TestUstad

Value of εr for various dielectrics is always

Correct answer: C. greater than unity

  • A. less than unity
  • B. equal to unity
  • C. greater than unity
  • D. no hard and fast rule

Explanation

εr is called relative permittivity. It is the ratio of permittivity of a substance ε and the permittivity of free space εo. εr = ε/ εo.As, the permittivity of of a substance is always greater than the permittivity of free space. So, their rotio will also, always be greater than 1

Written and checked by , contributorLast updated
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.

Start a free Electrostatics testAll Electrostatics MCQs

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.

Lecturer Physics Test Physics80 MCQsSubject Specialist Physics Test Physics80 MCQsNET Physics60 MCQsNUMS Physics40 MCQsDUHS Physics36 MCQsETEA MDCAT Physics36 MCQsKMU Physics36 MCQsMDCAT Physics36 MCQsECAT Physics30 MCQsETEA Engineering Admission Test Physics30 MCQsGIKI Physics30 MCQsNED Physics30 MCQsPIEAS Physics30 MCQsPMD Physics25 MCQsBSN Entry Test Physics20 MCQsPAF Airman Physics15 MCQs

More Electrostatics questions

The leaves of a positively charged electroscope diverge more when an object is brought near the knob of the electroscope. The object must be

Two thin infinite parallel plates have uniform charge densities + σ and -σ The electric field in the space between them is

Electric flux due to a point charge is

SI unit of permittivity of free space is

The diagram shows two pairs of heavily charged plastic cubes. Cubes I and 2 attract each other and cubes I and 3 repel each other

The variation of electric potential due to a point charge with distance is represented by the graph (where V along y-axis and r along x-axis)