Which risk increases sharply when exceeding the Volt-Ampere (VA) rating of a backup power inverter circuit?

💡 Explanation

Exceeding the VA rating causes increased resistive heating in MOSFETs because higher current draw overwhelms the thermal management capacity and temperature rises exponentially, therefore risking thermal runaway, rather than simple EMI increases from transient switching or core saturation which impact efficiency.

• Which risk increases when a high-frequency signal exceeds the Nyquist rate during data acquisition?
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• Which outcome occurs when variable-frequency drive (VFD) control fails on a centrifugal pump maintaining constant chilled-water-supply temperature in a large HVAC system?
• Which outcome happens when a pre-stressed concrete beam experiences excessive shear stress near support?
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• Which outcome occurs when mineral oil is used in an air conditioning system designed for R-134a refrigerant?