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How can it be shown that a magnetic fiel...

How can it be shown that a magnetic field exists around a wire through which a direct current is passing?

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If a magnetic compass needle is placed near the wire, the needle deflects indicating the presence of a magnetic field.
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ZEN PUBLICATION-MAGNETIC EFFECTS OF ELECTRIC CURRENT -Additional question section (Very-short-answer [vsa] type questions)
  1. Name the type of current given by a cell.

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

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

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

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

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

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

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  8. What is the difference between the wires used in the element of an ele...

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  9. Electricians wear rubber shoes or rubber hand gloves while working . W...

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  10. What are the two possible causes of excessive heating of electric wire...

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  11. What happens if a 5 A fuse is connected to a wire carrying 15 A curren...

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  12. What is the colour of live wire ?

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  13. A current flows through a horizontal power line from east to west. Wha...

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  14. What is meant by magnetic field ?

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  15. What are magnetic field lines ? How is the direction of a magnetic fie...

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  16. Name an instrument, in which the directive property of a magnet is use...

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  17. Identify the poles of the magnet in the given Figures.

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  18. What is the basic cause of an induced emf ?

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

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

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