Question: A balanced three-phase (240-mathrm{V}) source supplies a balanced three-phase load. If the line current (I_{mathrm{A}}) is measured to be (15 mathrm{~A}) and is in phase

A balanced three-phase $240-\mathrm{V}$ source supplies a balanced three-phase load. If the line current $I_{\mathrm{A}}$ is measured to be $15 \mathrm{~A}$ and is in phase with the line-to-line voltage, $V_{\mathrm{BC}}$, find the per-phase load impedance if the load is

(a) Y-connected,

(b) $\Delta$-connected.

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