Question

Two charges each equal to $2\mu C$ are 0.5m apart. If both of them exist inside vacuum, then the force between them is

• A. 1.89 N
• B. 2.44 N
• C. 0.144 N
• D. 3.144 N

Answer 1

The correct option is C 0.144 N

By using $F=9\times {10}^9.\frac{Q^2}{r^2}$
$\Rightarrow F=9\times {10}^9.\frac{(2\times {10}^{-6}{)}^2}{(0.5{)}^2}=0.144N$