Question

12. The magnetic field at the centre of a circular loop carrying current I is :

(A) Directly proportional to I
(B) Inversely proportional to I

(C) Directly proportional to I2

(D) Inversely proportional to
${i}^{2}$

Answer 1

a is the correct answer as when i is high then magnetic field also

Answer 2

a is the correct answer....
B= ui/2r