Exams › NEET › Physics

When air is replaced by a dielectric medium of force constant K, the maximum force of attraction between two charges, separated by a distance:

1. decreases K-times
2. increases K-times
3. remains unchanged
4. becomes 1 / K² times

Correct answer: decreases K-times

Solution

The force between two charges in a medium is inversely proportional to the dielectric constant (K). Replacing air with a dielectric medium reduces the force by a factor of K.

Related NEET Physics questions

• A positively charged rod is brought near an uncharged conductor. If the rod is then suddenly withdrawn, the charge left on the conductor will be :
• Two metal spheres, one of radius R and the other of radius 2R respectively have the same surface charge density σ. They are brought in contact and separated. What will be the new surface charge densities on them?
• In a region, the potential is represented by V(x, y, z) = 6x − 8xy − 8y + 6yz, where V is in volts and x, y, z are in meters. The electric force experienced by a charge of 2 coulomb situated at point (1, 1, 1) is:
• If potential (in volts) in a region is expressed as V(x, y, z) = 6xy − y + 2yz, the electric field (in N/C) at point (1, 1, 0) is:
• What is the electrostatic force between the metal plates of a capacitor?
• When a proton is accelerated through \( 1 \, \text{V} \), then its kinetic energy will be

⚔️ Practice NEET Physics free + battle 1v1 →