A. A small, mains, step-down transformer is used to power a 12 V apparatus. The transformer's rating label is attached.
(i)Describe the constructional features of the transformer's core and explain why one winding is made of wire of a greater diameter than the other.
(ii)The rating `T130' on the transformer's label refers to a temperature. Explain the meaning of this rating.
(iii)If the primary and secondary winding resistances are 125 Ω and 0.7 Ω respectively, calculate the transformer's copper losses at full load.
(ii)If the total losses in the transformer amount to 4 kW for the conditions in (i) above, calculate the transformer's efficiency.© BrainMass Inc. brainmass.com October 10, 2019, 12:56 am ad1c9bdddf
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