Electric input power

Solve problems related to electric power:

a) U = 120 V, I = 0.5 A, P =?
b) P = 200 W, U = 230 V, I =?
c) I = 5 A, P = 2200W, U =?

Result

P1 =  60 W
I2 =  0.87 A
U3 =  440 V

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