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The amount of the electric field produced by some point charge is 107.1 N/C at some...

The amount of the electric field produced by some point charge is 107.1 N/C at some distance from the charge. What is the amount of the electric field from the same point charge at a point three times further away in N/C?

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Answer #1

Since E = kq/r^2

=) E is directly proportional to square of distance r.

Hence on increasing distance by three times, E field will decrease by 9times.

Hence new E field is 107.1/9 = 11.9N/C

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