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What happens to a circuit when the switch is off?

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The magnetic field disappears. The metalfacts as a magnet as longe as the coil carries a current
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S CHAND IIT JEE FOUNDATION-MAGNETISM-SELF ASSESSMENT SHEET-6
  1. State whether the following statements are true or false. Heating in...

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  2. State whether the following statements are true or false. Induced ma...

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  3. Answer the following questions. What is piece of iron inside a wire ...

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  4. Choose the letter of the best answer What happens to a circuit when ...

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  5. Answer the following questions. How can you increase the strength of...

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  6. Answer the following questions. You can make an electromagnet by wra...

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  7. A small magnet is suspended by a silk thread from a rigid support such...

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  8. Four all pins are hanged from the north pole of a bar magnet. Mark the...

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  9. Two long needies are attached to the poles of a horse shoe magnet. Sho...

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  10. Show the poles in the broken parts of the magnets when it is divided i...

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  11. Show the poles in the broken parts of the magnets when it is divided i...

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  12. Metal bars are brought near each pole of a compass needle in turn. Com...

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  13. A horse-shoe magnet when not in use, is kept with a metal piece A, tha...

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  14. A horse-shoe magnet when not in use, is kept with a metal piece A, tha...

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  15. A horse-shoe magnet when not in use, is kept with a metal piece A, tha...

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  16. The middle region of a bar magnet is

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  17. A magnet pulls some substances towards it. This means

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  18. A small magnet Y is placed near a heavy magnetX as ahown /n the figure...

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  19. When one end of an iron bar is placed near a compass:

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  20. Two ring magnets P and Q each with a hole in the centre are dropped on...

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