Question

Which formula below correctly states Coulomb's Law?

Answer 1

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Answer 2

QUESTION:- Which formula below correctly states Coulomb's Law?

OPTIONS:-

$A. \: \: \: \: F = kqq/r^ 2 \\B. \: \: \: \: F = kqq/r \\C. \: \: \: \: F = qq/kr^ 2 \\D. \: \: \: \: F = kr^2 /qq$

ANSWER:-

F is directly proportional to the product of the charges

$F∝qq$

F is inversely proportional to the square of the distance between them

$F∝ \frac{1}{ {r}^{2} }$

from above 2 equation:-

we get:-

$F∝ \frac{qq}{ {r}^{2} }$

To remove proportionality sign we use constant for this case we r using constant k

$F = \frac{Kqq}{ {r}^{2} }$

So your answer is :-

OPTION A.

$F = \frac{Kqq}{ {r}^{2} }$