An electric field of \( 20 \mathrm{~N} \mathrm{C}^{-1} \) exists along the \( x \)-axis in space...

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An electric field of \( 20 \mathrm{~N} \mathrm{C}^{-1} \) exists along the \( x \)-axis in space. Calculate the potential difference \( V_{B}-V_{A} \) where the points \( A \) and \( B \) are given by,
(a) \( A=(0,0) ; B=(4 \mathrm{~m}, 2 \mathrm{~m}) \)
(b) \( A=(4 \mathrm{~m}, 2 \mathrm{~m}) ; B=(6 \mathrm{~m}, 5 \mathrm{~m}) \)
(c) \( A=(0,0) ; B=(6 \mathrm{~m}, 5 \mathrm{~m}) \).
Do you find any relation between the answers of parts (a), (b) and (c)?
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