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ICSE Class 10 Answered

when radius of wire is doubled what will be the ratio between old and new resistance
Asked by bharadwajlucky26 | 14 Sep, 2018, 04:05: PM
answered-by-expert Expert Answer
Resistance R = ρ×(L/A) ................(1)
Resistance is inversly proportional to Area.
when radius of wire is doubled, area becomes 4 times of its original value.
Hence resistance will be (1/4)th of its original value
Answered by Thiyagarajan K | 15 Sep, 2018, 09:38: PM
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