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Which of the following would decrease the resistance to the flow of an electric current through a body?



AShortening the conductor
BLengthening the conductor
CUsing a conductor with a smaller cross section
DHeating the conductor

Verified Answer :

R = ρ L/A. R= resistance, ρ= resistivity, L= length of the conductor. A = area of the conductor. Resistance is directly proportional to the length of the conductor. So if length of the conductor is decreased, resistance will also decrease. Hence A is the correct option

ndcasem

On page 37 it explains that If two conductors are composed of the same material and have the same cross-sectional area but different lengths, the electrical resistance of the longer conductor will be greater than that of the shorter conductor.

So the correct answer is A. shortening the conductor

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