For the cylindrical capacitor of Problem 1.6c, evaluate the variational upper bound of Problem 1.17b with the naive trial function, 1() = (b )/(b

For the cylindrical capacitor of Problem 1.6c, evaluate the variational upper bound of Problem 1.17b with the naive trial function, ψ1(ρ) = (b – ρ)/(b – a). Compare the variational result with the exact result for b/a = 1.5, 2, 3. Explain the trend of your results in terms of the functional form of Ф. An improved trial function is treated by Collin.