A 10 meter long wire has 20ohm resistance . it is cut in 40 pieces equally. then all the pieces connected in parallel. what is equivalent resistance offered by all the pieces.
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Answer:
Explanation:
10m -> 20ohm
Since, wire is cut in 40 equal pieces, therefore each piece corresponds to a length of 10/40m=0.25m
=> 0.25m-> (20/10*0.25)ohm=0.5 ohm
So, 40 resistors of resistance=0.5 ohm in parallel
=> Req.=0.5/40=1/80 ohm
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