Physics 2212 Homework 5 (due: March 29) 1.What is the electric potential at the point P? 2.What is the electric potential at the point P? 3.The potential at the center of a 4.0-cm-diameter copper sphere is 500 V, relative to V=0 V at infinity. How much excess charge is on the sphere? 4.Find potential energy for two configurations (a) and (b) shown in Fig. Three particles have the following charges 1231,5,10qCqCμμμ===−. Which configuration has the lower energy? +2 nC P -6 nC 5 cm 5 cm +2 nC 450450+1 nC P +2 nC 1 cm 1 cm 1 cm 10 cm 2q10 cm 3q1q(b) 10 cm 10 cm 10 cm 3q1q2q(a)
5.Point charge 11qCμ=is placed at the center of insulating uniformly charged sphere of radius 1Rm=and total charge 16QC= −. Find electric potential at distance r = 0.8 mfrom the center of the sphere, assuming that electric potential is 0 very far from the sphere. 6.Point charge qis placed at the center of insulating uniformly charged sphere of radius R=50 cmand total charge
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