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Source (s ) of a mangnetic field is (are...

Source (s ) of a mangnetic field is (are)

A

an isolated magnetic pole

B

a static electric charge

C

a moving electric charge

D

all of these

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The correct Answer is:
A, C
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FULL MARKS-MAGNETISM AND MAGNETIC EFFECTS OF ELECTRIC CURRENT -ADDITIONAL QUESTIONS SOLVED
  1. Source (s ) of a mangnetic field is (are)

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  2. Magnetic field lines

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  3. A magnetic needle is kept in a non-uniform magnetic field. It experien...

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  4. The unit of pole strength ( magnetic charge ) is .

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  5. Earth's magnetic field always has horizontal component except at

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  6. The angle of dip at the magnetic equator is

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  7. At a certain place the horizontl component of earth's magnetic field i...

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  8. At magnetic poles the angle of dip is

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  9. The horizontal component of earth's magnetic field at a place is 3.6 x...

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  10. A bar magnet of magnetic moment M is cut into two parts of equal lengt...

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  11. A magnetic needle suspended by a silk thread is vibrating in the earth...

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  12. Demagnetisation of a magnet can be done by

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  13. All the magnetic materials lose their magnetic properties when

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  14. The relative permeability of a paramagnetic material is

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  15. The relative permeability of a diamagnetic material is

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  16. Which of the following is most suitable for the core of an electromagn...

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  17. Soft iron is used in many parts of electrical machines for

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  18. When a diamagnetic substance is brough near the north or the south pol...

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  19. At Curie point, a ferromagnetic material becomes

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  20. Magnetic permeability is maximum for

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