Let D D be the annular region 2 2 , a
Question:
Let D be the annular region
−π2≤θ≤π2,a≤r≤b
where b>a>0. Assume that D has a uniform charge distribution of ρ coulombs per square meter. Let F be the net force on a charged particle of charge Q coulombs located at the origin (by symmetry, F acts along the x-axis).
(a) Argue as in Exercise 59 to show that
F=kρQ∫π/2θ=−π/2∫br=a(cosθr2)rdrdθ
(b) Compute F.
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As in Exercise 59 let R be a small polar rectangle of size Arx A0 located ...View the full answer
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