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(a) Draw a circuit diagram to show how a...

(a) Draw a circuit diagram to show how a soft iron piece can be transformed into an electromagnet.
(b) Describe how an electromagnet could be used to separate copper from iron in a scrap yard.

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LAKHMIR SINGH & MANJIT KAUR-MAGNETIC EFFECT OF ELECTRIC CURRENT -Exercise
  1. State and explain the Clock face rule for determining the polarities ...

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  2. Name any two factors on which the strength of magnetic field produced ...

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  3. (a) Draw a circuit diagram to show how a soft iron piece can be transf...

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  4. (a) How does an electromagnet differ from a permanent magnet ? (b) N...

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  5. The strength of the magnetic field between the poles of an electromagn...

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  6. The diagram given below represents magnetic field caused by a current...

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

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  8. Which of the following correctly describes the magnetic field near a l...

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  9. The north-south polarities of an electromagnet can be found easily by ...

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  10. The direction of electric current in a solenoid when viewed from a par...

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  11. The direction of electric current in a solenoid when viewed from a par...

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  12. Which of the following is most suitable for the core of electromagnets...

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  13. Magnetic effect of current was discovered by

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  14. A soft iron bar is inserted inside a current-carrying solenoid. The ma...

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  15. The magnetic field lines in the middle of the current-carrying solenoi...

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  16. The front face of a circular wire carrying current behaves like a nort...

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  17. The back face of a circular loop of wire is found to be south magnetic...

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  18. In the straight wire A, current is flowing in the vertically downward ...

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  19. The figure shows a solenoid wound on a core of soft iron. Will the end...

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  20. A current-carrying straight wire is held in exactly vertical position....

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