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Alternating Current Test - 11

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  • Question 1
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    In an a.c. circuit, the voltage applied is E = E0 sin ωt. The resulting current in the circuit is I = I0 sin (ωt - π/2). The power consumption in the circuit will be. 

    Solution

    Here, ϕ = π/2
    ∴ Power factor, cosϕ = cos π/2 = 0
    The power consumed in the circuit,
    P = EvIv cosϕ = EvIv × 0 = 0

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