(4%) Problem 2: The electric field in a certain region is given by the equation E=(ax" - b)i, where a = 6 N/(C.m"), b = 2 N/C and n = 6. A Calculate the electric potential difference (AV = V2 - V1), in volts, between the points x, = 1.85 m and x1 = 0.55 m, i.e., AV = V(x2) - V(x1).(4%) Problem 3: Consider two points in an electric eld. The potential at point 1, V1, is 35 V. The potential at point 2, V2, is 157V. A proton is moved from point 1 to point 2. B: A 33% Part (a) Write an equation for the change of electric potential energy A Uof the proton, in terms of the symbols given and the charge of the proton e. Grade Summary A U: i Deductions 0% Potena] 100% Submissions Attempts remaining: E @ per attempt) detailed View Submit Hint _ 1 give up! Hints: 0% deductionper hint, Hints remaining: 1 Feedback: 0% deduction per feedback a A 33% Part (b) Solve for the numerical value of the change of the electric potential energy in electron volts (eV). a A 33% Part (c) How much work is done by the electric force during the motion of the proton in I? (4%) Problem 6: The voltage across a membrane forming a cell wall is 81 mV and the membrane is 8. 75 nm thick. What is the electric field strength in the cell wall, in volts per meter