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Energy and Power - Engineering

Q1:

A 75  load uses 2 W of power. The output voltage of the power supply is approximately

A 120 V

B 1.2 V

C 12 V

D 6 V

ANS:C - 12 V

V = √ (P*R),
V = √ (2*75),
V = √ (150),
V = 12.24.