698_Physics ProblemsTechnical Physics

698_Physics ProblemsTechnical Physics - 38 Gausss Law...

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38 Gauss’s Law P24.35 (a) E k r e == ×⋅ × 2 2 8 99 10 2 00 10 7 00 0100 96 λ .. . . Nm C C m m 22 ej e j E = 51 4 ., kN C radially outward (b) Φ E EA E r ° cos cos θπ 20 A bg Φ E = 514 10 2 0100 00200 100 646 4 . . NC m m 2 af π P24.36 (a) ρ × Q a 4 3 3 6 4 3 3 2 570 10 00400 213 10 . . . Cm 3 qr in C n C = F H G I K J F H G I K J = −− ρπ 4 3 4 3 0 020 0 7 13 10 713 32 3 7 . (b) in C = F H G I K J F H G I K J = µ 4 3 4 3 570 3 . P24.37 E = = × = σ 2 900 10 2 8 85 10 508 0 6 12 . . CNm kN C , upward 2 P24.38 Note that the electric field in each case is directed radially inward, toward the filament. (a) E k r e × = 2 2 8 99 10 90 0 10 16 2 . . m MN C e j (b) E k r e × = 2 2 8 99 10 90 0 10 0200 809 . . m MN C e j (c) E k r e × = 2 2 8 99 10 90 0 10 162 . . m MN C e j Section 24.4 Conductors in Electrostatic Equilibrium P24.39 EdA E rl q z 2 0 in E ql rr = = in 00
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