Which requires zero work to move a positive charge from P to

Which requires zero work, to move a positive charge from P to points A, B, C or D ? All points are the same distance from P. P rightarrow A P rightarrow B P rightarrow C P rightarrow D all require the same amount of work A conductor is distinguished from an insulator with the same number of atoms by the number of: nearly free atoms electrons nearly free electrons protons molecules The units of the electric field are: N middot C^2 C/N N N/C C/m^2

Solution

20) c) P ---> C

In path C, you are moving in a direction perpendicular to the field lines. This means no work required

21 ) c) nearly free electrons

22) D) N/C

units for electric field are newtons per coulomb (N/C) or volts per metre (V/m)