defence exam Navy SSR (Medical) Mock Test Series 2025 Physics Electric Charges and Coulomb's Law Coulomb’s Law
The force of repulsion between two identical positive charges when kept with a separation ‘r’ in air is ‘F’. Half the gap between the two charges is filled by a dielectric slab of dielectric constant = 4. Then the new force of repulsion between those two charges becomes
1
F/3
2
F/2
3
F/4
4
\(\frac{{4F}}{9}\)