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Unformatted text preview: t36 . 87 ◦ ) V (b) P inst ( t ) = i in ( t ) v L ( t ) = 100 cos(30 t ) cos(30 t36 . 87 ◦ ) W P average = V m I m 2 cos( θ vθ i ) = 50 cos 36 . 87 ◦ = 40 W Problem 10 (a) I s = 50 ±90 ◦ 6 + j 12j 4 = 5 ±143 . 13 ◦ ( magnitude = 5) (b) P average = V eff I eff cos( θ vθ i ) = 5 × 50 cos(53 . 13 ◦ ) = 150 W 3 (c) P average = R  I s  2 = 6 × 25 = 150 W ( same as part ( b )) (d) I s = 50 ±90 ◦ 30 + j 50j 10 = 1 ±143 . 13 ◦ ( magnitude = 1) P average = V eff I eff cos( θ vθ i ) = 1 × 50 cos(53 . 13 ◦ ) = 30 W 4...
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 Spring '08
 Chunghorng,R
 Harshad number, 150 W, 30 W, 40 W, 30 9 3 1000 W, 30 9 4 250 W

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