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Understanding the Electrostatic Model

Point charges...

Question

Point charges $Q_{1} = 5 m C$ (millicoulomb) and $Q_{2} = 6 m C$ (millicoulomb) are at a separation of 100m from each other. What is the magnitude of force on any one of the charge?

A

27N

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B

25N on Q₁ and 24N on Q₂

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C

23N

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D

not enough information is given in the question.

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Solution

The correct option is A
27N

$F = \frac{K q_{1} q_{2}}{r^{2}} = \frac{9 \times 10^{9} \times 5 \times 10^{- 3} \times 6 \times 10^{- 3}}{10^{4}}$

$= 27 N$

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