A positive charge of 4 ĀµC exerts a force of 8 N on an unknown charge 20 cm away. The unknown charge is : Īµ0=10ā»ā¹/36Ļ (F/m) Select one: a. +44 C b. None of these c. 9.5 C d. +8.8 C
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Step 1: Write down the Coulomb's law: $F = k \frac{|q_1 q_2|}{r^2}$ where $F$ is the force, $k$ is Coulomb's constant, $q_1$ and $q_2$ are the charges, and $r$ is the distance between the charges. Show moreā¦
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