The document requests help with questions 8a and 11 from an electric field diagram. 8a asks if there are any isolated charges and if so, their location and sign. The response identifies isolated negative charges in region II based on the direction of the electric field lines. 11 shows a diagram and asks if it represents a conductor or insulator. The response states it must be a conductor because electric field lines cannot penetrate a conductor in electrostatic equilibrium and the lines do not penetrate the object in the diagram.

1. please just check my answers and help me out with 8a and 11. thank you!
8. Consider Figure 1 that shows an electric field extending over three regions, labeled I, II, and
III and answer the following questions. 8.a. Are there any isolated charges? If so, in what region
and what are their signs?? Sb. Where is the field strongest? 80 where is it weakest?) 8.d. Where
is the field the most uniform? hele on 9. Choose each correct statement regarding electric field
lines. a. electric field lines are closer together when the electric field is weaker 6 the electric field
lines for a uniform field are parallel and equally spaced electric field lines can never cross more
electric field lines will leave a 5.0 nC charge than a 2.0nC charge e. electric field lines start at
negative charges and end on positive charges The direction of the electric field at any point in
space is tangent to the electric field line passing through that point in space 10. Choose each
correct statement regarding conductors in static equilibrium @ a conductor placed in an electric
field will be polarized b. charges in a conductor are not free to move, they are locked into their
position c. the electric field inside of a charged spherical conductor is zero d. the electric field
outside of a charged spherical conductor is zero charges are free to move through a conductor f.
the clectric filed lincs just outside of a conductor are parallcl to the surfacc excess charges will
always sit on the surface of a conductor 11. Consider Figure 2, is the object shown a conductor
or insulator? Explain why??7? Help Hhus ona a
Solution
8a) Yes. In region II there are Isolated negative charges.
because, electric field lines always start at positive charge and end at negative charge.
In the diagram elctric field lines are edning in region II. so, there must be isolated negative
charge.
11) That must be a conductor.
Because, in electrostatic equilibrium inside a conductor electic field is zero. so, electric field
lines can not penatrate through a conductor.