Field and Wave Electromagnetics 2nd Edition by David Cheng

Exercise 66

Determine the work done in carrying a - 2 ( C ) charge from P 1 (2, 1 , -1) to P 2 (8, 2, -l) in the field E = a x y + a y x
a) along the parabola x = 2 y 2 ,
b) along the straight line joining P 1 and P 2.