Relative permittivity εr is defined by the following relation:
Correct answer: A. Cmed/Cvac
- A. Cmed/Cvac
- B. Cvac/Cmed
- C. Cmed + Cvac
- D. Cmed×Cvac
Explanation
Relative permittivity (or dielectric constant) is a dimensionless factor that describes how much a dielectric material increases the capacitance of a capacitor. It is defined as the ratio of the capacitance with the medium (Cmed) to the capacitance in a vacuum (Cvac).
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Electrostatics
Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.
Practise Electrostatics
831 free Electrostatics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Electrostatics questions
Electric potential is:
The work done in placing a charge of 8μC on a condenser of capacity 100 nF is:
The metallic spheres A and B of radii 2m and 4m respectively carry the same charge 4x10⁻⁸C. If the spheres are connected by a copper wire then:
The coulombs force between two point charges, If magnitude of each charge is doubled and distance between charges is halved, the force between them becomes:
If E be the electric intensity of an electrostatic field, then the electrostatic energy density is proportional to:
A tin nucleus has a charge of +50e. If a proton is at a distance 10⁻¹² m from the nucleus, then the potential V at this position is (charge on the proton = 1.6 x 10⁻¹⁹ C: