Two conducting wires of same materials ,equal length and equal diameter are first connected in series and then parallel. how does the heat produced by the combination of resistance change?

Asked by Navaswati | 6th Oct, 2013, 07:36: AM

Expert Answer:

Resistance of one of the first wire is R, therefore the resistance of the other wire is also R.

Series connection means equivalent resistance = R1 + R2

Therefore, equivalent resistance series connection = 2 R (since R1 and R2 are equal)

Now in parallel connection, the equivalent resistance = 1 /R1 + 1/R2

                                                                          = R/2

So their relation here means ratio that is = 2/(1/2)

                                                          = 4:1

 

Answered by Faiza Lambe | 6th Oct, 2013, 11:37: AM

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