MJ20 P12 Q35 / ON14 P11 Q33 Potential Drop Graph | CAIE A Level 9702 Physics

9702/12/M/J/20: A conductor consists of three wires connected in series. The wires are all made of the same metal but have different cross-sectional areas. There is a current I in the conductor.
Point Y on the conductor is at zero potential. Which graph best shows the variation of potential V with distance along the conductor?
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[@muhammadsohaib3608]

how did we know that potential drop is continuous?

[@samraarshad1434]

Think of a resistor as multiple resistors in series
E.g. 10 ohm resistor is equivalent to ten 1 ohm resistors in series or a hundred 0.1 ohm resistors in series
Then if you connect the resistor to a battery, voltage drops after each resistor and eventually gets zero after the last resistor

[@waleedbinqasim4195]

Your explanation is quite vague.
It would have been better if u opted for mathematical route.
V=i.pl/A Grad=i.p/A less A more Grad

[@bee-wv2jr]

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