A circular coil of radius R carries an electric current. The magnetic field due to the coil at a point on the axis of the coil located at a distance r from the center of the coil, such that r>>R, varies as1) 1/r2) 1/(r)^(3/2)3) 1/r^24) 1/r^3
silky srivastava , 6 Years ago
Grade 12
3 Answers
Arun
Last Activity: 6 Years ago
Dear student
When r >> R Mgnetic field at a point on the axis of a loop is given by B = (mu /2 * pi) (AI/ r³) Hence B is proportional to 1/r³ Hence Correct option is D