First slide
Electrostatic potential
Question

Uniform electric field of magnitude 100 V /m in space is directed along the line y = 3+ x. Find the potential difference between points A (3, 1) and B (I, 3) :

Easy
Solution

Slope of line AB = y2-y1x2-x1=3-11-3=-1

Slope of line y = 3 + x is + I.

So, line AB is perpendicular to given line.

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