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Question

The phase difference between the alternating current and voltage represented by the following equation I=I0 sinωt, E=E0cos(ωt+π3), will be

A
π6
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B
π3
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C
π2
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D
5π6
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Solution

The correct option is D 5π6
To solve such question, we need to convert the two functions into either sin or cos for comparison.

I=I0sinωt

E=E0cos(ωt+π3)

E=E0sin[π2+(ωt+π3)]

[sin(90+θ)=cos θ]

E=E0sin (ωt+5π6)

Clearly, the phase difference, Δϕ=5π6

Hence, option (D) is the correct answer.

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