Upcoming SlideShare
×

AIPMT Physics 2008

406 views

Published on

Published in: Education, Technology
0 Likes
Statistics
Notes
• Full Name
Comment goes here.

Are you sure you want to Yes No
• Be the first to comment

• Be the first to like this

Views
Total views
406
On SlideShare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
0
0
Likes
0
Embeds 0
No embeds

No notes for slide
• aaa
• AIPMT Physics 2008

1. 1. aipmt–Past papers<br />PHYSICS- UNSOLVED PAPER - 2008<br />
2. 2. SECTION – I (Total Marks : 50)<br />Single Correct Answer Type<br />There are five parts in this question. Four choices are given for each part and one of them is correct. Indicate you choice of the correct answer for each part in your answer-book by writing the letter (a), (b), (c) or (d) whichever is appropriate<br />
3. 3. 01<br />Problem<br />A particle of arms m is projected with velocity v making an angle of 45° with the horizontal. Ehen the particle lands on the level ground the magnitude of the change in the momentum will be<br />mv√2<br />Zero<br />2mv<br />Mv/√2<br />
4. 4. Problem<br />02<br />A long solenoid has 500 turns. When a current of 2 ampere is passed trough it, the resulting magnetic flux liked with each turn of the solenoid is Wb. The self- inductance of the solenoid is<br />henry<br />henry<br />2.5 henry<br />2.0 henry<br />
5. 5. Problem<br />03<br />A particle of mass m, charge Q & kinetic energy T enters a transverse uniform magnetic field of induction . After 3 seconds the kinetic energy of the particle will be<br />T<br />4T<br />3T<br />2T<br />
6. 6. Problem<br />04<br />The distance travel by a particle starting from rest & moving with acceleration 4/3 ms-2, in the third second is<br />10/3 m<br />19/3 m<br />6 m<br />4 m<br />
7. 7. Problem<br />05<br />A particle of mass 1mg has the same wavelength as an electron moving with a velocity of3x106ms-1. The velocity of the particle is<br />3x10-31m/s-1<br />2.7x10-21m/s-1<br />2.7x10-18m/s-1<br />9x10-2m/s-1<br />
8. 8. Problem<br />06<br />Sand is been dropped on a conveyer belt at the rate of M kg/s. the force necessary to keep the belt moving with a constant velocity of v m/s will be<br />Mv/2 neutron<br />Zero<br />Mv neutron<br />Mv neutron<br />
9. 9. Problem<br />07<br />A thin conducting ring of radius R is given by a charge +Q. the electric field at the center O of the ring is due to the charge on the part AKB of the ring is E. the electric field at the center due to the charge on the part ACDB of the ring is<br />fig<br /> <br />E along KO<br />3E along OK<br />3E along KO<br />E along OK<br />
10. 10. Problem<br />08<br />Two nuclei have there mass number in the ratio of 1:3. The ratio of the nuclear densities would be<br /> (3)1/2:1<br />1:1<br />1:3<br />3:1<br />
11. 11. Problem<br />09<br />If M (A;Z), MP& Mn denote the masses of the nucleus , proton & neutron respectively in units of u ( 1u=931.5 Mev/c2) & BE represent its bonding energy in MeV , then<br />M(A,Z)=ZMP+(A-Z)Mn-BE<br />M(A,Z)=ZMP+(A-Z)Mn-BE/c2<br />M(A,Z)=ZMP+(A-Z)Mn+BE/c2<br />M(A,Z)=ZMP+(A-Z)Mn+BE<br />
12. 12. Problem<br />10<br />A particle moves in a straight line with a constant acceleration. It changes its velocity from 10m/s-1 to 20m/s-1while passing through a distance 135m in t second. The value of t is<br />12<br />9<br />10<br />1.8<br />
13. 13. Problem<br />11<br />A particle shows distance- time curve as given in this figure. The maximum instantaneous velocity of the particle is around the point<br />D<br />A<br />B <br />C<br />
14. 14. Problem<br />12<br />An electric kettle takes 4 A current at 2220V. How much time will it take to boil 1 kg of water from temperature 200c? The temperature of boiling water is 1000c<br />12.6 min<br />4.2 min<br />6.3 min<br />8.4 min<br />
15. 15. Problem<br />13<br />In the phenomenon of the electric discharge through gases at low pressure, the coloured glow in the tube appear as the result of<br />Collision between the charged particles emitted from the cathode & the atom of the gas<br />Collision between the different electrons of the atoms of the gas<br />Excitation of electrons of the atoms <br />Collision between of the atoms of the gas<br />
16. 16. Problem<br />14<br />The circuit is equivalent to?<br />NOR gate<br />OR gate<br />AND gate<br />NAND gate<br />
17. 17. Problem<br />15<br />If the error of the measurement of the radius of a sphear is 2%, then the error in the determination of volume of the sphere will be<br />8%<br />2%<br />4%<br />6%<br />
18. 18. Problem<br />16<br />A thin road of length L & mass M is bent at its midpoint into two halves so that the angle between them is 900. The moment of inertia of the bend rod about an axis passing through the bending point & perpendicular to the plane defined by the two halves of the rod is<br />ML2/6<br />√2 ML2/24<br />ML2/24<br />ML2/12<br />
19. 19. Problem<br />17<br />A p-n photodiode is made of a material with a band gap of 2.0eV. The minimum frequency of the radiation that can be absorbed by the material is nearly<br />1X1014Hz<br />20X1014Hz<br />10X1014Hz<br />5X1014Hz<br />
20. 20. Problem<br />18<br />Two periodic wave of intensities pas through a region at the same time in the same direction. The sum of the maximum & minimum intensities is<br /> (√I1-√I2)2<br />2(√I1-√I2)<br />I1+I2<br /> (√I1-√I2)2<br />
21. 21. Problem<br />19<br />If Q, E & W denote respectively the heat added, change in internal energy & the work done in a closed cycle processes, then<br />E=0<br />Q=0<br />W=0<br />Q=W=0<br />
22. 22. Problem<br />20<br />In the circuit shown, the current through the 4 resistor is 1 amp when the point P & M are connected to a d.c. voltage source. The potential difference between the point M & N is<br /> <br />0.5 volt<br />3.2 volt<br />1.5 volt<br />volt<br />
23. 23. Problem<br />21<br />On a new scale of temperature & called the W scale , the freezing & boiling points of water are 390W&2390W respectively. What will be the temperature on the new scale, corresponding to a temperature of 390on the Celsius scale?<br />2000W<br />1390W<br />780W<br />1170W<br />
24. 24. Problem<br />22<br />The wave described by y=0.25 sin (10πx - 2πt), where x & y are in meter & t in seconds, is a wave travelling along the<br />+ve x direction with frequency 1 Hz & wavelength 0.2m<br />-ve x direction with amplitude 0.25m & wavelength 0.2m<br />-ve x direction with frequency 1 Hz<br />+ve x direction with frequency πHz & wavelength λ= 0.2m<br />
25. 25. Problem<br />23<br />The electrical potential at appoint in free space due to charge Q coulomb is Qx1011volts.. The electric field at that point is<br />4nE0Qx1020volts/m<br />12nE0Qx1022volts/m<br />4nE0Qx1022volts/m<br />12nE0Qx1020volts/m<br />
26. 26. Problem<br />24<br />The velocity of an electromagnetic radiation is an medium of permittivity Є0 & permeability μ0 is given by<br />1/√μ0Є0<br />√μ0/Є0<br />√Є0/ μ0<br />√μ0Є0<br />
27. 27. Problem<br />25<br />Two points are located at a distance of 10m & 15m from the source of oscillation. The period of oscillation is 0.05sec & the velocity of the waves 300m/sec. what is the phase difference between the oscillation of two points?<br />π<br />π/6<br />π/3<br />2π/3<br />
28. 28. Problem<br />26<br />Two simple harmonic motions of angular frequency 100 & 1000 rad s-1 have the same displacement amplitude. The ratio of there maximum acceleration is<br />1:103<br />1:104<br />1: 10<br />1:102<br />
29. 29. Problem<br />27<br />If the lattice parameter for a crystalline structure is 3.6 Å, than the atomic radius in fcc crystal is<br />2.92Å<br />1.27Å<br />1.81Å<br />2.10Å<br />
30. 30. Problem<br />28<br />Water falls from a height of 60m at the ratio of 15kg/s to operate a turbine. The losses due to fractional forces are 10% of energy. How much power is generated by the turbine? (g= 10m/m/s2)<br />12.3 KW<br />KW<br />8.1 KW<br />10.2 KW<br />
31. 31. Problem<br />29<br />The energy require to charge a parallel plate condenser of plate separation d & plate area of cross-section A such that the uniform electric field between the plates E, is<br />Є0E0Ad<br />1/2Є0E0Ad<br />1/2Є0E0/Ad<br />Є0E0/Ad<br />
32. 32. Problem<br />30<br />A boy is trying to start a fire by focusing sunlight on a piece of paper using an equiconvex lens of focal length 10cm. the diameter of the sun is 1.39x109m& its mean distance from the earth is 1.5x1011m. what is the diameter of the sun’s image on the paper ?<br />6.5x10-5m<br />12.4x104m<br />9.2x10-4m<br />6.5x10-4m<br />
33. 33. Problem<br />31<br />A closed loop PQRS carrying a current is placed in a uniform magnetic field. If the magnetic forces on segments PS, SR & RQ are F1,F2&F3 respectively & are in plane of the paper & along the direction shown, the force on the segment QP is<br />√(F3-F1)2-F22<br />F3-F1+F2<br />F3-F1-F2<br />√ (F3-F1)2+F22<br />
34. 34. Problem<br />32<br />A wire of certain material is stretched slowly by 10%. Its new resistance & specific resistance become respectively<br />Both remain the same<br />Times, 1.1 times<br />Times, 1.1 times<br />1.21 Times, same<br />
35. 35. Problem<br />33<br />Curie temperature above which<br />Paramagnetic material become ferromagnetic material.<br />Ferromagnetic material become diamagnetic material.<br />Ferromagnetic material become Paramagnetic material.<br />Paramagnetic material become diamagnetic material.<br />
36. 36. Problem<br />34<br />Which of the following five physical parameters have the same dimensions?<br />Energy density<br />Refractive index<br />Dielectric constant<br />Young’s modulus<br />Magnetic field<br />1 & 4<br />1&5<br />2&4<br />3&5<br />
37. 37. Problem<br />35<br />The ground state energy of hydrogen atom is -13.6 eV . When its electron is in the first excited state, its excitation energy is<br />10.2 eV<br />0<br />3.4 eV<br />6.8 eV<br />
38. 38. Problem<br />36<br />The voltage gain of an amplifier with 9% negative feedback is 10. The voltage gain without feedback will be<br />1.25<br />100<br />90<br />10<br />
39. 39. Problem<br />37<br />A galvanometer of resistance 50Ω is connected to a battery of 3V along with a resistance of 2950 Ω is series. A full scale deflection of 30 divisions is obtained in the galvanometer. In order to reduce this deflection to 20divisions, the resistance in series should be<br />6050Ω<br />4450Ω<br />5050Ω<br />5550Ω<br />
40. 40. Problem<br />38<br />A shell of mass 200 gm is ejected from a gun of mass 4kg by an explosion that generates 1.05kJ of energy. The initial velocity of shell is<br />40ms-1<br />120ms-1<br />100ms-1<br />80ms-1<br />
41. 41. Problem<br />39<br />In an a.c circuit the e.m.f.(e) & the current(i) at any instant are given respectively by e=E0sinωt,i=I0 sin(ωt-φ). The average power in the circuit over one cycle of a.c. is<br />E0I0/2cosφ <br />E0I0<br />E0I0/2 <br />E0I0/2sinφ <br />
42. 42. Problem<br />40<br />Three forces acting on a body are shown in the figure. To have the resultant force only along the y-direction, the magnitude of the minimum additional force needed is<br />√3/4N<br />√3N<br />0.5 N<br />1.5N<br />
43. 43. Problem<br />41<br />A current of 3 amp. Flows through the 2Ω resistor shown in the circuit. The power dissipated i9n the 5Ω resistor is<br />1 Watt<br />5 Watt<br />Watt<br />Watt<br />
44. 44. Problem<br />42<br />Two radioactive materials X1 & X2 have decay constants 5λ & λ respectively. If initially there have the same number of nuclei, then the ratio of the number of nuclei of X1 to that X2 will be 1/e after a time<br />1/4λ<br />e/λ<br />λ<br />1/2λ<br />
45. 45. Problem<br />43<br />The work function of a surface of a photosensitive material is 6.2eV. the wavelength of the incident radiation for which the stopping potential is 5 V lies in the<br />Infrared region<br />X-ray region<br />UV region<br />Visible region<br />
46. 46. Problem<br />44<br />A point performs simple harmonic oscillation of period T & the equation of motion is given by X=a sin(ωt+n/6). After the elapse of what fraction of the time period the velocity of the point will be equal to half of its maximum velocity?<br />T/3<br />T/12<br />T/8<br />T/6<br />
47. 47. Problem<br />45<br />Two thin lenses of focal lengths f1&f2are in contact & coaxial. The power of the combination is<br />f1+f2/2<br />f1+f2/ f1f2<br />√f1/f2<br />√f2/f1<br />
48. 48. Problem<br />46<br />At 100c the value of density of a fixed mass of an ideal gas divided by its pressure is x. at 1100c this ratio is<br />10/110x<br />283/383x<br />x<br />383/283x<br />
49. 49. Problem<br />47<br />A roller coaster is designed such that riders experienced “weightlessness” as they go round the top of a hill whose radius of curvature is 20m. The speed of the car at the top of the hill is between<br />16 m/s& 17 m/s<br />13 m/s& 14 m/s<br />14 m/s& 15 m/s<br />15 m/s& 16 m/s<br />
50. 50. Problem<br />48<br />A circular disc of radius 0.2m is placed in a uniform magnetic field of induction 1/π(wb/m2) in such a way that its axis makes an angle of 600 with . The magnetic flux linked with the disc is<br />0.08Wb<br />Wb<br />Wb<br />0.06 Wb<br />
51. 51. Problem<br />49<br />The radio of the radii of gyration of a circular disc of that of a circular ring, each of same mass & radius, around their respective axes is<br />√2:1<br />√2:√3<br />√3:√2<br />1:√2<br />
52. 52. Problem<br />50<br />A cell can be balanced against 110cm &100cm of potentiometer wire, respectively with & without being short circuited through a resistance of 10Ω. Its internal resistance is<br />2.0Ω<br />0<br />1.0Ω<br />0.5Ω<br />
53. 53. For solution visit www.vasista.net<br />