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← ScienceWhich risk increases when sustained high current passes through solid ionic conductors?
A)Dendrite formation causes internal shorting✓
B)Increased grain boundary electron tunneling
C)Increased thermal phonon propagation velocity
D)Reduced redox reaction polarization
💡 Explanation
Dendrite formation increases dramatically at high currents because electromigration drives metal ions across the electrolyte via ionic conduction; therefore, internal shorting becomes likelier rather than altered electron/phonon transport or polarization effects.
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