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Magnetism

48 questions · Physics · JEE Advanced
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Magnetism

48 questions · Physics · JEE Advanced

  1. A conducting solid sphere of radius R and mass M carries a charge Q. The sphere is rotating about an axis passing through its center with a uniform angular speed ω. The ratio of the magnitudes of the magnetic dipole moment to…2025 · Shift 2 · Q41 · Numerical
  2. An infinitely long wire, located on the z-axis, carries a current I along the +z-direction and produces the magnetic field B. The magnitude of the line integral ∫B⋅dl along a straight line…2024 · Shift 1 · Q36 · MCQ
  3. A thin stiff insulated metal wire is bent into a circular loop with its two ends extending tangentially from the same point of the loop. The wire loop has mass m and radius r and it is in a uniform vertical magnetic field B0​, as… Includes diagram2024 · Shift 2 · Q38 · MCQ
  4. A positive, singly ionized atom of mass number AM​ is accelerated from rest by the voltage 192 V. Thereafter, it enters a rectangular region of width w with magnetic field B0​=0.1k^ Tesla, as shown… Includes diagram2024 · Shift 2 · Q41 · Multiple correct
  5. A rectangular conducting loop of length 4 cm and width 2 cm is in the xy-plane, as shown in the figure. It is being moved away from a thin and long conducting wire along the direction 23​​x^+21​y^​… Includes diagram2023 · Shift 2 · Q43 · Numerical
  6. A small circular loop of area A and resistance R is fixed on a horizontal xy-plane with the center of the loop always on the axis n^ of a long solenoid. The solenoid has m turns per unit length and carries current I… Includes table Includes diagram2022 · Shift 1 · Q51 · MCQ
  7. Which one of the following options represents the magnetic field B at O due to the current flowing in the given wire segments lying on the xy plane? Includes diagram2022 · Shift 2 · Q54 · MCQ
  8. A long straight wire carries a current, I = 2 ampere. A semi-circular conducting rod is placed beside it on two conducting parallel rails of negligible resistance. Both the rails are parallel to the wire. The wire, the rod and the rails… Includes diagram2021 · Shift 1 · Q53 · Multiple correct
  9. An α-particle (mass 4 amu) and a singly charged sulphur ion (mass 32 amu) are initially at rest. They are accelerated through a potential V and then allowed to pass into a region of uniform magnetic field which is normal to the…2021 · Shift 1 · Q55 · Numerical
  10. Two concentric circular loops, one of radius R and the other of radius 2R, lie in the xy-plane with the origin as their common center, as shown in the figure. The smaller loop carries current I1 in the anti-clockwise direction and the… Includes diagram2021 · Shift 2 · Q44 · Multiple correct
  11. A special metal S conducts electricity without any resistance. A closed wire loop, made of S, does not allow any change in flux through itself by inducing a suitable current to generate a compensating flux. The induced current in the loop… Includes diagram2021 · Shift 2 · Q51 · MCQ
  12. A special metal S conducts electricity without any resistance. A closed wire loop, made of S, does not allow any change in flux through itself by inducing a suitable current to generate a compensating flux. The induced current in the loop… Includes diagram2021 · Shift 2 · Q52 · MCQ
  13. A light disc made of aluminium (a nonmagnetic material) is kept horizontally and is free to rotate about its axis as shown in the figure. A strong magnet is held vertically at a point above the disc away from its axis. On revolving the… Includes diagram2020 · Shift 1 · Q51 · MCQ
  14. A circular coil of radius R and N turns has negligible resistance. As shown in the schematic figure, its two ends are connected to two wires and it is hanging by those wires with its plane being vertical. The wires are connected to a… Includes diagram2020 · Shift 1 · Q52 · MCQ
  15. Two infinitely long straight wires lie in the xy-plane along the lines x=±R. The wire located at x=+R carries a constant current I1​ and the wire located at x=−R carries a constant current I2​. A circular loop of…2018 · Shift 1 · Q40 · Multiple correct
  16. In the xy-plane, the region y>0 has a uniform magnetic field B1​k and the region y<0 has another uniform magnetic field B2​k. A positively charged particle is projected from the origin along the… Includes diagram2018 · Shift 1 · Q49 · Numerical
  17. A moving coil galvanometer has 50 turns and each turn has an area 2×10−4m2. The magnetic field produced by the magnet inside the galvanometer is 0.02T. The torsional constant of the suspension wire is 10−4Nmrad−1.…2018 · Shift 2 · Q44 · Numerical
  18. A charged particle (electron or proton) is introduced at the origin (x=0,y=0,z=0) with a given initial velocity v. A uniform electric field E and a uniform magnetic field B exist… Includes table2017 · Shift 1 · Q37 · MCQ
  19. A charged particle (electron or proton) is introduced at the origin (x=0,y=0,z=0) with a given initial velocity v. A uniform electric field E and a uniform magnetic field B exist… Includes table2017 · Shift 1 · Q49 · MCQ
  20. A charged particle (electron or proton) is introduced at the origin (x=0,y=0,z=0) with a given initial velocity v. A uniform electric field E and a uniform magnetic field B exist… Includes table2017 · Shift 1 · Q50 · MCQ
  21. A uniform magnetic field B exist in the region between x=0 and x=23R​(region 2 in the figure) pointing normally into the plane of the paper. A particle with charge +Q and momentum p directed along x-axis enters… Includes diagram2017 · Shift 2 · Q40 · Multiple correct
  22. A symmetric star shaped conducting wire loop is carrying a steady state current I as shown in the figure. The distance between the diametrically opposite vertices of the star is 4a. The magnitude of the magnetic field at the… Includes diagram2017 · Shift 2 · Q45 · MCQ
  23. A conductor (shown in the figure) carrying constant current I is kept in the x-y plane in a uniform magnetic field B. If F is the magnitude of the total magnetic force acting on the conductor, then the correct statements is/are Includes diagram2015 · Shift 1 · Q55 · Multiple correct
  24. In a thin rectangular metallic strip a constant current I flows along the positive x-direction, as shown in the figure. The length, width and thickness of the strip are l, w and d, respectively. A uniform magnetic field B is applied on the… Includes diagram2015 · Shift 2 · Q59 · Multiple correct
  25. In a thin rectangular metallic strip a constant current I flows along the positive x-direction, as shown in the figure. The length, width and thickness of the strip are l, w and d, respectively. A uniform magnetic field B is applied on the… Includes diagram2015 · Shift 2 · Q60 · Multiple correct
  26. Two parallel wires in the plane of the paper are distance X0 apart. A point charge is moving with speed u between the wires in the same plane at a distance X1 from one of the wires. When the wires carry current of magnitude I in the same…2014 · Shift 1 · Q57 · Numerical
  27. The figure shows a circular loop of radius a with two long parallel wires (numbered 1 and 2) all in the plane of the paper. The distance of each wire from the centre of the loop is d. The loop and the wires are carrying the same current I.… Includes diagram2014 · Shift 2 · Q52 · MCQ
  28. The figure shows a circular loop of radius a with two long parallel wires (numbered 1 and 2) all in the plane of the paper. The distance of each wire from the centre of the loop is d. The loop and the wires are carrying the same current I.… Includes diagram2014 · Shift 2 · Q53 · MCQ
  29. A particle of mass M and positive charge Q, moving with a constant velocity u1​=4i ms − 1 enters a region of uniform static magnetic field, normal to the xy plane. The region of the magnetic field extends…2013 · Shift 1 · Q58 · Multiple correct
  30. A steady current I flows along an infinitely long hollow cylindrical conductor of radius R. This cylinder is placed coaxially inside an infinite solenoid of radius 2R. The solenoid has n turns per unit length and carries a steady current…2013 · Shift 2 · Q48 · Multiple correct
  31. A point charge Q is moving in a circular orbit of radius R in the xy-plane with an angular velocity ω. This can be considered as equivalent to a loop carrying a steady current 2πQω​. A uniform magnetic field…2013 · Shift 2 · Q54 · MCQ
  32. A point charge Q is moving in a circular orbit of radius R in the xy-plane with an angular velocity ω. This can be considered as equivalent to a loop carrying a steady current 2πQω​. A uniform magnetic field…2013 · Shift 2 · Q55 · MCQ
  33. Consider the motion of a positive point charge in a region, there are simultaneous uniform electric and magnetic fields E=E0​j​ and B=B0​j​. At time t = 0, this charge has…2012 · Shift 1 · Q52 · Multiple correct
  34. A cylinder cavity of diameter a exists inside a cylinder of diameter 2a as shown in the figure. Both the cylinder and the cavity are infinitely long. A uniform current density J flows along the length. If the magnitude of the magnetic… Includes diagram2012 · Shift 1 · Q60 · Numerical
  35. A loop carrying current l lies in the xy-plane as shown in the figure. The unit vector k is coming out of the plane of the paper. The magnetic moment of the current loop is Includes diagram2012 · Shift 2 · Q51 · MCQ
  36. An infinite long hollow conducting cylinder with inner radius R/2 and outer radius R carries a uniform current density along its length. The magnitude of the magnetic field, ​B​ as a function of the…2012 · Shift 2 · Q52 · MCQ
  37. A dense collection of equal number of electrons and positive ions is called neutral plasma. Certain solids containing fixed positive ions surrounded by free electrons can be treated as neutral plasma. Let 'N' be the number density of free…2011 · Shift 1 · Q48 · MCQ
  38. An electron and a proton are moving on straight parallel paths with same velocity. They enter a semi-infinite region of uniform magnetic field perpendicular to the velocity. Which of the following statement(s) is/are true?2011 · Shift 1 · Q62 · Multiple correct
  39. A long circular tube of length 10 m and radius 0.3 m carries a current I along its curved surface as shown. A wire-loop of resistance 0.005 Ω and of radius 0.1 m is placed inside the tube with its axis coinciding with the axis of… Includes diagram2011 · Shift 1 · Q69 · Numerical
  40. A long insulated copper wire is closely wound as a spiral of N turns. The spiral has inner radius a and outer radius b. The spiral lies in the xy-plane and a steady current I flows through the wire. The z-component of the magnetic field at… Includes diagram2011 · Shift 2 · Q51 · MCQ
  41. A thin flexible wire of length L is connected to two adjacent fixed points and carries a current I in the clockwise direction, as shown in the figure. When the system is put in a uniform magnetic field of strength B going into the plane of… Includes diagram2010 · Shift 1 · Q70 · MCQ
  42. Electrical resistance of certain materials, known as superconductors, changes abruptly from a non-zero value to zero as their temperature is lowered below a critical temperature Tc(0). An interesting property of superconductors is that… Includes diagram2010 · Shift 1 · Q75 · MCQ
  43. Electrical resistance of certain materials, known as superconductors, changes abruptly from a non-zero value to zero as their temperature is lowered below a critical temperature Tc(0). An interesting property of superconductors is that… Includes diagram2010 · Shift 1 · Q76 · MCQ
  44. A steady current I goes through a wire loop PQR having shape of a right angle triangle wit6h PQ = 3, PR = 4x and QR = 5x. If the magnitude of the magnetic field at P due to this loop is k(48πxμ0​I​),…2009 · Shift 2 · Q52 · Numerical
  45. A particle of mass m and charge q, moving with velocity v enters Region II normal to the boundary as shown in the figure. Region II has a uniform magnetic field B perpendicular to the plane of the paper. The length of the Region II is l.… Includes diagram2008 · Shift 1 · Q55 · Multiple correct
  46. STATEMENT 1 : The sensitivity of a moving coil galvanometer is increased by placing a suitable magnetic material as a core inside the coil. and STATEMENT 2 : Soft iron has a high magnetic permeability and cannot be easily magnetized or…2008 · Shift 2 · Q57 · MCQ
  47. A magnetic field B=B0​j^​ exists in the region a<x<2a and B=−B0​j^​, in the region 2a<x<3a, where B0​ is a… Includes diagram2007 · Shift 2 · Q16 · MCQ
  48. Two wires each carrying a steady current I are shown in four configurations in Column I. Some of the resulting effects are described in Column II. Match the statements in Column I with the statements in Column II and indicate your answer… Includes table Includes diagram2007 · Shift 2 · Q29 · MCQ