1) When electrons are forced away from a/an ___ plate, work is done.

Question

Is "positive" a possible answer?

2) Any pointed or angular surface of an object must have a/an ___ concentration of charge to establish equilibrium.

Any ideas?

Answer 1

1, Postive plate is correct. It takes work to move an electron from where it wants to go.

2. Poorly worded. If a conducting surface is at equal potential, the charge density at the point is higher due to the smaller surface area, which leads to a much higher Electric field at the point.

So I think maybe "higher" is what the author wanted, but it is higher charge density (due to smaller surface area). Maybe "concentration" is being used to indicate charge density.