Electrostatics Question 679
Question: Two insulated charged metallic sphere P and Q have their centers separated by distance of 60 cm. The radii of P and Q are negligible
Options:
A) $ 5.2\times {{10}^{-4}}N $
B) c $ 2.5\times {{10}^{-3}}N $
C) $ 1.5\times {{10}^{-3}}N $
D) $ 3.5\times {{10}^{-4}}N $
Show Answer
Answer:
Correct Answer: B
Solution:
[b] Here $ q _{1}=q _{2}=3.2\times {{10}^{-7}}c,r=60cm=0.6m $
Electrostatic force, $ F=\frac{1}{4\pi {\varepsilon _{0}}}\frac{q _{1}q _{2}}{r^{2}} $
$ =\frac{3\times 10^{9}{{( 3.2\times {{10}^{-7}} )}^{2}}}{{{( 0.6 )}^{2}}}=2.56\times {{10}^{-3}}N $
