Electrostatics Question 204
Question: Two charges placed in air repel each other by a force of $ {{10}^{-4}}N $ . When oil is introduced between the charges, the force becomes $ 2.5\times {{10}^{-5}}N $ . The dielectric constant of oil is [MP PET 2003]
Options:
A) 2.5
B) 0.25
C) 2.0
D) 4.0
Show Answer
Answer:
Correct Answer: D
Solution:
By using $ K=\frac{F _{a}}{F _{m}}\Rightarrow K=\frac{{{10}^{-4}}}{2.5\times {{10}^{-5}}}=4 $
