Figure (a) and (b) shows the field lines of a single positive and negative changes respectively
(a) Give the signs of the potential difference : `Vp -Vq and V_B - V_A`
(b) Give the sign of the work done by the field in moving a small positive change from Q to P.
(c) Give the sign of the work done by the field in moving a small negative change from B to A.