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Unformatted text preview: rk line shown. The ﬁeld
at the diamond could point in which of the following directions?
A) left B) out of the screen C) up
4. Which of the following is the total charge of a square with surface
charge density σ and dimensions as shown?
σ dx dy
−1 −1 −1 −1 −1 −1 −1 (1,1)
y (-1,-1) x 5. Which of the following shows the ﬁeld lines of an inﬁnite line with negative charge
smeared evenly over it?
A) B) C) D) 6. Which animal appeared in a square on the homework due this week?
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