Two circularcoils A and B having n and 2n number of turns have diameters 2d and d. If they carry the same current.A] Which coil producesthe maximum magnetic field at the centre ?B] Which coil produces the minimum magnetic field at the centre ?

Two circularcoils A and B having n and 2n number of turns have diamete

1.	Two circularcoils A and B having n and 2n number of turns have diameters 2d and d. If they carry the same current.A] Which coil producesthe maximum magnetic field at the centre ?B] Which coil produces the minimum magnetic field at the centre ?
Answer» Solution :Magnetic field `B prop (n l)/(d)`. Hence, for COIL A, B `prop (2 n)/(d)` and for COILB, `B prop (2n)/(d)` . THUS, answer are :A] Coil a B and B ] Coil A .