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Physics
Alternating Current
Calculate the average dissipated in a resistive circuit by a voltage of V = 5 Cos wt and resistance of 25\(\Omega \).
0.5 W
5 W
0.2 W
25 W
I = V/R = 5 Cos wt/ 25 = 0.2 Cos wt
<P> = I2R/2