4.Libert´e.What is the electric flux through thespherical Gaussian surface with radiusr < Rlocatedinsidethe conducting sphere?A.-Qr30R3B.-2Qr30R3C.-2Q0D. zeroE.Solution:conductor5.´Egalit´e.What is themagnitudeof the electric field on this Gaussian surface?6.Fraternit´e.What is the net charge on theoutersurface of the rectangular conductor?7.May potential!The potential at a point P due to a unit positive charge is found to beV0. Ifthe distance between the charge and the point is tripled, what is the new potential at pointP?A – 4
Final ExamFirst Semester, AY 2015–2016Physics 728.Sore Eyes.Consider the following electric configuration with the equipotential (dashedlines) and electric field lines (solid lines) shown.Which of the labelled points has thehighest electric field magnitude?9.Tor-Capa ba? Tor na!What is the effective capacitance of the circuit?10.Dark Energy.How much electric energy is stored in each of the capacitors?
Final ExamFirst Semester, AY 2015–2016Physics 72A.CV24B.CV22C.CV2D.2CV2E.Solution:1/2CV211.Darkelectric.If a dielectric withκ= 2is inserted in all the capacitors, what is the neweffective capacitance of the circuit?12.Thou Shall DRIFT.What is the magnitude of the drift velocity of the electrons in a currentcarrying wire with current densityJ= 8.0×106A/m2and free electron densityn=5.0×1028m-3. (The charge of an electron is-e.)A.1.6×10-19m/sB.1.0×10-3m/sC.2.5×1025m/sD.5.0×1025m/sE.Solution:v=Jn|q|13.Step Current.Consider the circuit shown. What is the currentpassing through the8-Ωresistor?
Final ExamFirst Semester, AY 2015–2016Physics 72Solution:A one Step problem to solve Current. :PI=εR+rFor the next two items, consider the circuit shown. Each re-sistor has the same resistanceR= 1.0 Ω.
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- Physics, Magnetic Field