Question

Two charged particles having charges $+25\mu C$ and $+50\mu C$ are separated by a distance of $8cm$. The force acting on them is:

• A. $50kN$
• B. $10kN$
• C. $2.7kN$
• D. $1.7kN$

Answer 1

The correct option is D $1.7kN$

$Force=\frac{1}{4\pi {ϵ}_0}\frac{q_1{q}_2}{r^2}$

$=\frac{9\times {10}^9\times 25\times {10}^{-6}\times 50\times {10}^{-6}}{(0.08{)}^2}$

$=\frac{9\times 25\times 5}{64}\times {10}^{2}N$

$=1.7\times {10}^{3}N$

$=1.7KN$