what is end on or broad side on position?

In what context ?

It is important to meintion that.

If i presume correctly you are asking about electric dipoles.

End on position are points on the extended dipole axis(line connecting +q & -q extended to both sides)

Broad side on position are points on the perpendicular bisector line of dipole axis.

hi Pallavi,

1)end on position is the position of the test charge on the axial line of the dipole(i.e it is on the line joining -ve charge & +ve) charge of a dipole)

2)broad side on position is the position of test charge on equatorial line of the dipole(i.e it is on the line perpendicular to the axial line and passing through the center )