By Terry Bartelt
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In this animated activity, learners see that changing the resistance value of the load in the secondary of a transformer causes current to vary in the primary.
Students read about the concept of true power and view examples of how it is dissipated as heat is provided.
Learners view the waveforms and voltages of an Edison Three-Wire System and read a description of the polarities across the secondary of the center-tap transformer. This transformer supplies power to residential homes.