Question

A square metal box has sides of length 10.0 cm and a net charge of +10 MC. Which of the following statement is true?

Answer 1

@aliqanber


@Mehek14 , @ganeshie8


@johnweldon1993 , @agent0smith

Answer 2

Seems to me that F might be the answer. Pretty sure all is false except maybe c?
Charge will distributed close to the surface of the box.

Answer 3

Yeah I kinda agree that they're all false.

Answer 4

Why is not B?

Answer 5

electric field in a conductor is zero

Answer 6

since electrons in a conductor are free to move around. If an electric field is applied, these electrons move around until the resultant electric field becomes zero.

Answer 7

But how can it have a net charge of +10mc and a electric field of zero?

Answer 8

the charge is distributed on the surface of the box. Inside the box electrons cancel out the field.

Answer 9

I know I said this is my last question; however, there is this other question that I worked it out. Howvever, I am not sure that my answer is correct. If you are getting tired of me I can show to you what i did.

Answer 10

But how can you have charge if it cancels out. Is that just outside?

Answer 11

ohh ok I see

Answer 12

So is F for this one?

Answer 13

yup, pretty sure.

Answer 14

Alright thanks :D

Answer 15

Btw c cannot be correct either right? It does not matter that is in the corners correct?

Answer 16

And why is e false?

Answer 17

e is false because the electric field inside is zero. You don't need to do any work to get from the surface to a point inside. Assuming that the distribution of the charge and electrons don't change.

Answer 18

might be helpful: http://hyperphysics.phy-astr.gsu.edu/hbase/electric/potsph.html