1.

none of these

Answer»

8J
4J
2
zero

Solution :Let R be resistance of each wire.
Total resistance in seires = 2 R
Total resistnace in paralel `=(R xx R)/(R+R) = R/2`
`THEREFORE` Heat produced per second `(= (V ^(2))/(R ))` at onstant VOLTAGE will be four TIMES in parallel than in series.


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