A galvanometer coil has turns and each turn has an average area . If a torque of is required to keep this coil parallel to a magnetic field when a current of is flowing through it, the strength of the field (in ) is _______.
Option: 1 20
Option: 2 10
Option: 3 22
Option: 4 30
As coil is parallel to magnetic field, the Area vector or Magnetic Moment is perpendicular to magnetic field i.e.,
Torque applied due to magnetic field when angle between magnetic moment and magnetic field is
Study 40% syllabus and score up to 100% marks in JEE