#2
 
 
Re: IIT Sample Papers Download
you are looking for IIT JEE Question paper so I have and I am giving you: 1. In the determination of Young’s modulus 2 4MLg Y d = p l by using Searle’s method, a wire of length L = 2m and diameter d = 0.5 mm is used. For a load M = 2.5 kg, an extension l = 0.25 mm in the length of the wire is observed. Quantities d and l are measured using a screw gauge and a micrometer, respectively. They have the same pitch of 0.5 mm. The number of divisions on their circular scale is 100. The contributions to the maximum probable error of the Y measurement (A) due to the errors in the measurements of d and l are the same. (B) due to the error in the measurement of d is twice that due to the error in the measurement of l. (C) due to the error in the measurement of l is twice that due to the error in the measurement of d. (D) due to the error in the measurement of d is four times that due to the error in the measurement of l. 2. A small mass m is attached to a massless string whose other end is fixed at P as shown in the figure. The mass is undergoing circular motion in the xy plane with centre at O and constant angular speed w. If the angular momentum of the system, calculated about O and P are denoted by O L r and P L r respectively, complete paper is in attached pdf file. Feel free to download it: 
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#3
 
 
Re: IIT Sample Papers Download
As you want to get IIT JEE question paper so here I am giving you same: 1. N molecules each of mass m and v velocity collides with a wall of a container and then absorbed, the pressure applied on the wall is : (1) mNV2 (2) mNV2 (3) 2 mNV2 (4) mNV2 3 2 2. The law of far a day is obtained by conservation of : (1) Charge (2) Energy (3) Energy and magnetic field (4) Magnetic field 3. There is a q charge placed in the centre of a cube, then the emergent flux is : (1) q (2) q (3) q (4) q_ 6∈0 8 ∈0 2 ∈0 ∈0 4. Two thin lenses are put close to each other, focal length of the combination is : (1) less than the small focal length (2) more than the bigger focal length (3) equal to the arithmetical average of the focal length (4) equal to the geometrical average of the focal length 5. A car is moving on a horizontal circular path with 10 m/s constant speed. A rigid body is suspended from ceiling of car with a 1 m. long light rod, the angle between rod and path is : (1) 600 (2) 450 (3) 300 (4) zero 6. Two sources of E1 and E2 emf r1 and r2 internal, resistances, are connected in the parallel combination, the emf of the combination is : (1) E1E2 (2) E2r1 + E1r2 (3) E1r1 + E2r2 (4) E1 + E2 E1+E2 r1 + r2 r1 + r2 2 7. In a AC circuit R = 0 ΩΩ, XL = 8ΩΩand XC = 6ΩΩphase difference between voltage and current is : (1) 110 (2) 450 (3) 370(4) 120 8. Relative permeability of a medium is r and relative permittivity is ∈∈∈r then the velocity of an electro magnetic wave is : (1) c (2) √∈rr (3) √0t0 (4) 1 ∈00 r∈r r∈r √ r∈r 9. Ration of radius of two soap bubbles is 2 : 1 then the ratio of their excess pressure is : (1) 2 : 1 (2) 4 : 1 (3) 1 : 4 (4) 1: 2 10. Ratio of sound velocities is H2 and O2 will be : (1) 32 : 1 (2) 1 : 4 (3) 16 : 1 (4) 4 : 1 11. In which of the waves the energy is not propagated : (1) em waves (2) longitudional waves (3) stationary waves (4) transverse waves 12. A body of 2 kg. mass is moving under a force, relation between time and displacement is x = t3 where x in meter and t in time work done in first two seconds is : 3 (1) 1.6 J (2) 16 J (3) 160 J (4) 1600 J 13. A uniform chain of L length and M mass, two third part of chain is on a frictionless table and one third part is vertically suspended, work done to pull the whole chain on table, is : (1) MgL (2) MgL (3) MgL (4) MgL 18 9 6 3 14. If the intensity and frequency of incident light is doubled then : (1) photo electric current will become is times (2) kinetic energy of the emitted electron will be increased and current will be 2 times (3) kinetic energy of electrons will be 4 times (4) the kinetic energy of electrons will be 2 times 15. A car travels half distance with 40 kmph and rest half distance with 60 kmph then the average speed of car is : (1) 60 kmph (2) 52 kmph (3) 48 kmph (4) 40 kmph 16. Two particle are moving with same velocities in the circular paths of r1 and r2 radius then the ratio of their centripetal forces is : (1) r2 (2) r2 (3) r1 2 (4) r2 2 r1 √ r1 r2 r1 17. No. of electrons in the 92 U 235 nucleus is : (1) 143 (2) 235 (3) 92 (4) zero 18. The wavelength of photon and electron is ph and e and energy (E) of the two is same then : (1) the difference can be obtain if E is given (2) e>ph (3) ph . e (4) ph=e 19. A lift is moving with acceleration a in upward direction then the force applied by mass m on the floor of lift will be : (1) ma (2) m(ga) (3) m(g+a) (4) mg 20. Two cars of m1 and m2 mass are moving in the circular paths of r1 and r2 radius, their speed is such that they travels one cycle in the same time, the ratio of their angular velocities is : (1) m1r1 : m2r2 (2) 1 : 1 (3) r1 : r2 (4) m1 : m2 21. A ring of mass M, radius r is moving with angular velocity w, if another two bodies each of mass m is placed on its diameter, the resultant angular velocity will be : (1) w(M + 2m) (2) w(M – 2m) (3) wM (4) wM M (M + 2m) (m+m) (M+2m) 22. The wavelength of 1 ke V photon 1.25 x 109 m the frequency of Me V photon will be: (1) 1.24 x 1023 (2) 2.4 x 1023 (3) 2.4 x 1023 (4) 1.24 x 1015 23. Size of nucleusis of the order of : (1) 1013 cm (2) 1010 cm. (3) 108 cm. (4) 1015 cm. 25. In a uniform circular motion : (1) both acceleration and speed changes (2) both acceleration and speed are constant (3) both acceleration and velocity are constant (4) both acceleration and velocity changes 26. Ratio of average kinetic evergies of H2 and O2 at a given temp. is : (1) 1 : 1 (2) 1 : 4 (3) 1 : 8 (4) 1 : 16 27. To make the working of a machine, free of magnetism, the cover of this machine must be of : (1) non magnetic substance (2) diamagnetic substance (3) paramagnetic substance (4) ferro magnetic substance 29. Angular momentum of electron of H atom is proportional to : (1) 1 (2) 1 (3) √r (4) r2 r √ r 30. MI, rotational kinetic energy and angular momentum of a body is I, E and L then : (1) E= L2 (2) E2= 2I (3) E = 2IL (4) L = E2 2I L 2I 31. In a diode value, the state of saturation can be obtained easily by : (1) high plate voltage and high filament (2) low filament current and high plate voltage (3) low plate voltage and high plate tem (4) high filament current and high plate voltage 32. A magnet is dropped in a long coppertube vertically, the acceleration of magnet : (1) equal to g (2) less than g (3) zero (4) greater than g 33. Joulesecond is unit of : (1) rotational power (2) angular momentum (3) rotational energy (4) torgue 34. A 3 coulomb charge enerts 3000 N force in a uniform electrical field, the distance between two points is 1 cm. potential difference will be : (1) 9000 V (2) 1000 V (3) 90 V (4) 10 V 35. 1000 drops, each v volt, are combined to form a big drop, then the potential of the drop will be how many times : (1) 1 (2) 10 (3) 100 (4) 1000 36. A plane is revoloving around the earth with 100 km./hr. speed at a earth, the changes in the velocity as it travels half circle is : (1) 100 √2 kmph (2) 150 kmph (3) 200 kmph (4) zero 37. 3 x 107 kg. water is initially constant and it is displaced 3 m. by applying 5 x 104 N force. Velocity of water will be (if resistance of water is zero) : (1) 50 m/sec. (2) 0 1 m/sec. (3) 60 m/sec. (4) 1.5 m/sec. 38. In a wheat stone circuit P = Q = 10Ωand R = S = 15 Ωand G = 20 Ω. If a cell of 1.5 volt emf is used, the current drawn from the cell is : (1) 0.021 amp (2) 0.025 amp (3) 0.060 amp (4) 0.125 amp 39. Two waves of same frequency and different amplitude, if the phase difference is /2 then the Lissajou’s figure will be : (1) 8 shape (2) an ellipse (3) a circle (4) a straight line 40. A monoatomic gas (r = 5/3) and a diatomic gas (r= 7/5) are mixed in equal ratio then the r of mixture will be : (1) 3.07 (2) 1.53 (3) 1.5 (4) 1.4 41. Velocity of e.m. waves in paraffine is 2.07 x 108 m/sec. then the dielectric constant is: (1) 2.10 (2) 1.87 (3) 1.45 (4) 1.22 42. After emission of a particle, the nucleus : (1) A – 4, Z – 2 (2) A,Z1 (3) A, Z2 (4) A + 2, Z 43. Charge on a proton is 9.6 x 107 c/kg. A proton is moving in a 1T magnetic field in 0.5 m radius circular path, the energy of proton in Mev. (1) 16.34 (2) 12.02 (3) 8.25 (4) 4.84 44. If d2+ x = 0 then the angular frequency will be : dx2 (1) √(2) 2 (3) (4) zero 45. Noble prize presented to Einstein for : (1) therories of LASER (2) photo electric effect (3) theory of relativity (4) theory of specific heat in solids 46. Before saturation current the ratio of plate currents at 400 v and 200 v plate voltage is: (1) 1 (2) 2 (3) 2√2 (4) √2 2 4 47. If I = I0 sin (t  /2) and E = E0 sin t then the power loss is : (1) EI (2) E0I0 (3) E0I0 (4) zero √2 2 √2 48. If the temp. of an ideal gas filled in a container is increased 10C, the increase in pressure is 0.4%, the initial temp. of the gas is : (1) 1200C (2) 2000K (3) 2500K (4) 2500C 49. Plate resistances of two triode values is 2KΩand 4KΩ, amplification factor of each of the value is 400. The ratio of voltage amplifications, when used with 4kΩload resistance, will be : (1) 10 (2) 4/4 (3) 4/3 (4) 16/3 50. Relation between displacement x and time t is x = 2 – 5t + 6t2, the initial velocity will be: (1)3 m/sec. (2) 12 m/sec. (3) 2 m/sec. (4) – 5 m/sec. For full question paper here is the attachment: IIT JEE Question Paper
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