E7D10 (C)
Why is a switching type power supply less expensive and lighter than an equivalent linear power supply?
A. The inverter design does not require an output filter circuit
B. The control circuitry uses less current, therefore smaller heat sinks are required
C. The high frequency inverter design uses much smaller transformers and filter components for an equivalent power output
D. It recovers power from the unused portion of the AC cycle, thus using fewer components
