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|, For a p-type semiconductor, which of the, following statements is true ?, {a} Holes are the majority carrier, aloms are the dopants S$ and trivalent, , (b) Holes are {he majority carriers, atoms are the dopants. and pentavalent, , (c} Electrons are the majority carrier:, , pentavalent atoms are the pte ——, , (¢} Electrons are the majority carriers i, atoms are the dopants. eee, , 2. Abody weighs 200 N on the surface of the, earth. How much will it weigh half way, down to the centre of the carth ?, fa)200N (6) 250N (c) 100N, , 3. Inwhich of the following processes, heat is, neither absorbed nor released by a system?, , (a) Adiabatic (b) Isobaric, (c} lsochoric (d) tsothermal, , {d) 150N, , connected as shown in, , 4, Six similar bulbs are, ource of emf E and zero, , the figure with a DC s, internal resistance., , The ratio of power CO, when (i) all are glowing 4, situation when two from section A, from section B are glowing. will be, , eg, , nsumption by the bulbs, , nd (ii) in the, and one, , “i., , Fae ef?, , (aj9:4 (b) 1:2, , 5., , 6, , . When an, , A small hole of area of cross-section 2 mm’ is, present near the bottom of a fully filled open, tank of height 2m., , Taking g = 10 m/s’, the rate of flow of water, through the open hole would be nearly, , {a) 89 x 10°°m"/s, , {b) 2.23 x 10° m’/s, , {c) 64% 10% m/s, , (d) 12.6 x 10° m/s, , A force F =20 +10y acts on a particle in, y-direction, where F js in newton and yin, , meter., Work done by this force to move the particle, , from y =0 to y=Tmis, (a) 5J, (ce) 20, , 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 Ais transferred to B, then, , force between the charges becomes, OF 16F, , = (©) —, , 16 9, , (b) 25 5, {o) 304, , (a), ar, (c) 3 (a) F, object is shot from the bottom of a, Jong 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, itcan travel x, distance., Then x, 2x, will be, (a) V2.1, (123, , (o) 1: V3, (a) 1: v2

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9. Pick the wrong answer in the context with 15. Two similar thin equi-conve, ? ey, , rainbow. length f each, are kept co-axi, (a) The order of colours is reversed in the secondary with cach other such that the, rainbow ., , if a, the combination is F.. Gcal Tengah og, (b) An observer can see a rainbow when his front is : ‘, , lenses, of locy, ne a, ally in con, act, , When the space between the tw«, , towards the sun wil Saat 4 ‘ Lenses j, (c) Rainbow is a combined effect of dispersion = e ae glycerine (which has the sathe, refraction and reflection of sunlight refractive index (\= 15) as that of glass) 1, (d) When the light rays undergo two internal the equivalent focal length is F,, ”, reflections in a water drop, a secondary rainbow The ratio F, :F, will be, is formed (a) 1:2 (bo) 2:3 (c) 3:4 (2.4, 10. Average velocity of a particle executing SHM —- 16. An electron is accelerated through a poteny;, in one complete vibration is difference of 10,000 Y. ., Aw? Aw Its de-Broglic wavelength is, (nearly) ;, Al — —_ 8 (nearly) ;, {a)Aw (b) 5 (c) zero — (di) : (m, =9 x10" kg), 12, *, 11. The total energy of an electron in an atom in - pe _ ” a ced e an, an orbit is -3.4 eV. ="., Its kinetic and potential energies are, 17. :, respectively: 0 A, (a) -3.4 eV, -6.8 eV (b) 3.4 eV, -6.8 eV Al LED, (c) 3.4eV,3.4eV (d) 3.4 eV, -3.4 eV ”, R, 12. Ata point A on the earth’s surface the angle 0, of dip, & = +25° Bi, Ata point Bon the earth's surface the angle, of dip, d= -25°. The correct Boolean operation represented by, We can interpret that the circuit diagram drawn is, (a) Ais located in the southern hemisphere and Bis (a) OR (bo) NAND (c)NOR = (d) AND, * — Jocated in the northern hemisphere., (b) Ais located in the northern hemisphere and Bis 18, A soap bubble, having radius of | mm, is, located in the southern hemisphere. blown from a detergent solution having @, (c) é ee are both located in the southern surface tension of 25 x 10™ N/m., jemi: ere., (dé) A and 8 are bath located in the northern The pressure inside the bubble equals 3 *, hemisphere. point Z,below the free surface of water ina, a container., 13. In which - the following devices, the eddy Taking g =10 m/s’, density of water, current effect is not used? 3 ’ is, : =10’kg/m’, the value of Z, is, (a) Magnetic braking in train Bh 7, (b) Electrormagnet (a) 10cm (b) 1.em, (c) Electric heater (c) 0.5em - {d) 100 cm, (d) Induction furnace ‘ i, 19. The displacement of a particle executing, 14, Two particles 4 and B are moving in uniform simple harmonic motion is given bY, Ss oo concentric circles of radii r, y=A,+Asinot+ Boos! - :, and f With speed v, and v, respectivel its oscillation is s°, Their time —_ of rotation is the ae The a the amplitude of its oscilla, tio of angular speed of A to that of B wi 7 (qo aa tht OF, fav, ¥9 () fe i mll’be (ah VA' +B wo YA +A, (a) vs nr ()A+8 (a) Aaa +8, , (1:1

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Fe, , The work Gone to raise a mass from th, - e : ww c, surface of the carth to 2 height i, which is, 3] to the radius of the earth, is ee, mam OD =maR (Semon, , aD) mor, , The speed of a swimmer in stil} Water is, , 309 m/s. The speed of river water is 10 m/s and, js flowing due east. If he is Standing on the, south bank and wishes to cross the river ., along the shortest path the angle at w hich he, should make his strokes w-r.t. north is ., , given by, (2) - (D) 60° west, (c) 45° west (c) 30° west, , 22. Two parallel infinite line charges with linear, , charge densities +7. C’m and -2 Cm are, , placed at a distance of 2R in free space., , what is the electric field mid-way between, the two line charges?, , , , 22 d, ta) 2 NIC ) —*. NC, uf xefi, i ——Nc (a) Zero, 2nef, , 23. Which of the following acts as a circuit, , &, , 25,, , protection device?, fa) Inductor, (c) Fuse, , (b) Switch, (d) Conductor, , A parallel plate capacitor of capacitance 20pnF, , is being charged by a voltage source whose, potential is changing at the rate of 3 V/s., The conduction current through the, , i i isplacemen', connecting wires and the disp ;, current through the plates of the capacitor,, , would be, respectively. sii it, (a) CO pA, 60 WA (b) 60 pA,, {c) zero, zero (d) zero, 60 wr, , When a block of mass is suspend Oe, long wire of length L, the length o, , becomes (L + !)- “dk, The elastic potential energy stored in the, , extended wire is 1, (b) > Mal, , (a) MgL, tc) 3M muy, , 26. A hollow metal sphere, , SNe Pepe aE, , of radius & is, uniformly charged,, , The elecitic tield due to the sphere ata, distance r fram the centre, , (a) 2, , erO aS / increases for ¢< A, decreases as r, wrcreases tors, , >R, , increases for 6 < A, increases as /, increases torr > AR, , (c) Gecreases as ¢ increases for < Rand forr > R, , (@) increases as r increases for < Rand torr > R, , , , , , (oi, , 27. A mass ris attached toa thin wire and, , whirled in a vertical circle., , The wire is most likely to break when:, (a) the wire is horizontal, , {b) the mass ts at the lowest point, , {c} inclined at an angle of 60° irom 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 (a) Red, , 29. A particle moving with velocity v is acted by, , three forces shown by the vector tangle PQR., The velocity of the particle will, , P, R Q, (a) decrease, (b) remain constant, (c) change according to the smallast force QR, (d) increase, , lonised hydrogen atoms and ct -particles with, same momenta enters perpendicular to a, constant magnetic field, B., , The ratio of their radii of their paths 2%, , will be, , 30., , {a) 1:2 (b) 4:1, (c) 1:4 (dj2:1, , 31. The unit of thermal conductivity is :, (a) Jm"' K" (b) Wm K, (c) WK" (d) Jmk

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32., , 35., , 36., , , , wy yee" 2, , A coil of 800 turns effective area 0,05 m? is, kept perpendicular to a magnetic field, , s , ;, 510° T. When the plane of the coil is, , rotated by 90° around any of its co-planar axis, in 0.1 's, the emf induced in the coil will be, , (a)0.2V (b)2x10°V, (c) 0.02 V (d)2V, , A dise of radius 2. m and mass 100 kg rolls on, a horizontal floor. Its centre of mass has, speed of 20 cm/s, How much work is needed, to stop it?, (a) 30 kJ, (co) 1d, , {b) 20, (a) 3J, , In an experiment, the percentage of error, occurred in the measurement of physical, quantities A, B,C and D are 1%, 2%, 3% and, 4% respectively. Then the maximum, percentage of error in the measurement X,, , “Bt will be, a3), , Body A of mass 4m moving with speed, collides with another body B of mass 2mm, at, rest. The collision is head on and elastic in, nature. After the collision the fraction of, energy lost by the colliding body A is ;, , 8 4 & d), (a) . (b) 5 (c) 3 i 9, , where, XY =, , , , cp’, , (a) 16% = (b)-10% —(c) 10%, , The radius of circle, the period of revolution,, initial position and sense of revolution are, indicated in the below fig., , Pit=0), , ~, Te4s, , i “OK, 3am, , y-projection of the radius vector of rotating, particle Pis, , 3H} where yin en, , 37., , 38., , 39., , (c} y= 3cos| = } Where yan im, , 2, , (d) yit) = —Scos2nt, where yin m, , In total internal reflection when the an, le, incidence is equal to the critical Angle a ., pair of media in contact, what will be ange", of refraction?, , (a) 0°, , (b) Equal to angle of incidence, (c) 90°, , (d) 180°, , A solid cylinder of mass 2 kg and radius 4 cy, is rotating about its axis at the rate of 3 rpm,, The torque required to stop after 22, , revolutions is, (a)2 x 10° N-m, (c)2 x 10" N-m, , (b) 12 x 10 Nem, (d)2 «10° N-m, , A block of mass 10 kg is in contact against the, inner wall of a hollow cylindrical drum of, radius 1 m. The coefficient of friction between ”, the block and the inner wall of the cylinder is, 0.1. The minimum angular velocity needed for, the cylinder to keep the block stationary when, the cylinder is vertical and rotating about ils, axis, will be {g =10 m/s* ), , (a) x rad/s (b) 10 rads, , T, , (c) 10m rad/s (a) /70 rads, , A cylindrical conductor of radius 8 is carrying, a constant current. The plot of the magnitude, of the magnetic field B with the distance 4, from the centre of the conductor, is correct, represented by the figure, , B B, , {a) (b), , , , , , (c)

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4f. In the circuits shown below, the readings of, , yoltmeters and the ammeters will be, , 199 i;, A le, , , , , , , , , , ®), , ®, , , , 10¥, 100 ig, , , , 100, , , , , , 10Vv, , (a) V, = V, andi, >/,, fo) ¥ =V, andi, =/,, (co) V, > V, andi, >/,, (dV >V andi, =i,, , 42., , Increase in temperature of a gas filled ina, container would lead to, , (a) increase in its kinetic energy, , (b) decrease in its pressure, , (c) decrease in interrnolecular 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, (a) 113.9em (b) 88cm = [(c)68cem (d)68em, , 44, «-particle consists of, , 45., , (a) 2 electrons, 2 protons and 2 neutrons, (b) 2 electrons and 4 protons only, , {c) 2 protons only, , (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 apparatus is, immersed in water? (u_. = 4/3), , (a)0.15° = (0) 0.051" (c) 0.79 (d) 0.266°