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Power ElectronicsPWM Control

Pulse-width modulation in a DC converter controls average output mainly by varying the?

  • ASwitch duty ratio
  • BSemiconductor layer count
  • CSupply polarity every cycle only
  • DLoad resistance mechanically
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Correct Answer: A. Switch duty ratio
Explanation: PWM varies the fraction of each switching period for which the controlled switch is ON.
Reference: Standard power electronics: pwm control
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