In an ideal single-phase full-bridge square-wave inverter supplied by Vdc, the load voltage switches between?

  • A0 and Vdc only
  • B-Vdc and +Vdc
  • C+2Vdc and -2Vdc
  • D0 and 2Vdc only
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Correct Answer: B. -Vdc and +Vdc
Explanation: With diagonal switch pairs conducting alternately, the full bridge applies +Vdc and -Vdc across the load.
Reference: Standard power electronics: single-phase inverter
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