Types of Transformer

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 1.Step-up Transformer 

2.Step-down Transformer 

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Why Sound of Thunder is heard Later than we see Lightning???

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So You must have this question in your mind that Does Lightning and sound is produced at the same time or not because Lightning is seen Before we heard Thunder Sound . So as shown in above image We can understand that lightning and sound have a lot a difference between their respective speed and the Winner is light as it has more speed than of Sound and it is the answer to your question.  Lightning is produced because negative charge collides with positive charge in clouds or sometimes with Ground which have positive charge. One more thing is that they both are produced at the same time. The sound is produced because the light have a lot of heat which replaces the cool air in the atmosphere and thus Thunder sound is produced... So I hope you got the answer to your question do tell your friend about the reason behind this...
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