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The charge per unit length on a long, straight filament is -87.0 µC/m.

(a) Find the electric field 10.0 cm from the filament. Distances are measured perpendicular to the length of the filament. (Take radially inward toward the filament as the positive direction.)
MN/C

(b) Find the electric field 26.0 cm from the filament.
MN/C

(c) Find the electric field 140 cm from the filament.
MN/C

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1 answer
  1. E=k2λ/r
    E=9•10⁹•2•87•10⁻⁶/2•0.1 =...
    E=9•10⁹•2•87•10⁻⁶/2•0.26 =...
    E=9•10⁹•2•87•10⁻⁶/2•1.4 =...

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