SAGAR SINGH - IIT DELHI
Last Activity: 14 Years ago
Dear student,
Potential difference between two points in circuit is the energy lost by the charge in being transferred from one point to another. For example, potential difference between A and B is found with following formula;
VAB=VB-VA=∑ε-∑i.R
This formula shows the energy lost by charge moving from point A to point B.
If the direction of the current and current passing through the resistor are the same then we take i.R as "+", if they are in opposite directions then we take i.R as "-".
VAB=VB-VA= -ε2-(+i.R1+i.R2)
VCB=VB-VC= -ε3-(-i.R3)
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All the best.
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Sagar Singh
B.Tech, IIT Delhi