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ICSE Class 10 Answered

What will be the resistance of a 6m long wire  but with4times the area of cross section?
Asked by bharadwajlucky26 | 14 Sep, 2018, 16:39: PM
answered-by-expert Expert Answer
Resistance R of a conducting wire,  R = ρ×(L/A) ...............(1)
 
Resistance is inversly proportional to area of cross section.
When area of cross section becomes 4 times of its original value and length remains constant,
resistance will be (1/4)th of its original resistance value.
Answered by Thiyagarajan K | 15 Sep, 2018, 20:58: PM

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