When a megohmmeter is being used to test insulation resistance, current leakage along the surface of the insulation is indicated by a very specific megohmmeter pointer movement. What would be the characteristic of the pointer movement under these conditions?

Correct Answer: Option D — kicking slightly downscale as voltage is applied

Surface leakage current across moisture-laden or contaminated insulation creates a parallel resistive path. When test voltage is initially applied, capacitive charging causes a brief downward kick on the megohmmeter pointer before it stabilizes at a lower-than-normal resistance value.