(A) A cube with 1.40 m edges is oriented as shown in the figure in a region of u
ID: 2132423 • Letter: #
Question
(A) A cube with 1.40 m edges is oriented as shown in the figure in a region of uniform electric field. Find the electric flux through the right face if the electric field, in newtons per coulomb ( N/C), is given by 4.40i. (N*m(shift-6)2/C)
(B) Find the electric flux through the right face if the electric field, in newtons per coulomb ( N/C), is given by -4.20j.
(C) Find the electric flux through the right face if the electric field, in newtons per coulomb ( N/C), is given by -2.60i + 3.40k.
(D) What is the total flux through the cube for each of these fields?
Explanation / Answer
the right side has an A vector = 1.4^2 = 1.96 j
a) so flux= E*A = 4.4i * 1.4^2 j = 0 since i and j are orthogonal
b) flux = E*A = -4.2 j * 1.4^2 j = -4*1.4^2=-8.232
c) flux = E*A (-2.6 i +3.4 k) * 1.4^2 j = 0 since j is orthogonal to i and k
d) since E is constant flux in = flux out so net flux=0 for all three
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