In the figure, the voltages are ๐‘ฃ1(๐‘ก) = 100cos(๐œ”๐‘ก), ๐‘ฃ2(๐‘ก) = 100cos

Q. In the figure, the voltages are ๐‘ฃ1(๐‘ก) = 100cos(๐œ”๐‘ก), ๐‘ฃ2(๐‘ก) = 100cos(๐œ”๐‘ก + ๐œ‹/18) and ๐‘ฃ3(๐‘ก) = 100cos(๐œ”๐‘ก + ๐œ‹/36). The circuit is in sinusoidal steady state, and ๐‘… << ๐œ”๐ฟ. ๐‘ƒ1, ๐‘ƒ2 and ๐‘ƒ3 are the average power outputs. Which one of the following statements is true?

(A) ๐‘ƒ1 = ๐‘ƒ2 = ๐‘ƒ3 = 0                                   (B) ๐‘ƒ1 < 0, ๐‘ƒ2 > 0, ๐‘ƒ3 > 0

(C) ๐‘ƒ1 < 0, ๐‘ƒ2 > 0, ๐‘ƒ3 < 0ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย  (D) ๐‘ƒ1 > 0, ๐‘ƒ2 < 0, ๐‘ƒ3 > 0

Ans: ๐‘ƒ1 < 0, ๐‘ƒ2 > 0, ๐‘ƒ3 < 0ย ย 

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