A wire having length l and area of cross section A has resistance of 4 Ω. What will be the effect on resistance if the length of the wire is doubled keeping area of cross section constant.
8 Ω
16 Ω
Resistance will remain same
None of These
Please answer this question.
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Answered by
1
Explanation:
We know
R=ρ
A
l
, now area becomes half and length is double .
R
1
=ρ
2
A
2l
=ρ
A
4l
=4R
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