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- "question-highlight": "<em>Question</em> <em>1</em> (a) <em>Draw</em> <em>the</em> '<em>exact</em>' <em>equivalent</em> <em>circuit</em> <em>of</em> <em>a</em> <em>transformer</em> , <em>labelling</em> <em>and</em> <em>giving</em> <em>a</em> <em>short</em> <em>description</em> <em>of</em> <em>the</em> <em>function</em> <em>of</em> <em>each</em> model component. (8 marks) (b) Initially, assuming an ideal <em>transformer</em>, calculate the magnitude and phase of the load voltage and load current with respect to the supply voltage when a load of (5 + j4)2 is supplied from a single-phase 120V, 50Hz supply through the ideal <em>transformer</em> with a turns ratio, primary",
- "answerDisplay": "<p> </p>\n<p><strong>a)Exact Equivalent circuit of transformer:</strong></p>\n<p><img alt=\"Image result for exact equivalent circuit of transformer\" src=\"http://www.electricalunits.com/Image/Transformer/EquivalentCir.png\"></p>\n<p><span style=\"text-decoration: underline\"><em>Description:</em></span></p>\n<p>1) Primary(R1) and Secondary(R2) resistances-</p>\n<p>It represents the primary and secondary\nwinding resistances.</p>\n<p>2) Leakage reactance(X1 & X2)-</p>\n<p>All the flux from the primary does not link with secondary, so\nless voltage is induced on the secondary side. But this drop does\nnot cause any heating so labeled as reactance.</p>\n<p>3) core loss resistance(R<sub>0</sub>) and Magnetizing\nreactance(X<sub>0</sub>)-</p>\n<p>The no-load current (I1-I<sup>|</sup>2) is divided into,\npure reactance X<sub>0</sub> (taking magnetizing components\nI<sub>Ī¼</sub>) and non-induction resistance\nR<sub>0</sub> (taking working component I<sub>w</sub>) which\nare connected into parallel across the primary.</p>\n<p> ****R<sub>0</sub> = E<sub>1</sub> /\nI<sub>w</sub> and X<sub>0</sub> = E<sub>1</sub> /\nI<sub>Ī¼ </sub></p>\n<p>*****E<sub>1</sub> / E<sub>2</sub> =\nN<sub>1</sub> / N<sub>2</sub> </p>\n<p><img alt=\"al\ntract equivalent\nforcuit\nb)\nAs ideal trans former is considered so\nEIEN and E2 = Vā\n... Given = 120,soha No Nā=311\nthe Vzo\" src=\"https://media.cheggcdn.com/media/2f8/2f889ac9-1991-4a8f-9484-960a5250bf1f/phpggIAm2.png\"></p>\n",
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