A WIRE OF RESISTANCE R HAVING A LENGTH L AND AREA OF CROSS SECTION A . WHAT IS THE RESISTANCE OF ANOTHER WIRE OF SAME MATERIAL HAVING A LENGTH 2L AND AREA OF CROSS SECTION 4A?
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R is directly proportional to length and inversely proportional to area
R=rho l/A
R1=rho 2l/4A
R1=R/2
I hope this helps
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