Q. A 6 OHM RESISTANCE WIRE IS DOUBLED BY FOLDING. CALCULATE ITS NEW RESISTANCE.

Asked by deepitapai | 10th Oct, 2008, 12:14: AM

Expert Answer:

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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