Tuesday, 7 June 2011

End of Topic Test Error FIX

Why is the light bulb safe to use?
Although it has a metal casing, it is still safe to use because it has an earth wire.
The earth wire creates a short circuit leading the electricity to the ground instead of electrocuting the person :)
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1 comment:

  1. Matt27 June 2011 at 19:26

    Well done. I can see that you've thought carefully about how to improve.

    ReplyDelete

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