JEE Main & Advanced Physics Magnetism Question Bank

done Numerical Value Type Questions - Magnetic and Matter Total Questions - 15

• question_answer1)
  The ratio of magnetic fields due to a smaller bar magnet in the end on position to broad side on position is-
  View Solution play_arrow

• question_answer2)
  A current of 3A is flowing in a plane circular coil of radius 4 cm and number of turns 20. The coil is placed in a uniform magnetic field of magnetic induction 0.5 T. Then the dipole moment (in \[A{{m}^{2}}\]) of the coil is ?
  View Solution play_arrow

• question_answer3)
  Magnetic field intensity due to a dipole varies as \[{{d}^{-n}}\], where\[n=\]
  View Solution play_arrow

• question_answer4)
  A short bar magnet place with its axis at \[30{}^\circ \], with a uniform external magnetic field of\[0.25\text{ }T\]experiences a torque of \[4.5\times {{10}^{-2}}N-m\]Magnetic moment (in J/T) of the magnet is-
  View Solution play_arrow

• question_answer5)
  A closely wound solenoid of 800 turns has area of cross section\[2.5c{{m}^{2}}\]. Magnetic moment (in J/T) associated with it, when it carries a current of 3 A is-
  View Solution play_arrow

• question_answer6)
  Force acting on a magnetic pole of \[7.5\times {{10}^{-2}}A-m\]is 1.5 N. Magnetic field (in \[wb/{{m}^{2}}\]) at the point is ?
  View Solution play_arrow

• question_answer7)
  Two magnets A and B are equal in length, breadth and mass, but their magnetic moments are different. If the time period of B in a vibration magnetometer is twice that of A, then the ratio of magnetic moments will be-
  View Solution play_arrow

• question_answer8)
  The period of oscillation of a bar magnet in a vibration magnetometer is 2 Sec. The period (in sec) of oscillation of a bar magnet whose magnetic moment is 4 times that of 1st magnet is-
  View Solution play_arrow

• question_answer9)
  The time period of oscillation of a magnet in a vibration magnetometer is 1.5 sec. The time period (in sec) of oscillation of another magnet similar in size, shape and mass but having ¼ magnetic moment than that of the 1st magnet oscillating at the same place will be-
  View Solution play_arrow

• question_answer10)
  The period of oscillation of a magnet in a vibration magnetometer is 2 seconds. The period (in sec) of oscillation of a magnet of moment of inertia four times that of the first magnet is-
  View Solution play_arrow

• question_answer11)
  A rod of ferromagnetic material with dimensions \[10cm\times 0.5cm\times 0.2cm\] is placed in a magnetic intensity of \[0.5\times {{10}^{4}}amp/m\]as a result of which a magnetic moment of\[5\text{ }amp\,\,{{m}^{2}}\]is produced in the rod. the value of magnetic field (in T ) in material will be-
  View Solution play_arrow

• question_answer12)
  A large magnet is broken into two pieces so that their lengths are in the ratio 2:1. The pole strengths of the two pieces will have ratio-
  View Solution play_arrow

• question_answer13)
  A circular coil of radius 4 cm having 50 turns carries a current of 2A. It is placed in uniform magnetic field of intensity of 0.1\[Weber/{{m}^{2}}\]. The work done (in J) to rotate the coil from the equilibrium position by \[180{}^\circ \] is-
  View Solution play_arrow

• question_answer14)
  Two short bar magnet of magnetic moments \[{{M}_{1}}\]and \[{{M}_{2}}\]are kept on X and Y axis as shown is figure. If resultant magnetic field at origin is zero, Then \[\frac{{{M}_{1}}}{{{M}_{2}}}\]will be
  View Solution play_arrow

• question_answer15)
  The work done in turning a magnet of magnetic moment M by an angle of \[90{}^\circ \]from the meridian is n times the corresponding work done to turn it through an angle of\[60{}^\circ \]. Then-
  View Solution play_arrow