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PHYS 2153: Engineering Physics III - WS31: Electric Fields: SP22.01 Students Name: Date: Objectives: e Apply Coulomb’s law to find electric fields in a vector form. e Exercise the directional unit vector ¢ in Coulomb’s law. Sample Problem 22.01 Net electric field due to three charged 7 particles, page 634 The figure here shows three particles with charges g, % @ = +2Q, qo = —2Q, and q3 = —4Q, each a distance d from the origin. = _ da ad 0° 1) What is the electric field, E, due to particle 1 at the origin, in a vector form? 2) What is the electric field, Ey due to particle 2 at the origin, in a vector form? 3) What is the electric field, Es due to particle 3 at the origin, in a vector form? 4) What net electric field is produced at the origin? [Challenge] For Q =e and d = rg = 5.292 x 10-!! m, estimate the acceleration of an electron at the origin. (5 points) 
