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Potential Gradient and Relation between Electric Field and Potential

An electric f...

Question

An electric field $\to E = (20 ˆ i + 30 ˆ j) N / C$ exists in the space. If the potential at the origin is taken to be zero,find the potential at $(- 0.2 m, - 0.1 m)$

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Solution

$V_{A} - V_{O} = - \to E . (\to A - \to O) = - (20^i + 30^j) . (- 0.2^i - 0.1^j) = 7 V$

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