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Why does a compass needle get deflected ...

Why does a compass needle get deflected when brought near a bar magnet?

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A compass needle gets deflected when brought near a bar magnet because the bar magnet exerts a magnetic force on the compass needle which is itself a tiny pivoted magnet (free to move in the horizontal plane).
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LAKHMIR SINGH & MANJIT KAUR-MAGNETIC EFFECT OF ELECTRIC CURRENT -Exercise
  1. What is the main difference in the wiring of an electric bulb and a so...

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  2. A domestic lighting circuit has a fuse of 5 A. If the mains supply is ...

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  3. Why does a compass needle get deflected when brought near a bar magnet...

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  4. Draw magnetic field lines around a bar magnet.

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  5. List the properties of magnetic lines of force.

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  6. Why don't two magnetic field lines intersect each other?

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  7. Consider a circular loop of wire lying in the plane of the table. Let ...

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  8. The magnetic field in a given region is uniform. Draw a diagram to rep...

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  9. Choose the correct option: The magnetic field inside a long straight...

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  10. Which of the following properties of a proton can change while it move...

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  11. A positively-charged particle (alpha particle) projected towards west ...

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  12. State Fleming's left-hand rule.

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  13. What is the principle of an electric motor?

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  14. What is the role of the split-ring in an electric motor?

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  15. Explain different ways to induce current in a coil.

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  16. State the principle of an electric generator.

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  17. Name some sources of direct current.

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  18. Which sources produce alternating current?

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  19. Choose the correct option: A rectangular coil of copper wires is rot...

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  20. Name two safety measures commonly used in electric circuits and applia...

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