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numerical

Asked by thebigboy 20th August 2008, 6:54 PM
Answered by Expert
Answer:

use the formual R = ρ L / A , where R is resistance, ρ is resistivity ,L is lenght of wire, A is area of crossesection.

use the formula for both the cases in one put the value of L = L and area = πr2 and in second case put the value of L=2L and area = π(2r)2 , for series combination add the resistance from above.and find the ratio,

Answered by Expert 21st August 2008, 9:26 AM
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