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An electric field vecE = (20i + 30j) NC^...

An electric field `vecE = (20i + 30j) NC^(-1)` exists in the space. If the potential at the origin is taken to be zero find the potential at (2m, 2m).

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` E=(i20+j30)N//C, `
` V=at(2m,2m), `
` r=(2i+2j) `
` So, V=-E.r `
` =-(i20+30j).(2i+2j) `
` =-(2xx20+2xx30)=-100V `
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