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← ScienceWhich risk increases when electrostatic spray deposition uses excessive voltage?
A)Increased rate of solvent evaporation
B)Increased airborne ionic particle repulsion
C)Dielectric breakdown of air occurs✓
D)Increased agglomeration before target contact
💡 Explanation
Increased voltage causes a stronger electric field and increases the risk of dielectric breakdown, releasing a spark, because the electric field exceeds the dielectric strength; therefore, electrical arcing is likely rather than controlled ionic deposition.
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