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← ScienceWhen a high-voltage current passes through sulfur hexafluoride gas at near-atmospheric pressure, which outcome results from changes in molecular behavior?
A)Arc quenching and circuit interruption✓
B)Increased electrical conductivity of sulfur
C)Production of ozone near electrodes
D)Formation of nitrogen oxides in gas
💡 Explanation
Arc quenching occurs because electron attachment to SF6 forms negative ions, resulting in rapid electron density reduction. This process, known as dissociative attachment, leads to arc extinguishing, therefore preventing sustained conduction rather than enhancing conductivity or producing other gases.
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