Warming up on Gauss's Law

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1.

The dictionary defines flux as "a continuous moving on or passing by (as of a stream)." Electric flux is so named because of its similarity to this "common" definition. Please give an explanation of the similarities and differences.





2.

Estimate the total charge and surface charge density on the Earth, assuming that it is the only source of the Earth's electric field. At ground level, the Earth's field has a magnitude of about 150 N/C and points vertically downward.





3.

Which of the statements below is true for a perfect conductor?

a) It cannot feel an electrical force.

b) It cannot have electrical fields inside it.

c) It may contain many positive and negative charges

d) Both b) and c)

e) None the above.

Below is a space for your thoughts, including general comments about today's assignment. What was hard or confusing (or cool)? What would you like to spend extra time on in class? Do you see how this subject fits in with the others we have discussed?




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