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State the conclusion from the observatio...

State the conclusion from the observation that a current-carrying wire deflects a magnetic needle placed near it .

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The conclusion is that a magnetic field exists around a current-carrying conductor.
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ZEN PUBLICATION-MAGNETIC EFFECTS OF ELECTRIC CURRENT -Additional question section (Very-short-answer [vsa] type questions)
  1. What is the basic cause of an induced emf ?

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  2. Does an induced emf develop in a conductor when moved in a direction p...

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  3. State the conclusion from the observation that a current-carrying wire...

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  4. What is magnetic effect of current ?

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  5. Why are magnetic field lines closed curves ?

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

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

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

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

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

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

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

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

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

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  15. What is an electric generator or dynamo ?

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

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

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

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

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

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