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← ScienceWhich risk increases when a step-up transformer's insulation fails in a high humidity environment?
A)Increased hysteresis core losses occur
B)Capacitive coupling causes signal distortion
C)Dielectric breakdown lowers impedance✓
D)Eddy current losses substantially decrease
💡 Explanation
Dielectric breakdown increases because the *increased electric field stress* due to insulation compromise, coupled with moisture ingress, exceeds the dielectric strength; therefore impedance is lowered rather than something else, because current flow cannot be impeded.
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