21.
(a) In the following figure, three conducting wires are shown along with their length and area of
cross section. If all are made of same material of resistivity p, find their resistance, and conclude
which wire is having least resistance.
(b) In the following circuit, find one pair of resistances which are connected in series and one pair
of parallel combination of resistances,
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cross section. If all are made of same material of resistivity p, find their resistance, and conclude
(a) In the following figure, three conducting wires are shown along with their length and area of
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