Two wire a and b are of same metal, have the same area of cross-section and have their lengths in the ratio 2:1. what will be the ratio of currents flowing through them when the same potential difference is applied across the length of each of them?
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metal is same so resistivity is same
area of cross section is same
get their resistance .
potential across each rod is same so use it by using ohm's law for both rods equal both the potential and get the ratio of current .
Other variables like resistivity and area will cancel out and lengths are already in terms of their ratio.
area of cross section is same
get their resistance .
potential across each rod is same so use it by using ohm's law for both rods equal both the potential and get the ratio of current .
Other variables like resistivity and area will cancel out and lengths are already in terms of their ratio.
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