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The circuit arrangement given in the fig...

The circuit arrangement given in the figure shows that when an ac. passes through the coil A, the current starts flowing in the coil B. State the underlying principle involved.

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MODERN PUBLICATION-ALTERNATING CURRENTS-EXERCISE
  1. Why 200 V a.c. more dangerous than 220 V d.c.?

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  2. Why is the use of A.C. voltage preferred over D.C. voltage? Give two r...

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  3. The circuit arrangement given in the figure shows that when an ac. pas...

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  4. The circuit arrangement given in the figure shows that when an ac. pas...

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  5. In India domestic power supply is at 220 V, 50Hz. While in USA it is 1...

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

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  7. How are the energy losses reducedin a transformer ?

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

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  9. Why the core of a transformer made of a magnetic material of high perm...

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  10. Why the core of a transformer made of a magnetic material of high perm...

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  11. A step up transformer converts a low input voltage into a high output ...

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  12. Describe the use of transformer for long distance transmission of a.c.

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  13. A transformer of 100% efficiency has 500 turns in the primary and 10,0...

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  14. Can a trasnformer be helpful in reducing the cost of transmission of e...

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  15. What is the fucntion of a choke coil in fluorescent tube?

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  16. Show that an ideal inductor does not dissipate power in an ac circuit.

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  17. Answer the following questions: Why is choke coil needed in the use of...

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  18. Why is choke preferred to rheostat in controlling a.c. supply.

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  19. Which of the best method of reducing current in an a.c. circuit and wh...

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  20. Why choke coil cannot be used in d.c.?

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