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

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

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The earth wire is connected as a safety measure with all electrical appliances that have a metallic body, e.g., microwave, electric press, toaster, geyser, cooler, AC, etc. Any leakage current to the metal body of the appliance is sent to the earth by the earth wire thereby preventing the user from getting a severe electric shock.
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ZEN PUBLICATION-MAGNETIC EFFECTS OF ELECTRIC CURRENT -Textual exercise
  1. Draw the diagram of a simple electric generator. Label the following p...

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  2. When does an electric short circuit occur ?

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  3. What is the function of an earth wire ? Why is it necessary to earth m...

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  4. Which of the following correctly describes the magnetic field near a ...

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  5. The phenomenon of electromagnetic induction is

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  6. The device used for producing electric current is called

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  7. The essential difference between an AC generator and a DC generator ?

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  8. At the time of a short circult, the current in the circuit.

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  9. State wheteher the following statements are true of false.

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  10. List two methods of producing magnetic fields.

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  11. How does a solenoid behave like a magnet ? Can you determine the nor...

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  12. When is the force experienced by current carrying conductor placed in ...

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  13. Imagine that you are sitting in a chamber with your back to one wall. ...

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

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

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  16. A coil of insulated copper wire is connected to a galvanometer. What ...

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  17. Two circular coils A and B are place close to each other . If the curr...

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  18. State the rule to determine the direction of a : [i] Magnetic fiel...

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  19. Explain the underiying and working of an electric generator by drawin...

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  20. Draw the diagram of a simple electric generator. Label the following p...

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