Solved papers for NEET Physics Magnetism NEET PYQ-Magnetism

done NEET PYQ-Magnetism Total Questions - 26

• question_answer1) For protecting a sensitive equipment from the external magnetic field, it should be:                  [AIPMT 1998]
  A)
         placed inside an aluminium can
  done clear
  B)
        placed inside an iron can
  done clear
  C)
        wrapped with insulation around it when passing current through it
  done clear
  D)
        surrounded with fine copper sheet
  done clear
  View Answer play_arrow

• question_answer2) A diamagnetic substance is brought near a strong magnet, then it is:                                         [AIPMT 1999]
  A)
   attracted by a magnet
  done clear
  B)
                    repelled by a magnet
  done clear
  C)
   repelled by north pole and attracted by south pole
  done clear
  D)
        attracted by north pole and repelled by south pole
  done clear
  View Answer play_arrow

• question_answer3) A bar magnet of magnetic moment \[\vec{M}\] is placed in a magnetic field of induction \[\vec{B}\]. The torque exerted on it is:                                                                                                                                      [AIPMT 1999]
  A)
   \[\vec{M}\,\vec{B}\]                 
  done clear
  B)
  \[-\vec{M}\,\vec{B}\]     
  done clear
  C)
   \[\vec{M}\times \,\vec{B}\]
  done clear
  D)
        \[-\vec{M}\times \,\vec{B}\]
  done clear
  View Answer play_arrow

• question_answer4) Tangent galvanometer measures:                                                                          [AIPMT 2001]
  A)
   capacitance
  done clear
  B)
                   current
  done clear
  C)
        resistance
  done clear
  D)
                   potential difference
  done clear
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• question_answer5) In which type of material the magnetic susceptibility does not depend on temperature?             [AIPMT 2001]
  A)
         Diamagnetic     
  done clear
  B)
        Paramagnetic
  done clear
  C)
   Ferromagnetic
  done clear
  D)
       Ferrite
  done clear
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• question_answer6) Two bar magnets having same geometry with magnetic moments M and 2M, are firstly placed in such a way that their similar poles are on the same side; then its period of oscillation is \[{{T}_{1}}\]. Now the polarity of one of the magnets is reversed, then time period of oscillations will be:                                                                                           [AIPMT 2002]
  A)
   \[{{T}_{1}}<{{T}_{2}}\]
  done clear
  B)
                    \[{{T}_{1}}>{{T}_{2}}\]
  done clear
  C)
   \[{{T}_{1}}={{T}_{2}}\]
  done clear
  D)
                    \[{{T}_{2}}=\,\infty \]
  done clear
  View Answer play_arrow

• question_answer7) A bar magnet is oscillating in the earth's magnetic field with a period T. What happens to its period and motion if its mass is quadrupled?                                                                                                                   [AIPMT 2003]
  A)
   Motion remains SH with time period \[=4T\]
  done clear
  B)
        Motion remains SH and period remains nearly constant
  done clear
  C)
        Motion remains SH with time period \[=T/2\]
  done clear
  D)
        Motion remains SH with time period \[=2T\]
  done clear
  View Answer play_arrow

• question_answer8) A diamagnetic material in a magnetic field moves:                                                                     [AIPMT 2003]
  A)
   perpendicular to the field
  done clear
  B)
        from weaker to the stronger parts of the field
  done clear
  C)
   from stronger to the weaker parts of the field
  done clear
  D)
        in none of the above directions
  done clear
  View Answer play_arrow

• question_answer9) According to Curie's law, the magnetic susceptibility of a paramagnetic substance at an absolute temperature T is proportional to:                                                                                                                                [AIPMT 2003]
  A)
         \[\frac{1}{{{T}^{2}}}\]                      
  done clear
  B)
        \[{{T}^{2}}\]
  done clear
  C)
   \[\frac{1}{T}\]             
  done clear
  D)
        T
  done clear
  View Answer play_arrow

• question_answer10) If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by \[{{\mu }_{d}},{{\mu }_{p}}\] and \[{{\mu }_{f}}\] respectively, then:   [AIPMT (S) 2005]
  A)
   \[{{\mu }_{d}}\ne 0\] and \[{{\mu }_{f}}\ne 0\]
  done clear
  B)
   \[{{\mu }_{p}}=0\] and \[{{\mu }_{f}}\ne 0\]
  done clear
  C)
  \[{{\mu }_{d}}=0\] and \[{{\mu }_{p}}\ne 0\]   
  done clear
  D)
   \[{{\mu }_{d}}\ne 0\] and \[{{\mu }_{p}}=0\]
  done clear
  View Answer play_arrow

• question_answer11) Above Curie temperature:                                                                                     [AIPMT (S) 2006]
  A)
   a ferromagnetic substance becomes paramagnetic
  done clear
  B)
        a paramagnetic substance becomes  diamagnetic
  done clear
  C)
        a diamagnetic substance becomes paramagnetic
  done clear
  D)
        a paramagnetic substance becomes ferromagnetic
  done clear
  View Answer play_arrow

• question_answer12) Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature, then it will show:                                                                                        [AIPMT (S) 2007]
  A)
   paramagnetism
  done clear
  B)
                    anti-ferromagnetism
  done clear
  C)
   no magnetic property
  done clear
  D)
   diamagnetism
  done clear
  View Answer play_arrow

• question_answer13) Curie temperatures is the temperature above which                          [AIPMPT (S) 2008]
  A)
   ferromagnetic    material    becomes paramagnetic material
  done clear
  B)
   paramagnetic    material    becomes         diamagnetic material                       
  done clear
  C)
   paramagnetic    material    becomes        ferromagnetic material
  done clear
  D)
   ferromagnetic    material    becomes         diamagnetic material                        
  done clear
  View Answer play_arrow

• question_answer14) The magnetic moment of a diamagnetic atom is                             [AIPMT (M) 2010]
  A)
   much greater than one
  done clear
  B)
   one
  done clear
  C)
   between zero and one
  done clear
  D)
   equal to zero
  done clear
  View Answer play_arrow

• question_answer15) 

  Two identical bar magnets are fixed with their centres at a distance d apart. A stationary charge Q is placed at P in between the gap of the two magnets at a distance D from the centre O as shown in the figure

  The force on the charge Q is                                                                                        [AIPMT (M) 2010]

  A)
   zero
  done clear
  B)
   directed along OP
  done clear
  C)
   directed along PO
  done clear
  D)
   directed perpendicular to the plane of paper
  done clear
  View Answer play_arrow

• question_answer16) A short bar magnet of magnetic moment \[0.4J\,{{T}^{-1}}\] is place in a uniform magnetic field of 0.16 T. The magnet is stable equilibrium when the potential energy is                                                        [AIPMT (M) 2011]
  A)
   \[-\,0.64\,J\]     
  done clear
  B)
        zero
  done clear
  C)
   \[-\text{ }0.082\,J\]       
  done clear
  D)
        \[0.064\text{ }J\]
  done clear
  View Answer play_arrow

• question_answer17) 

  There are four light-weight-rod samples A, B, C, D separately suspended by threads. A bar magnet is slowly brought near each sample and the following observations are noted                                                        [AIPMT (S) 2011]

  (i) A is feebly repelled

  (ii) B is feebly attracted

  (iii) C is strongly attracted

  (iv) D remains unaffected

  Which one of the following is true?

  A)
   C is of a diamagnetic material
  done clear
  B)
   D is of a ferromagnetic material
  done clear
  C)
   A is of a non-magnetic material
  done clear
  D)
   B is of a paramagnetic material
  done clear
  View Answer play_arrow

• question_answer18) A magnetic needle suspended parallel to a magnetic field requires \[\sqrt{3}\,J\] of work to turn it through \[{{60}^{o}}\]. The torque needed to maintain the needle in this position will be                                      [AIPMT (M) 2012]
  A)
   \[2\sqrt{3}\,J\]  
  done clear
  B)
        \[3\,J\]
  done clear
  C)
   \[\sqrt{3}\,J\]   
  done clear
  D)
        \[\frac{3}{2}\,\,J\]
  done clear
  View Answer play_arrow

• question_answer19) A compass needle which is allowed to move in a horizontal plane is taken to a geomagnetic pole. It   [AIPMT (S) 2012]
  A)
   will become rigid showing no movement
  done clear
  B)
   will stay in any position
  done clear
  C)
   will stay in north-south direction only
  done clear
  D)
   will stay in east-west direction only
  done clear
  View Answer play_arrow

• question_answer20) 

  A bar magnet of length \[I\] and magnetic dipole moment M is bent in the form of an arc as shown in figure. The new magnetic dipole moment will be                                                                                             [NEET 2013]

  A)
   M                   
  done clear
  B)
        \[\frac{3}{\pi }M\]
  done clear
  C)
   \[\frac{2}{\pi }M\]        
  done clear
  D)
        \[\frac{M}{2}\]
  done clear
  View Answer play_arrow

• question_answer21) 

  Following figures show the arrangement of bar magnets in different configurations. Each magnet has magnetic dipole moment m. Which configuration has highest net magnetic dipole moment?                                    [NEET 2014]

  (i)       (ii)          (ii)         (iv)

  A)
   (i)      
  done clear
  B)
        (ii)       
  done clear
  C)
   (iii)                  
  done clear
  D)
        (iv)
  done clear
  View Answer play_arrow

• question_answer22) The magnetic susceptibility is negative for :                                                             [NEET - 2016]
  A)
   diamagnetic material only
  done clear
  B)
   paramagnetic material only
  done clear
  C)
   ferromagnetic material only
  done clear
  D)
   paramagnetic and ferromagnetic materials
  done clear
  View Answer play_arrow

• question_answer23) If \[{{\theta }_{1}}\] and \[{{\theta }_{2}}\] be the apparent angles of dip observed in two vertical planes at right angles to each other, then the true angle of dip \[\theta \] is given by                                                   [NEET-2017]
  A)
   \[{{\tan }^{2}}\theta ={{\tan }^{2}}{{\theta }_{1}}-{{\tan }^{2}}{{\theta }_{2}}\]
  done clear
  B)
   \[{{\cot }^{2}}\theta ={{\cot }^{2}}{{\theta }_{1}}+{{\cot }^{2}}{{\theta }_{2}}\]
  done clear
  C)
   \[{{\tan }^{2}}\theta ={{\tan }^{2}}{{\theta }_{1}}+{{\tan }^{2}}{{\theta }_{2}}\]
  done clear
  D)
   \[{{\cot }^{2}}\theta ={{\cot }^{2}}{{\theta }_{1}}-{{\cot }^{2}}{{\theta }_{2}}\]
  done clear
  View Answer play_arrow

• question_answer24)   A thin diamagnetic rod is placed vertically between the poles of an electromagnet. When the current in the electromagnet is switched on, then the diamagnetic rod is pushed up, out of the horizontal magnetic field. Hence the rod gains gravitational potential energy. The work required to do this comes from                                         [NEET - 2018]
  A)
   The lattice structure of the material of the rod
  done clear
  B)
   The magnetic field
  done clear
  C)
   The current source
  done clear
  D)
   The induced electric field due to the changing magnetic field
  done clear
  View Answer play_arrow

• question_answer25) At a point A on the earth’s surface the angle of dip,\[\delta =+25{}^\text{o}\]. At a point B on the earth’s surface the angle of dip,\[\delta =25{}^\text{o}\]. We can interpret that:                                                                  [NEET 2019]
  A)
   A is located in the northern hemisphere and B is located in the southern hemisphere
  done clear
  B)
   A and B are both located in the southern hemisphere
  done clear
  C)
   A and B are both located in the northern hemisphere
  done clear
  D)
   A is located in the southern hemisphere and B is located in the northern hemisphere
  done clear
  View Answer play_arrow

• question_answer26) 

  An iron rod of susceptibility 599 is subjected to a magnetizing field of \[1200\text{ }A\text{ }{{m}^{1}}\].

  The permeability of the material of the rod is:

  \[({{\mu }_{0}}=4\pi \times {{10}^{-7}}T\,m\,{{A}^{-1}})\]                                                                                                                                    [NEET 2020]

  A)
   \[8.0\times {{10}^{5}}\text{ }T\text{ }m\text{ }{{A}^{1}}\]
  done clear
  B)
   \[2.4\pi \times \text{ }{{10}^{5}}\text{ }T\text{ }m\text{ }{{A}^{1}}\]
  done clear
  C)
   \[2.4\pi \times {{10}^{7}}\text{ }T\text{ }m\text{ }{{A}^{1}}\]
  done clear
  D)
   \[2.4\pi \times {{10}^{4}}\text{ }T\text{ }m\text{ }{{A}^{1}}\]
  done clear
  View Answer play_arrow