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Which mechanism changes when applying high voltage across solid ionic electrolyte in an electrochemical cell?

A)Ionic conductivity due to vacancy migration
B)Electronic conductivity due to band overlap
C)Thermal conductivity due to phonon scattering
D)Magnetic susceptibility due to spin alignment

💡 Explanation

Applying voltage to an ionic electrolyte drives ion migration via vacancies; the enhanced E-field promotes hopping between lattice sites because it lowers activation energy barriers. Hence ionic conductivity undergoes changes, rather than electronic conductivity, thermal conductivity, or magnetic susceptibility, since these effects depend on other system properties.

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