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How can we trace a current-carrying wire...

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

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A current-carrying wire hidden in a wall can be detected using a compass needle . If the magnetic needle is moved along the wall, it deflects if a current-carrying wire is hidden inside it .
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ZEN PUBLICATION-MAGNETIC EFFECTS OF ELECTRIC CURRENT -Additional question section (Very-short-answer [vsa] type questions)
  1. Whenever there is a relative motion between a magnet and a coil, a cu...

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

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

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  4. What is an electric generator or dynamo ?

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

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

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

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

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

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

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

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

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

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

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

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  16. What is the colour of live wire ?

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

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  18. What is meant by magnetic field ?

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

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

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