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Question
In an a.c. circuit, with phase voltage V and current I, the power dissipated is ______.
Options
V I
`"V I"//sqrt2`
depends on the phase angle between V and I
V I / 2
MCQ
Fill in the Blanks
Solution
In an a.c. circuit, with phase voltage V and current I, the power dissipated is depends on the phase angle between V and I.
Explanation:
Since Pav = Ev Iv cos ϕ, the power dissipated depends on the phase angle between V and I.
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Representation of AC Current and Voltage by Rotating Vectors - Phasors
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