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Nichrome wire of length L and radius R has resistance 10 ohm.How would the resistance of the wire change when: only diameter of the wire is doubled?Justify 
Asked by prassanna.j | 03 Sep, 2023, 12:21: PM
answered-by-expert Expert Answer
Resistance of wire is inversely proportional to area.
 
If diameter is doubled, then area is doubled .
 
If area is doubeled , then resistance becomes one-fourth of initial value.
 
Hence , new resistance after doubling the  diameter of wire = ( 10/4 )Ω = 2.5 Ω
Answered by Thiyagarajan K | 03 Sep, 2023, 04:04: PM

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