Basic Physics II Evidences - DrJJ - UiTM

TOPIC LEARNING OUTCOMES REMARKS HOUR2.1 Electric Potential& EquipotentialSurfacesa) Define electric potential and an equipotential surface.b) Sketch equipotential lines for an isolated positive charge, for anisolated negative charge, for a pair of positive-positive charge, for apair of positive-negative charge and for a parallel-plate capacitorc) Write the strength and numerically obtain the potential for anisolated charge.d) Write the strength and numerically obtain the potential to the right,to the left and at midpoints for a pair of positive-positive charge andfor a pair of positive-negative charge.e) Write, explain and numerically obtain the field strength in the areabetween a uniformly-charged parallel-plate capacitors.f) Explain, qualitatively, the electric potential energy gain or lostwhen a positive point charge is moved in an electric field.‣ Electric potential as the amount of workdone in moving a point charge from faraway (infinity) to some point A in anelectric field (compare to moving a mass ina gravitational field).WBAV∞−VA = −VA=q0.‣ Equipotential surface as a surface where Vis a constant.‣ For a point charge,q0EqV = r = k r =2q rVE =‣ d0qkr‣ Explain the work energy relationW = U − U = −qVAB B A 02Physics Lesson Outcomes-Electricity & Magnetismhttp://drjj.uitm.edu.my; HP:+60-19-355-1621Page 3 of 12Prepared by Assoc. Prof. Dr. Jaafar Jantan aka Dr. JJEmail: jjnita@salam.uitm.edu.my; drjjlanita@hotmail.com