COMEDK2016PhysicsElectrostatics
A charge 10 nC is situated in a medium of relative permittivity 10 . The potential due to this charge at a distance of 0.1 ~m is
Options
- A900 ~V
- B90 ~V
- C9 ~V
- D0.09 ~V
Correct answer
B. 90 ~V
Step-by-step solution
Potential due to a point charge at a distance r is given by gathered V= 1 4 ₀ _ r q r Given, q=10 nC =10 10⁻⁹ C , _ r =10, r=0.1 ~m V= 9 10⁹ 10 10⁻⁹ 10 0.1 =90 ~V gathered