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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?

MBD -HARYANA BOARD-MAGNETIC EFFECTS OF ELECTRIC CURRENT-EXAMPLE
  1. Two circular coils A and B are placed close to each other. If the curr...

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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 me...

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  4. In case of a solenoid, the strength of magnetic field depends upon

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  5. What is an electromagnet?upon what factors its strength depends?

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  6. The circulating induced current produced in a metal plate due to the c...

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  7. What do you understand by magnetic effect of current? To understand th...

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  8. What is magnetic field? Give important properties of magnetic field li...

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  9. Which rule is shown in the figure?Define the rule in which device this...

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  10. In the figure which law is shown?lablel 1 and 2 in relation to the law...

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  11. Name the law shown in the figure lable 1 and 2 according to this law.

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  12. In the alongside figure a straight conductor B is carrying current in ...

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  13. In the alongside figure a straight conductor B is carrying current in ...

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  14. What is electro-magnetic induction?

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  15. List some such electric applicances in which electric motor is used.

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  16. What is electric fuse?What is its imnportant?

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  17. Why the fuse wire should have high resistance and low metling point?

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  18. What is meant by over-loading?

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  19. When does an electric short-circuit occur?

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  20. What are hazards of electricity?

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