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In an A.C. circuit inductance, capacitance and
\( \mathrm{P} \) resistance are connected. If the effective voltage

W across inductance is \( \mathrm{V}_{\mathrm{L}} \), across capacitance is \( \mathrm{V}_{\mathrm{c}} \) and across resistance is \( V_{R} \), then the total effective value of voltage is :
(1) \( \mathrm{V}_{\mathrm{R}}+\mathrm{V}_{\mathrm{L}}+\mathrm{V}_{\mathrm{c}} \)
(2) \( V_{R}+V_{L}-V_{c} \)
(3) \( \sqrt{V_{R}^{2}+\left(V_{L}-V_{C}\right)^{2}} \)
(4) \( \sqrt{V_{R}^{2}-\left(V_{L}-V_{C}\right)^{2}} \)
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