Power Electronics
A single phase full bridge inverter can operate in load commutation mode in case load consists of

 RLC critically damped.
 RLC overdamped.
  RLC underdamped.
 RL.

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Power Electronics
Delay time is defined by the interval when

 gate current increases from 90 % to 100 % of its final value.
  all of these.
 anode current reaches 10 % from forward leakage current.
 anode voltage drops from 100 % to 90 % of its actual value.

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