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Ohm's Law - Technical MCQs

Q1:

The efficiency rating of a power supply is determined by internal power loss.

A True

B False

ANS:A - True

Efficiency = Pout/ Pin.
Where Pout is the output power,
The pin is power without loses = Pout + Plosses.

The amount of internal Power Loss or Plosses is the major factor in determining the value of efficiency of a power supply.