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List three sources of magnetic fields....

List three sources of magnetic fields.

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(i) Natural and artificial magnets (ii) Electromagnets (iii) A conductor, a coil and a solenoid carrying current (iv) Earth.
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PRADEEP-MAGNETIC EFFECTS OF ELECTRIC CURRENT-NCERT EXERCISES
  1. Which of the following correctly describes the magnetic field near a l...

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  2. The phenomena of electromagnetic induction is:

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  3. The device used for producing electric current is called a:

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  4. The essential difference between an AC generator and a DC generator is...

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  5. At the time of short-circuit, the current in the circuit:

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  6. State whether the following statements are true or false. (a) An ele...

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  7. List three sources of magnetic fields.

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  8. How does a solenoid behave like a magnet? Can you determine the north ...

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  9. When is the force experienced by a current-carrying conductor placed i...

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  10. Imagine you are sitting in a chamber with your back to one wall. An el...

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  11. Draw a labelled diagram of an electric motor. Explain its principle an...

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  12. Name some devices in which electric motors are used.

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  13. A coil of insulated copper wire is connected to galvanometer. What wou...

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  14. Two circular coils A and B are placed close to each other. If the curr...

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  15. State the rule to determine the direction of a (i) magnetic field p...

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  16. Explain the underlying principle and working of an electric generator ...

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  17. When does an electric short-circuit occur?

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  18. What is the function of an earth wire? Why is it necessary to earth me...

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