part 1 of 2 Consider the field due to a uniformly charged disk of radius R. and charge Q. Along the symmetry axis at distance z from the cen- ter, the field has been written in following forms. where Eexact = Eo E1 Eo part 2 of 2 2 R² +2² (1-1/2) (Q/A) 200 Eo To compare the accuracy of different ap- proximations it is convenient to work with the normalized difference to be specified below. The nth order smallness is charac- terized by e" and € = with being the R 2 smallness parameter. In general the nth or- der term takes the form Ce", where C is some finite constant (e.g 0.1

part 1 of 2 Consider the field due to a uniformly charged disk of radius R. and charge Q. Along the symmetry axis at distance z from the cen- ter, the field has been written in following forms. where Eexact = Eo E1 Eo part 2 of 2 2 R² +2² (1-1/2) (Q/A) 200 Eo To compare the accuracy of different ap- proximations it is convenient to work with the normalized difference to be specified below. The nth order smallness is charac- terized by e" and € = with being the R 2 smallness parameter. In general the nth or- der term takes the form Ce", where C is some finite constant (e.g 0.1