The irregularly shaped area of charge in FIGURE Q23.7 has surface charge density hi. Each dimension (x and y) of the area is reduced by a factor of 3.163.

a. What is the ratio η_f/η_i, where η_f is the final surface charge density?b. An electron is very far from the area. What is the ratio F_f/F_i of the electric force on the electron after the area is reduced to the force before the area was reduced?

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+ to + FIGURE Q23.7