Which consequence results when variational wave functions poorly approximate true eigenfunctions?

💡 Explanation

When trial wave functions poorly represent eigenfunctions, the energy calculation from the variational method can become unstable, because error in the functions causes the minimization to find false minima rather than the real ground state; therefore option A, rather than improvements or accuracy.

• Which mechanism causes increased eddy current losses when power transformer operates at elevated frequency without capacitance compensation?
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• Which outcome limits a Stirling engine reaching predicted efficiency?
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• Which distortion occurs to spacetime when approaching singularities?
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