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Hello, I will post questions on this thread on Electric Field/Charge and other topics related to it. I'm studying it and am very weak at it thus any help will be appreciated.

For now, here's one question.

Thanks in advance.

For now, here's one question.

- I've come across two equations for E which are E = (Kq)/(r) and E = (Kq)/(r^2). I don't understand why it is r and sometimes (r^2). Are they specific for some cases? Also, which is used more often?

Thanks in advance.

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