Question

5. An isolated positive charge is shown with field lines radiating from it, as seen on page 21. Some dotted lines sketched show some possible paths along which a test charge might be moved. Which path would involve work done by the field being closest to zero? E A) Path that goes from point A to point B B) Path that goes from point B to point A C) Path that goes from point C to point D D) Path that goes from point E to point F +1

Answer 1

if one moves perpendicular to the field lines. That means one is moving along the equipotential surface.

so moving along equipotential surface means no change in potential( Or potential energy) hence no work is required.

that path is E to F is the path perpendicular to the field lines.

Ans(D)