two copper wires A(OF LENGTH l and radius r) and B(of length 2l and radius 2r ) are connected in parallel.Find the ratio of the total resistance of parallel combination wire B to the resistance of wire A
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resistance = resistivity × length / area
for resistance in parallel
1/r = 1/r1 + 1/r2
for resistance in parallel
1/r = 1/r1 + 1/r2
kushagrasaxena2:
I can not understand
do u know what is resistance and its dependence on length and area ?
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