Definition. The electric potential energy of a system of point charges is defined as the work required to assemble this system of charges by bringing them close together, as in the system from an infinite distance.

## How do you calculate the electric potential energy between two charges?

Recall that the electric potential is defined as the potential energy per unit charge, i.e. V=PEq V = PE q . The potential difference between two points ΔV is often called the voltage and is given by ΔV=VB−VA=ΔPEq Δ V = V B − V A = Δ PE q . The potential at an infinite distance is often taken to be zero.

## What does positive potential energy of a system of two charges mean?

Positive mutual potential energy of a system containing two charges corresponds to. Yes, Negative mutual potential energy corresponds to attraction between two charges.

## What is the dimensional formula of refractive index?

Refractive Index is defined as the relative speed at which light moves through a material with respect to its speed in vacuum. As both the values belong to same quantity (speed), units gets nullified. So Refractive Index is dimensionless quantity. Dimensional Formula of Refractive Index= M0L0T0.

## Is refractive index a dimensional variable?

Refractive index is dimensionless variable.

## Which constant is dimensionless?

Examples. Dimensionless fundamental physical constants include: α, the fine-structure constant, the coupling constant for the electromagnetic interaction (≈ ​1⁄137). Also the square of the electron charge, expressed in Planck units, which defines the scale of charge of elementary particles with charge.

## Are all constant are dimensionless?

example, universal gravitational constant, Planck’s constant etc. do have dimensions.

## What is dimensional constant give example?

Those constant which have dimension but constant value called dimensional constants , example of these constant like gravitational constant, electric field constant , efsonal(€) ,etc there are many dimension constants .

## How do you explain dimensional analysis?

Dimensional Analysis (also called Factor-Label Method or the Unit Factor Method) is a problem-solving method that uses the fact that any number or expression can be multiplied by one without changing its value. It is a useful technique.

## Is density is a dimensional variable?

SOLUTION:- dimensional variable are those physical quantities which have dimensions of the form [ M^a L^b T^c ]. ⇒ density = M L-³. (b) Angle :- we know that angle have no dimension ,it is dimension less quantity.

## Is strain is a dimensional variable?

5 non dimensional variables and is strain and relative density are non dimensional variables.