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A capacitor is connected in parallel with a coil having L = 5.52 mH and R = 10 Ω, to a 100-V, 50-Hz supply. Calculate the value of the capacitance for which the current taken from the supply is in phase with voltage. |
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Answer» At resonance, L/C = Z2 or C = L/Z2 XL = 2π × 50 × 5.52 × 10−3 = 1.734 Ω, Z2 = 102 + 1.7342 , Z = 10.1Ω C = 5.52 × 10−3/10.1 = 54.6 μF |
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