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In case of a fire, before the firemen us...

In case of a fire, before the firemen use the water hoses, they shut off the main electrical supply for the area. Explain why they do this.

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MBD -HARYANA BOARD-CHEMICAL EFFECTS OF ELECTRIC CURRENT -EXAMPLE
  1. A tester is used to check the conduction of electricity through two li...

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  2. Does pure water conduct electricity? If not, what can we do to make it...

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  3. In case of a fire, before the firemen use the water hoses, they shut o...

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  4. A child staying in a coastal region tests the drinking water and also ...

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  5. Is it safe for an electrician to carry out electrical repairs outdoors...

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  6. Paheli had heard that rain water is as good as distilled water. So, sh...

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  7. Prepare a list of objects around you that are electroplated.

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  8. The process that you saw in Activity 14.7 is used for purification of ...

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  9. In order to kept the flow of electricity continue in circuit, which of...

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  10. Pankaj knows that pure water is bad conductor of electricity. If you d...

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  11. Which out of the following is insulator of electricity?

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  12. Which out of the following is not an insulator?

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  13. What is the effectr of passing electric current through the solution o...

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  14. Which effect of electric current current is used in electroplating ?

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  15. The availability of some amount of impurities make water:

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  16. A tester is used to check the conduction of electricity through two li...

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  17. Is human body a conductor or an insulator?

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  18. What are conductors?

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  19. What are insulators? Give examples.

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  20. Do all liquids allow electric current to pass through them?

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