Q. A 6 OHM RESISTANCE WIRE IS DOUBLED BY FOLDING. CALCULATE ITS NEW RESISTANCE.
Asked by deepitapai | 10th Oct, 2008, 12:14: AM
use the formula R= p l / a , where R is the resistance ,p is resistivity , l is the lenght of the wire, A is the cross-sesctional area , when the wire is doubled the area will become twince and length will become half , resistivity will remain the same use the formula for both the cases and find the ratio and hence answer.
Answered by | 10th Oct, 2008, 07:25: AM
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