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Why are magnetic field lines closed curv...

Why are magnetic field lines closed curves ?

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The magnetic field lines originate from north pole of a magnet and end at its south pole. Inside the magnet they are directed from south pole to north pole. So, the magnetic field lines are closed curves.
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ZEN PUBLICATION-MAGNETIC EFFECTS OF ELECTRIC CURRENT -Additional question section (Very-short-answer [vsa] type questions)
  1. State the conclusion from the observation that a current-carrying wire...

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  2. What is magnetic effect of current ?

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  3. Why are magnetic field lines closed curves ?

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  4. What happens if a bar magnet is cut into twopieces i] perpendicular...

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  5. What does the divergence of magnetic field lines near the end of a cur...

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  6. How can a sloenoid be used to magnetise a steel bar ?

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  7. In a solenoid, the current through each circular loop flows in the sam...

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  8. Name the rule which gives the direction of induced current in a conduc...

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  9. How is induced current in a secondary coil related to current in a pri...

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  10. Whenever there is a relative motion between a magnet and a coil, a cu...

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  11. Why is an alternating current advantageous over a direct current for ...

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  12. How can we trace a current-carrying wire hidden in a wall?

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  13. What is an electric generator or dynamo ?

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  14. Name the type of current given by a cell.

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  15. How is the type of current received in a domestic circuit different fr...

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  16. How can it be shown that a magnetic field exists around a wire through...

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  17. In a domestic electric circuit, mention the potential difference betwe...

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  18. What is the advantage of the earth-wire connection in domestic electr...

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  19. On which effect of an electric current does a fuse work ?

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  20. What are the functions of live and neutral wires ?

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