Two charges are placed at a certain distance apart in vacuum. If an insulating slab is placed between them, then force will
Correct answer: B. Decrease
- A. Increase
- B. Decrease
- C. Remains constant
- D. Be zero
Explanation
When an insulating slab, also known as a dielectric, is placed between two charges, the force between them will generally decrease. This is because the dielectric reduces the effective electric field between the charges due to its polarization. The Coulomb force between the charges is inversely proportional to the permittivity of the medium between them. When a dielectric with a relative permittivity is introduced, As, F= ( 1/4πε0 εr) .(q1 q2 /r2)
Last updated
About Electric Field
An electric field is the force experienced per unit positive test charge, with the field of a point charge given by E = kQ/r² and directed away from positive charges or toward negative charges. Questions involve field lines, superposition and force on a charge, while electric field must be distinguished from electric potential.
Practise Electrostatics
831 free Electrostatics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Physics questions like this
Physics is on 13 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A charge of 2 C placed in electric field of 10 N/C what will be the work done in moving charge a distance of 5. How much work is done?
A close surface contains equal and opposite charges. The net electric flux through the close surface is
A closed surface contains two equal and opposite charges. The net electric flux from thesurface will be
A cube of side 5 cm has a charge of 6 C. The surface density of charge is_________?
A million electron are added to a pith ball. Its charge is________?