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5.X marks the spot.What is the net electric field at pointX?"1-√2#"1-√2#A.kqa22ˆı+kqa22ˆB.kqa2"1 +√22#ˆı+kqa2"1 +√22#ˆC.kqa2"√22-1#ˆı+kqa2"√22-1#ˆD. zero6.Charge on X.Which of the following statements is/areTRUEif another point charge-2qis placed at point X?A – 3
First Long ExamFirst Semester, AY 2015–2016Physics 727.Mutual repulsion.Two electrons exert a force with magnitudeFon each other. What willbe the new magnitude of this mutual force if their separation distance is halved?For the next three items, consider two infinite charged sheetsperpendicular to each other whose cross-sections are asshown. The sheet along thex-axis has a uniform charge den-sity+σwhile the sheet along they-axis has-σ.8.Ilocos.What is the net electric field in region I?9.Central Luzon.What is the net electric field in region III?A.σ20(ˆı+ ˆ)B.σ20(ˆı-ˆ)C.σ20(-ˆı+ ˆ)D.σ20(-ˆı-ˆ)10.Before Deadpoole.If a dipole withp=p(ˆı+ ˆ),p >0, is placed in region II, which ofthe following will happen to the dipole?11.Bingbong.Which of the following Gaussian surfaces is themost usefulin calculating theelectric field due to this cylinder?
First Long ExamFirst Semester, AY 2015–2016Physics 7212.Inside.If the cylinder has a non-uniform volume charge densityρ(r) =ρ1r2,ρ1>0, whatis the electric field in the regionr < a?0r40r20r20r13.Out.If the cylinder has a uniform volume charge densityρ=ρ2,ρ2>0, what is theelectric field in the regionr > a?A.ρ20rB.ρ220a2rC.ρ230a3r2D.ρ240a4r3
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Physics, Electric charge, Ω, College of Science, C. Eπ