with the same velocity, it can travel x, distance., Then x, sx, will be, (a) V2.1 (b) 1: v3, (c) 1:2 V3 (d) 1: v2

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14. Two par, , 9. Pick the wrong answer in the context with, , rainbow., , (a) The order of colours is reversed in the secondary, rainbow, , {b) An observer can see a rainbow when his front is, towards the sun, , (c} Rainbow is a combined effect of dispersion, refraction and reflection of sunlight “pe, , (a) When a light rays undergo two intemal, reflections in a water drop, a seconda i, i ry rainbow, , 10., , Average velocity of a particle executing SHM, in one complete vibration is, , 2, Ao (AZ zero ah &, , 11. The total energy of an electron in an atom in, an orbit is —3.4 eV,, , Its kinetic and potential energies are,, respectively:, , (a) -3.4 eV, -6.8 eV, (c) 3.4 eV,3.4 eV, , (b) 3.4 eV, -6.8 eV, (d) -3.4 eV, -3.4 eV, , 12, Ata point A on the earth’s surface the angle, of dip, 6 = +25°,, Ata point B on the carth’s surface the angle, of dip, 6 = -25°., We can interpret that, (@) Ais located in the southern hemisphere and Bis, *— Jocated in the northern hemisphere, (b) Ais located in the northern hemisphere anc Bis, located in the southern hemisphere., (c) A and B are both located in the southern, hemisphere., ({d) A and B are both located in the northern, hemisphere., , 13. In which of the following devices, the eddy, current effect is not used?, , (a) Magnetic braking in train, , (b) Electrornagnet, , (c) Electric heater, , (d) Induction furnace, , ticles A and B are moving in uniform, circular motion in concentric circles of radii r,, and », with speed Vv, and Ya respectively., Their time period of rotation is the same. The, ratio of angular speed of A to that of B will be, , (0) 4, ha Oat, ic) 1:, , 15., , 16,, , 17., , 18., , 79., , Two similar thin equi-convex lenses, of for:, length f each, are kept co-axially in Cintas :, with cach other such that the focal length «, the combination is F. ne, When the space between the two lenses is, filled with glycerine (which has the same, refractive index (1 = 1.5) as that of glass) then, the equivalent focal length is F,., , The ratio F : F, will be, , (a)1:2 (2:3, , An electron is accelerated through a potential, difference of 10,000 V., , Its de-Broglie wavelength is, (nearly) :, , (m, =9 x10" kg), (a) 122 x 10°""m, (c) 122mm, , (3:4 (2:1, , (b) 122 x 10m, (d) 122 x 10m, , ++6V, , 3, 0 3A, LED, Al ”), a, 0, Bi, , The correct Boolean operation represented by, the circuit diagram drawn is, , (a) OR ib) NAND [c)NOR (AND, , A soap bubble, having radius of 1 mm, is, blown from a detergent solution having a, surface tension of 25 x 107 N/m., , The pressure inside the bubble equals al a, point Z,below the free surface of water ina, container,, , Taking g = 10 m/s’, density of water, =10'kg/m’, the value of Z, is, , {b) 1. om, , (a) 100 cm, , (a) 10. cm, (c} 05cm., The displacement of a particle executing, simple harmonic motion is given by, , y= A,+ Asinw! + Boosey, , Then the amplitude of its oscillation is given, by, , (a) VA’ + BF, (co) A+8, , (b) (AIA +BY, (a+ varrk

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20. The work done to raise a, , . The speed of a swimmer in, , Mass my, surface of the earth to a height h — e, Which is, , equal to the radius of the earth “A, , 1, 2 ~ 3, (aj2mgR (by amor () TOR (d) mgr, , still water i, 20 m/s. The speed of river water is oon d, is flowing due east. If he ag, , : is standing on th, south bank and wishes to cross i e, , along the shortest path the angl, , gle at whi, should make his strokes w.r.t, north co _, given by, , (a) 0°, (c) 45° west, , (b) 60° west, (¢) 30° west, , . Two parallel infinite line charges with linear, , charge densities +2 C/m and -} Cm are, , .placed at a distance of 2R in free space., , What is the electric field mid-way between, the two line charges?, , 2a a, (a) at NIC (b) at Nic, a, (c) —— NIC (d) Zero, 2ne,R, , 23. Which of the following acts as a circuit, , 24., , 25,, , protection device?, , ctor {(b) Switch, a ne (d) Conductor, A parallel plate capacitor of capacitance 20pF, , is being charged by a voltage oe, potential is changing at the rate Y ., The conduction current Te —_, connecting wires and the disp “= mn, current through the plates of the ¢a, , would be, respectively., , (a) GOA, 60 pA c ek, , (c) zero, zero, pended bya, , ass M is sus! of the wite, , When a block of Mt 1, the lengt, , long wire of length, becomes (L +!), The elastic potential, extended wire is, , (a) Mgt, 1, —MgL, (c) 3 Mg!, , energy stored in the, , 1g!, (b) 3, (a) Ma!, , Tce \eyeeauaraiy curved Kaper ZULY 3, , 26. A hollow metal sphere of radius R is, uniformly charged., The electric field due to the sphere at a, distance r from the centre, , (a) Zero as / increases for r< R, decreases as r, increases forr > R, , tb) zero as 6 increases for r<A, increases as +, increases forr > R, , {c) decreases as r increases for r < A and forr > R, {G) increases as r increases fer r < A and forr > R, , 27. A mass i is attached to a thin wire and, whirled in a vertical circle., The wire is most likely to break when:, {a) the wire is horizontal, (b) the mass is al the lowest point, {c) inclined at an angie of 60° from vertical, (d) the mass is at the highest point, , 28. Which colour of the light has the longest, , wavelength?, (a) Blue (b) Green, (c) Violet (d) Red, , 29. A particle moving with velocity v is acted by, three forces shown by the vector triangle PQR., The velocity of the particle will, , p, R Q, , {a} decrease, , (b) remain constant, , (c} change according to tne smailest force OR, , (d) increase, 30. lonised hydrogen atoms and o -particles with, same momenta enters perpendicular to a, , constant magnetic field, B., The ratio of their radii of their paths ty +f, , will be, (a) 1:2 (o) 4:4, (ce) 1:4 (d) 2:1, , 31. The unit of thermal conductivity is :, (a) Jm' K" {b) Wm K(c) Wm" K* (d) JmK

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32. A coil of 800 turns effective area 0.05 m: is (0) ft) = deoe{ ™ } warown yin ee, kept perpendicular to a magnetic field 2), , , , 510° T, When the plane of the coil is (d) Yt) = ~Scos2at, whore yin im, 90° Alita ‘, aaa — . any of its co-planar axis 37. In total internal reflection when the angle of, 1s, the emf induced in the coil will be incidence is equal to the critical angle for ty, iesy (b)2 x 10° V pair of media in contact, what will be angle, M (dj2v of refraction?, 33. A disc of radius 2 m and mass 100 ke (a) 0°, a ss rolls on, a horizontal floor. Its centre of ae tas (b) Equal to angie of incidence, speed of 20 cm/s, How much work is needed 2 a, to stop it? a, (a) 30 kJ (b) 2 38, A solid cylinder of mass 2 kg and radius 4 ey,, (c)1J (d) 3u is rotating about its axis at the rate of 3 tpn, . rhe e required Lo stop alter 2s, 34, In an experiment, the percentage of error posited ., occurred in the measurement of physical J nN, de {a)2 x 10" N-m {b) 12 % 10° Nem, quantities A, B,C and Dare 1%, 2%, 3% and (c)2 = 10° Nm {d)2 x10 ° Nm, 4% respectively. Then the maximum, percentage of error in the measurement X, 39. A block of mass 10 kg is in contact against the, A’p? inner wall of a hollow cylindrical dram of, where, X = cp will be radius 1 m. The coefficient of friction between *, , the block and the inner wall of the cylinder is, , , , " fa, (a) 16% (b) 10% — (c) 10% is5 0.1. The minimum angular velocity needed for, the cylinder to keep the block stationary when, 35. Body A of mass 4: moving with speed 1 the cylinder is vertical and rotating about its, collides with another body 8 of mass 2m, at axis, will be (g = 10 m/s? ), rest. The collision is head on and elastic in 10, oS 1, nature. After the collision the fraction of (a) 2 _ hy 10. rece, energy lost by the colliding body A is (c) On rad/s (d) V10 rad/s, 8 4 5 1, (a) 9 (b) 3 (c) 9 (9) 9 40. A cylindrical conductor of radius & is carrying, a@ constant current. The plot of the magnitude, 36. The radius of circle, the period of revolution, of the magnetic field B with the distance d, initial position and sense of revolution are from the centre of the conductor, is correctly, indicated in the below fig. represented by the figure, B B, (a) L \ {b}, R, oom a B) B, y-projection of the radius vector of rotating |, | ’ ad =, particle P is /, ca) yt) = Asie] whore yin m (c) / (a) |, F :, A @ —R a, , (b) A= 2004 3 pee

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4. In the circuits shown, ly, , clow, the readings, voltmeters and the ammeters will be ngs of, , 109 4, , ], , , , M4, , 10¥, 169, , |, —____, , 10V ., , , , fa) , = V, andi, >/,, {b) Y, = V, ands, =i,, () > V andi, >/,, (dV, > Mandi, =f,, , 43, , 45, , “Ta ereerumraty doived Paper 2019 5, , 42. lncrease in temperature of a gas filled in a, , container would lead to, , {a) increase in its kinatic energy, , (b) decrease in ts pressure, , (c) decrease in inlermalecular distance, (d} Increase in its mass, , A copper rod of 88 cm and an aluminium rod, of unknown length have their increase in, length independent of increase in, temperature. The length of aluminium rod is, (2) 113.9 cm (b) 88cm — (c) GBem (3) 68cm, , 44. o-particle consists of, , (a) 2 electrons, 2 protons and 2 neutrons, {e) 2 electrons and 4 protons only, , {c) 2 crotons anly, , (d) 2 protons and 2 neutrons only, , In a double slit experiment, when light of, wavelength 400 nm was used, the angular, width of the first minima formed on a screen, placed 1 m away, was found to be 0.2”. What, will be the angular width of the first minima,, if the entire experimental — is, immersed in water? (y,..., = 4/3), , (ayO.15° )O.OSI }O1" — (G} 0.286"