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What is the function of an earth wire? W...

What is the function of an earth wire? Why is it necessary to earth metallic appliances?

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Explore conceptually related problems

(a) State Fleming's left Hand Rule. (b)List three characteristic features of the electric current used in our homes. (c) What is a fuse ? why is it called a safety device ? (d) why is it necessary to earth metallic electric appliances ?

(i) What is the function of earth wire in electrical instruments? (ii) Explain what is short circuiting an electric supply. (iii) What is the usual current rating of the fuse wire in the line to feed: (a) Lights and fans? (b) Appliances of 2kW or more power?

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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