A step-down transformer operates on a 2.5-kV line and supplies a load with 80 A. The ratio of the primary winding to the secondary winding is 20:1. Assuming 100 percent efficiency, determine the secondary voltage V2, the primary current I1, and the power output P2. 35.13 [I] V, = 0.13 kV I, = 20 1. 1, = 4.0 A P, = V,1, = 10 kW 20 V2 The last expression is correct only if it is assumed that the load is pure resistive, so that the power factor is unity.

A step-down transformer operates on a 2.5-kV line and supplies a load with 80 A. The ratio of the primary winding to the secondary winding is 20:1. Assuming 100 percent efficiency, determine the secondary voltage V2, the primary current I1, and the power output P2. 35.13 [I] V, = 0.13 kV I, = 20 1. 1, = 4.0 A P, = V,1, = 10 kW 20 V2 The last expression is correct only if it is assumed that the load is pure resistive, so that the power factor is unity.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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