707_Physics ProblemsTechnical Physics

707_Physics - Chapter 24 P24.66 The electric field throughout the region is directed along x therefore E will be perpendicular to dA over the four

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Chapter 24 47 P24.66 The electric field throughout the region is directed along x ; therefore, E will be perpendicular to dA over the four faces of the surface which are perpendicular to the yz plane, and E will be parallel to dA over the two faces which are parallel to the yz plane. Therefore, Φ Ex xa x xac EA E A a a b a c a b a b c a c =− + =− + + + + = + == + ej e j e j af 32 2 2 2 2 . Substituting the given values for a , b , and c , we find Φ E =⋅ 0269 . N m C 2 . Q E =∈ = × = 0 12 238 10 238 Φ .. C p C FIG. P24.66 P24.67 ⋅= = z dEr q 4 2 0 π in (a) For rR > , qA rr d r AR R in z 22 0 5 44 5 ππ and E AR r = 5 0 2 5 . (b) For < , d r Ar r in z 0 5 4 4 5 and E Ar = 3 0 5 . P24.68 The total flux through a surface enclosing the charge Q is Q 0 . The flux through the disk is Φ disk z d where the integration covers the area of the disk. We must evaluate this integral and set it equal to 1 4 0 Q to find how b and R are related. In the figure, take d A to be the area of an annular ring of radius
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .

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