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Give the principle of a transformer, con...

Give the principle of a transformer, construction of a stepdown transformer. Give any two energy losses of a transformer.

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PUNJAB BOARD PREVIOUS YEAR PAPERS-ELECTRICAL DEVICES-EXERSICE
  1. Draw a labelled diagram of a.c.generator.

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

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

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  4. State the principle of electric generator

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

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

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

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

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

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

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

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

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

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

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

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

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

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  18. Name the various lossed in a transformer.

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  19. Explain with the help of labelled diagram, the construction, working a...

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  20. Establish relation between voltage and current in primary and secondar...

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