PHYS 121 Lecture 5: Electric Potential Energy

• School: Simon Fraser University
• Department: Physics
• Course: PHYS 121
• Professor: Michael Chen

Document Summary

10:04 am: electric potential energy page 1, electric potential energy page 2, potential energy of point charges. A point charge q2 = -(cid:1005) c is fi(cid:454)ed at the o(cid:396)igi(cid:374) of a co-ordinate system as shown. Another point charge q1 = -(cid:1004). (cid:1006) c is i(cid:374)itiall(cid:455) located at poi(cid:374)t p, a dista(cid:374)ce d1 = 8. 1 cm from the origin along the x-axis. The charge q2 is now replaced by two charges q3 and q4 which each have a magnitude of -(cid:1004). 5 c, half of that of q2. The charges are located a distance a = 1. 9 cm from the origin along the y-axis as sho(cid:449)(cid:374). Define the potential energy to be zero at infinity. The charge q4 is now replaced by charge q5 which has the same magnitude, but opposite sign from q4 (i. e. , q5 = (cid:1004). 5 c). What is the (cid:374)e(cid:449) (cid:448)alue fo(cid:396) the pote(cid:374)tial e(cid:374)e(cid:396)g(cid:455) of the s(cid:455)ste(cid:373): electric potential energy page 3.