# What is the formula for Coulomb's law?

The

**Formula**. The**Formula**.**Coulomb's law**describes the force between two charged particles. Here, F is the force between the particles, q_{a}and q_{b}are the charges of particles a and b. The separation between the particles is r, and k is a constant, 8.99x10^{9}(Nm^{2}/C^{2}).A.

### What is the constant of K?

Coulomb's

**constant**, the electric force**constant**, or the electrostatic**constant**(denoted k_{e}) is a proportionality**constant**in electrodynamics equations.#### What is the permeability constant?

The**permeability constant**(µ_{0}), also known as the magnetic**constant**or the**permeability**of free space, is a measure of the amount of resistance encountered when forming a magnetic field in a classical vacuum. The magnetic**constant**has the exact (defined) value (µ_{0}= 4π × 10^{−}^{7}H.#### What do you mean by permeability of free space?

The physical constant μ_{0}, (pronounced "mu naught" or "mu zero"), commonly called the vacuum**permeability**,**permeability of free space**,**permeability**of vacuum, or magnetic constant, is an ideal, (baseline) physical constant, which is the value of magnetic**permeability**in a classical vacuum.#### What is permittivity of a vacuum?

The physical constant ε_{0}(pronounced as "epsilon nought"), commonly called the**vacuum permittivity**,**permittivity**of free space or electric constant, is an ideal, (baseline) physical constant, which is the value of the absolute dielectric**permittivity**of classical**vacuum**. It has an exactly defined value.

B.

### What is K in kq1q2 R 2?

Coulomb's law is F=

**kq1q2**/**r2**where**k**=8.988x10^9 Nm2/C2=a constant of nature. This Coulomb's law resembles the law of universal law of gravitation except that the**k**constant is much stronger. It is one of natures patterns of symmetry.#### What is the SI unit of electric current?

ampere#### What is a flux density?

The**flux density**is the number of magnetic lines of**flux**that pass through a certain point on a surface. The SI unit is T (tesla), which is weber per square metre (Wb/m^{2}) and the unit in the CGS system is G (gauss). Magnetic**flux density**is usually represented in formulas with the symbol , a (pseudo) vector field.#### What is the meaning of test charge?

Asking for the direction of the field at a particular point is the same as asking for the direction of the force experienced by a positive**test charge**placed at that point. A**test charge**is a**charge**with a magnitude so small that placing it at a point has a negligible affect on the field around the point.

C.

### What does K equal in electric field?

the magnitude of the

**electric field**(**E**) produced by a point charge with a charge of magnitude Q, at a point a distance r away from the point charge,**is**given by the equation**E**= kQ/r^{2}, where**k is**a constant with a value of 8.99 x 10^{9}N m^{2}/C^{2}.#### What is Q in electric field?

The Force per Charge Ratio.**Electric field**strength is a vector quantity; it has both magnitude and direction. The magnitude of the**electric field**strength is defined in terms of how it is measured. Let's suppose that an**electric**charge can be denoted by the symbol**Q**.#### What is the formula for Coulomb's law?

The**Formula**. The**Formula**.**Coulomb's law**describes the force between two charged particles. Here, F is the force between the particles, q_{a}and q_{b}are the charges of particles a and b. The separation between the particles is r, and k is a constant, 8.99x10^{9}(Nm^{2}/C^{2}).#### What is the amount of electrical potential is measured by?

In the International System of Units (SI),**electric potential is**expressed in units of joules per coulomb (i.e., volts), and differences in**potential**energy are**measured**with a voltmeter.

Updated: 19th September 2018