Q.

A uniform electric field of magnitude 325 V/m is directed in the negative y-direction in figure. The coordinates of point A are (-0.2 m, -0.3 m) and those of point B are (0.4 m, 0.5 m). Calculate the potential difference VBVA (in volts), along the path shown in the figure.

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answer is 260.

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Detailed Solution

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The potential difference between two points A and B in electric field as, VBVA=ABEdr

Here the electric field is constant, here we can write the potential difference between points A and B as

VBVA=ExxBxA+EyyByA

=[(325){(0.5)(0.3)} +0]          Ex=0

=325×0.8=260 V

VBVA=+260 V

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