Power transformers typically exhibit efficiencies falling within the range of________________?
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Answer: B. 98 per cent
Explanation
Large power transformers are engineered with high-grade silicon steel and thick copper conductors. These optimized designs minimize all internal magnetic and resistive losses during continuous operation. Consequently, large power transformers achieve exceptionally high operating efficiencies approaching ninety-eight percent. Transformer efficiency is calculated as the ratio of useful output power to total input power. Losses in large power units represent a tiny fraction of their massive multi-megavolt-ampere capacity. Advanced manufacturing techniques ensure minimal magnetic leakage and low winding resistance values.
Electrical transmission grids rely on highly efficient transformers to prevent massive energy waste nationwide. Utility operators factor transformer efficiency ratings into long-term financial and environmental cost analyses. Even a one percent efficiency improvement saves millions of kilowatt-hours annually in large utility networks. One hundred percent efficiency violates the fundamental laws of physics due to unavoidable losses. Fifty percent efficiency represents poor design characteristics typical of severely overloaded or flawed devices. Twenty-five percent efficiency indicates extreme equipment failure or gross misapplication in power circuits.
- Subject
- Engineering
- Category
- Electrical Engineering
- Topic
- —
- Difficulty
- medium
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