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The polarity of an electromagnet can be ...

The polarity of an electromagnet can be changed by changing the direction of electric current through the coil.

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PEARSON IIT JEE FOUNDATION-MAGNETISM -CONCEPT APPLICATION (Level 1)
  1. The magnetic compass is not useful for navigation near the magnetic po...

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  2. why in an electrical method of magnetisation, a direct current is used...

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  3. The polarity of an electromagnet can be changed by changing the direct...

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  4. Repulsion is a sure test for magnetism.

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  5. Isolated north pole can be produced.

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  6. Natural magnets are stronger than artificial magnets.

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  7. Effective length of a magnet isthan its actual length.

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  8. In order to prevent loss of magnetism, are used.

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  9. PASSAGE-I : A magnetic field is described by drawing the magnetic fiel...

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  10. The space surrounding a magnet within which its magnetic effect is fel...

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  11. The point beyond which a magnet cannnot be magnetised any further is c...

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  12. The end of a freely suspended magnet which points to the magnetic nort...

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  13. When a bar magnet is brought near an iron rod precedes

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  15. Magnetic lines of force are

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  16. In which of the following devices temporary magnets are used ?

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  17. Which of the following properties of a magnet is/are used in navigatio...

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  18. Choose the correct match A Ferromagnetic (a) water B. Diamagnetic ...

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  19. The direction of magnetic field at any point inside the field is given...

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  20. Which of the following is a non- magnetic substance ?

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