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Is the steady electric current the only ...

Is the steady electric current the only source of magnetic field? Justify your answer.

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No, magnetic field can be produced by steady electric current as well as by a magnet.
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MODERN PUBLICATION-MOVING CHARGES AND MAGNETISM-Revision Exercises (Very Short Answer Questions )
  1. Is the steady electric current the only source of magnetic field? Just...

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  2. Is the source of magnetic field analogue to the source of electric cur...

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  3. A magnetic compass shows a deflection when placed near a current-carry...

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  4. What is the relation between the SI unit and CGS unit of magnetic fiel...

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  5. The force vecF experienced by a particle of charge q moving with a vel...

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  6. What is the force experienced by a charged particle of charge moving f...

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  7. What is the total force on a moving charge in a cubical region of cros...

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  8. A stationary charge experiences no magnetic Lorentz force. Why?

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  9. A charged particle moves through a region of uniform magnetic field pe...

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  10. चुम्बकीय पारगम्यता क्या है ? मात्रक लिखो ?

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  11. Can a galvanometer as such be used for measuring the current? Explain.

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  12. State the principle of moving coil galvanometer.

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  13. What is the magnetic force experienced by a charged particle if veloci...

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  14. Show that the kinetic energy of the particle moving in a magnetic fiel...

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  15. Why are pole pieces of galvanometer made concave?

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  16. What will be the path of a charged particle moving perpendicular to a ...

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  17. A neutron enters a magnetic field region, normally to the direction of...

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  18. A porton and an electron travelling along parallel paths entre a reg...

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  19. Which on the following will describe the smallest circle when projecte...

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  20. What do you mean by crossed fields?

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