A. A 1 B 2 U. 3 4 E The figure above shows four very thin parallel planes of charge with equal separation between them. The charge density on plate 1 is 1 0. What is the Electric Field at point B? (in units of σ/ε0) -3.5 Correct response: 4.5+ 5.0% 0/€0 The charge density on plate 2 is 1 0. The charge density on plate 3 is -5 0. The charge density on plate 4 is -4 0. Your answers for the electric field must include the correct sign. We choose positive electric field along the positive x-direction.

Using your values for 7, calculate the average period Ibar (I) and its standard error. How does the error on the average period /bar (T) compares to the errors on the periods, I? What can you do to reduce the uncertainty on /bar (T)? What can you do to reduce the uncertainty on 7 ? Peried Trial T AT 4 141 $ 10.69 +α-0.5 2 10.60 + or -0.5 2 10.40 +α-0.5 10.43 +α-0.5 S 10.37 + or -0.5 Using your values for T, calculate the average period 7 and its standard error How does the error on the garage period compares to the errors on the periods, 7? What can you do to reduce the uncertainty on 7? What can you do to reduce the uncertainty on T7