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why the resistance blocks the flow of charges, lenght increses, resisstances also increases why

why the  resistance blocks the flow of charges, lenght increses, resisstances also increases why

Grade:12

1 Answers

Sher Mohammad IIT Delhi
askIITians Faculty 174 Points
10 years ago
the current is defined as V/R=I, the larger the length of wire , suppose infinite length then the time take to flow current is infinite, hence length is a barrier to flow of current between the two points, resistance is inversely proportional to cross sectional area, larger the area will more electrons will flow through area, hence less resistance.

sher mohamamd
b.tech, iit delhi

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