Question: Two ac voltage sources are connected in series with a resistor R = 25 . One source is given by V1 = (5.0 V) cos

Two ac voltage sources are connected in series with a resistor R = 25 Ω. One source is given by V1 = (5.0 V) cos (ωt – a), and the other source is V2 = (5.0 V) cos (ωt + a), with a = π/6.

(a) Find the current in R using a trigonometric identity for the sum of two cosines.

(b) Use phasor diagrams to find the current in R.

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a 1 V V 1 V 2 using cos cos 2 cos 12 cos 12 90 so V V 1 2 V 2 2 I V R 2 I V R The phase ... View full answer

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