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Name one metal each to make a permanent ...

Name one metal each to make a permanent magnet and a temporary magnet.

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MODERN PUBLICATION-MAGNETIC EFFECTS OF ELECTRIC CURRENT-EXERCISE
  1. What is an electromagnet? What does it consist of?

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  2. The best material to make permanent magnet is

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  3. Name one metal each to make a permanent magnet and a temporary magnet.

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  4. Describe an activity to show that you can make an electromagnet in you...

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  5. What is meant by magnetic field? Mention two parameters that are neces...

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  6. What are magnetic field lines? How is the direction of a magnetic fiel...

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  7. Describe an activity to demonstrate the direction of the magnetic fiel...

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  8. Using Biot-Savart's law, derive an expression for magnetic field at th...

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  9. What is an electromagnet?

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  10. What is an electromagnet ? List any of its two uses?

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  11. Draw a labelled diagram to show how an electromagnet is made.

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  12. What is the purpose of the soft iron core used in making an electroma...

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  13. What are magnetic field lines? How is the direction of a magnetic fiel...

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  14. Draw the lines of force of the magnetic field through and around singl...

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  15. Consider a circular loop of wire lying in the plane of the table, let ...

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  16. Identify the nature of poles of the magnets in a given figures.

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  17. Draw magnetic field lines due to a current carrying circular wire plac...

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  18. What is the magnitude of the induced currents in circular loop KLMN of...

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  19. An alternating electric current has a frequency of 50 Hz. How many tim...

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  20. What will be the frequencey of alternating current if its direction ch...

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