The large figure shows the equipotential surfaces for a long corner-shaped condu

Question

The large figure shows the equipotential surfaces for a long corner-shaped conductor and a long round conductor, both inside a square metal pipe, in cross section. The enclosure is at ground potential (0 V), the corner is at +4000 V, and the cylinder is at -4000 V. The equipotential contour lines are 1 kV apart and labelled in kilovolts; the letters denote points on the lines. A cm scale is shown. Enter ALL correct statements, e.g., BCD. contour map The potential energy of a charge at f is zero. The electric field E at j points north. The electric field E at k points south. The electric field E at f is zero. The force on a positive charge at e points west. The force on a positive charge at c points west.

Explanation / Answer

A) True

B) False, a positive test charge will be attracted to the negative charge, thus it will point west.

C) True, a positive test charge would be repelled at k, along the electric field pointing downward

D) False, the voltage is still changing across ‘f’ even though it is instantaneously zero.

E) True, the positive test charge wants to move away from the high positive charge already there, it will move west.

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