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MAGNETISM- ASSIGNMENT


MAGNETISM- ASSIGNMENT



  1. Can a magnet have alone north pole? Can it have a south pole?
  2. Which material is used to make magnet?
  3. What is magnet?
  4. Why copper wire is not used for the fuse?
  5. How many poles are there in a magnet?
  6. State Fleming’s left hand rule. What are the factors on which the strength of magnetic field produced by a current carrying solenoid depends? Draw a simple diagram of solenoid and also explain its definition
  7. An iron needle is attracted to the ends of a bar magnet but not to the middle region of the magnet. Is the material making up the ends of a bar magnet is different from that of the material in the middle?
  8. How the intensity of magnetic field vary with the electric current?
  9. State right hand thumb rule?
  10. Differentiate between bar magnet and electromagnet?
  11. Name two materials used for electromagnet?
  12. Why soft iron is not used for making electromagnet?
  13. Explain Fleming left hand rule?
  14. How can you prove that the magnetic lines of forces are circular in nature?
  15. On what factors the magnitude of magnetic field produced by a straight current carrying wire depends?
  16. What do you mean by “magnetic effect of current”?
  17. What is role of magnetism in medicines?
  18. What are magnetic field lines? How is the direction of a magnetic field lines at a point determined? List any three properties of Magnetic lines of force.
  19. What is galvanometer?
  20. Draw a sketch to show the magnetic lines of force due to bar magnet?
  21. Why two magnetic lines of forces never intersect?
  22. What is electromagnetism?
  23. Draw a pattern of magnetic lines of forces due to circular coil?
  24. Abbreviate MRI?
  25. What is fuse? What is its function?
  26. How fuse saves our electrical devices?
  27. Explain with a neat diagram the principle and the working of electric motor?
  28. Explain with a neat diagram the principle and the working of electric generator? What is solenoid? 
  29. What is live wire?
  30. What are the characteristics of a  fuse wire?
  31. What is potential difference commonly in the electric supply in India?
  32. What is earth wire? What is its function?
  33. How can we avoid overloading in our homes?
  34. What is compass needle?
  35. What are AC and DC? What type of current we used in our homes?
  36. Why pure iron is not used in making permanent magnets. Name materials used for making permanent magnets.
  37. State Right hand thumb rule for finding the direction of magnetic field, around a current carrying straight conductor. How will the magnetic field be affected:-
  38. On increasing the current
  39. On changing the direction of flow of current.

 

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