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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. Can we have a single north pole, or a single south pole?

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  6. Natural magnets are stronger than artificial magnets.

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  7. Magnetic lines of force are

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

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

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  10. Choose the correct match. {:("(i) Primary succession","(a) Fast"),("...

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

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

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  13. When an iron bar is moved over a bar magnet along its length the attra...

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  14. The attracting power of a magnet is

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  15. The above diagrame is the pattern of magnetic lines of force obtained ...

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  16. In the single touch method of magnetization , the north pole of a bar ...

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  17. Assertion: Magnetic lines of force never intersect. Reason: The dire...

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  18. The vertical plane in which magnetic needle lies at a place is called

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  19. The effective length of the magnet shown above is .

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  20. The equatorial meridian of a magnet

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