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What are the factors which reduce the efficiency of a transformer ?

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PUNJAB BOARD PREVIOUS YEAR PAPERS-ELECTRICAL DEVICES-EXERSICE
  1. How transformer is helpful in transferring electric power from generat...

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  2. Ratio of number of turns in primary and secondary coil of 440V-22000V ...

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  3. What are the factors which reduce the efficiency of a transformer ?

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  4. How are the energy losses reducedin a transformer ?

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  5. Draw a labelled diagram of a.c.generator.

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  6. Explain principle and theory of Transformer with the help of diagram.

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  7. Draw the labelled diagram of an a.c.generatpr.Write the principle on w...

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  8. State the principle of electric generator

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  9. Explain principle and theory of Transformer with the help of diagram.

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  10. Draw the labelled diagram of an a.c.generatpr.Write the principle on w...

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  11. Give the principle, construction and labelled diagram of AC generator.

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  12. Give the principle of a transformer, construction of a stepdown transf...

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  13. Give the principle of a transformer, construction of a stepdown transf...

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  14. Why soft iron is used in making the core of a transformer ?

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  15. Draw the labelled diagram of an a.c.generatpr.Write the principle on w...

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  16. Explain principal,construction and working of D.C.generator.

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  17. Explain principle and theory of Transformer with the help of diagram.

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  18. With the help of labelled diagram, describe the principle,construction...

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  19. Explain principal,construction and working of D.C.generator.

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  20. What are copper loss, iron loss and hysteresis loss in transformer?

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