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The electric field in a region is given ...

The electric field in a region is given by `vecE = (A/x^3) hati.` Write a suitable SI unit for A. Write an expression for the potential in the region assuming the potential at infinity to be zero.

A

`A/(2x)`

B

`A/(2x^2)`

C

`A/(2x^3)`

D

`(2x^2)/A`

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