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Nightwatchman
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Homework Statement
What is the the efficiency of a transformer with 13w of primary power.
120Vp, Np unknow
12Vs, 90Np
Transformer efficiency is a measure of how well a transformer converts electrical energy from one circuit to another. It is expressed as a percentage and is calculated by dividing the output power by the input power.
Transformer efficiency is important because it affects the performance and cost of a transformer. A higher efficiency means less energy is wasted and therefore the transformer is more cost-effective and environmentally friendly.
The primary factors that affect transformer efficiency are the design and materials used in the transformer, such as the core material, winding resistance, and insulation. The load on the transformer and the temperature also have an impact on its efficiency.
Transformer efficiency is measured by conducting a no-load test and a full-load test. The no-load test measures the losses when the transformer is not supplying any load, and the full-load test measures the losses when the transformer is supplying its rated load. The efficiency is then calculated using the results of these tests.
A typical efficiency for a transformer can range from 85% to 99%. The exact efficiency will depend on the design, materials, and load of the transformer. Generally, larger transformers tend to have higher efficiencies than smaller ones.