Who first measured the electrostatic force constant???

Coulomb was inspired by the twist scale in a textile machine and successfully used it to verify Coulomb's law.

Correctness. Coulomb torsion scale experiment.

Happened after about ten years, the Englishman Cavendish did.

Verify Wanyin with a torsion scale.

The central shaft of the instrument is equipped with a permanent magnet bracket, and the fastening screw on it can be unscrewed to make the bracket rise and fall to change the distance between the permanent magnet and the damping metal plate on the crossbar, and adjust the electromagnetic damping time of the crossbar rotation.

The entire instrument is encased in a plexiglass enclosure, which provides high transparency and protection against dust. The lower part of the plexiglass cover is made into a door that can be opened and closed, so that the insulating crossbar and erection pole can be cleaned, and the level of the insulating crossbar can be adjusted to make the metal ball electrified. The base of the instrument is equipped with three spiral legs, rotating feet, and the base level can be adjusted.

Coulomb did not measure the electrostatic force constant, but the electrostatic force constant was based on the Coulomb torsion scale experiment.

Measured out.

Because in Coulomb's time there was no charge.

, but the Coulomb force f and the distance between the two charges can be measured, and later there is a definition of electric current, which is amperes.

When we direct the current, describe the amount of charge passing through a certain cross-section per unit time;

That is, 1c is the amount of charge that a current of 1a flows through a certain cross-section in 1s. With the definition of the amount of charge, according to Coulomb's torsion scale experiment and Coulomb's law.

The electrostatic force constant can be calculated. I also reasoned based on physics knowledge, which needs to be verified.

Conditions applyIn Coulomb's law.

In the common formulation, there is usually a vacuum and a rest, because the experimental basis of Coulomb's law, the torsion scale experiment, is done in a subvacuum in order to exclude the influence of other factors. In addition, when talking about electrostatic phenomena, it often starts with the situation in a vacuum, so there is a saying for "vacuum" in Coulomb's law. In fact, Coulomb's law applies not only in a vacuum, but also in a homogeneous medium, as well as for stationary point charges.

Between. The above content refers to: Encyclopedia-Coulomb's law.

Although Coulomb experimentally derived Coulomb's law from the Coulomb torsion scale, he was not able to measure the value of the electrostatic force constant because the unit of electricity (coulomb) was not defined at that time. The value of the electrostatic force constant is calculated by Coulomb's law after the unit of electricity is defined.

Coulomb discovered the law of point charge interaction and measured the electrostatic force constant. Written in high school physics books.

The electrostatic constant was measured by Cavendish using a torsion scale experiment.

Coulomb was first measured by the New Scale, which is very close to the 9*10 9 we use today.

Landlord, you are wrong, the electrostatic force constant is derived from the Coulomb experiment.

The electrostatic force constant was neither measured by Coulomb by torsion scale, nor by later generations by Coulomb torsion scale, but calculated by Maxwell's related theories.

Because k in Coulomb's law is 1 (4* *0), where 0 is the vacuum permittivity. According to Maxwell's equations, the relationship between the speed of light c, the vacuum permittivity 0 and the vacuum permeability 0 is 0*0=1 c 2, and 0=4 *10 -7, so there is a value of the above k.

0 = 4 * 10 -7, in fact, this is implicit in the definition of the international unit of ampere.

In the International Unit Wild Watt system, 1 ampere is defined as 1 ampere if two parallel straight wires of infinite length (negligible in diameter) are passed through a vacuum of one meter apart and have an electric current of the same intensity, and their mutual attraction per meter is 2 10 -7 Newton.

Then according to the formula of Lorentz force, it is easy to get the exact number of 0, which is 0=4 *10 -7.

The electrostatic force constant is measured by Maxwell through real and empty tests.

The electrostatic force constant (Coulomb's constant) represents the point charge of two charges in a vacuum with a charge of 1c, and when they are 1m apart, the force between them rises and decreases. The electrostatic force constant is an error-free constant, and its value is about 10 9 n·m2 c 2. It was not measured by Coulomb by torsion scales, nor by later generations by Coulomb torsion scales, but calculated by Maxwell's related theories.

The Coulomb torsion scale is composed of a suspensory, a crossbar, two charged metal balls, a balance ball, a delivery ball, a knob and an electromagnetic damping part. Of the two charged metal balls, one is fixed on an insulated vertical pole, the other is fixed on one end of a horizontally insulated crossbar, and a balance ball is fixed at the other end of the crossbar.

The center of the crossbar is hoisted with a suspensory wire, connected with the knob at the top, and the old knob can be twisted to drive the insulated crossbar to rotate and stop in an appropriate position.

The metal ball on the crossbar (called the moving ball) and the fixed ball on the vertical strut are both on the circumference with O as the center and the half rod length L as the radius, and the position of the moving ball relative to the fixed ball can be read by the central angle marked by the engraved line on the shell of the scale.

When the two metal balls are electrified, the crossbar rotates under the action of the Coulomb moment on the moving ball, and the suspension wire undergoes torsional deformation, and the crossbar is in a stationary state when the torsional moment of the suspension wire and the Coulomb moment are balanced.

Applications of Electrostatic Force Constants:

The interaction force between charges, according to Coulomb's law, the electrostatic force between two point charges can be calculated by the electrostatic force constant. This has played an important role in the study of concepts such as electric field, electric potential energy, and electric potential.

Calculation of electric field, electrostatic force constant can be used to calculate electric field strength. The electric field refers to the effect of the force generated by an electric charge in space, and the strength, direction, and distribution of the electric field generated by the electric charge can be determined by the electrostatic force constant.

The calculation of capacitance, the electrostatic force constant is also related to the capacitance. Capacitance refers to the ability of a capacitor to store electrical charge, depending on the geometry and dielectric of the capacitor. The electrostatic force constant is used to calculate the capacitance value of a capacitor.

The electrostatic force constant is not measured by anyone, but calculated by Maxwell's theory of phase combustion. The electrostatic force constant refers to the point charge of 1c in both ridges in a vacuum, and the force between them is 1 m apart. The electrostatic force constant is an error constant, which is not measured by anyone, and Pinowang is calculated by Maxwell's related theories.

The electrostatic force constant is an error-free constant, which is neither measured by Coulomb by torsion scale, nor measured by later generations by Coulomb torsion scale, but calculated by Maxwell's related theories.

Represents the point charge of two electro-digging nuclei in a vacuum with a capay of 1c, and when they are 1 m apart, the force between them is .

k = The force acting between two charges at rest in a vacuum is proportional to the product of their charges and inversely proportional to the square of their distance, and the direction of the force is on their line.

Electrostatic force constant – k=

Note:1The conditions for the law to be established: vacuum, point charge.

2.Electrostatic force constant – k = coulomb torsion scale).

3.When calculating the Coulomb force, the charge is substituted only into an absolute value.

4.The direction is on their line, the same charge repels each other, and the different charge attracts.

5.The Coulomb force between two charges is a pair of interacting forces. Judgment.

1. The electrostatic force constant is an error-free constant, which is neither measured by Coulomb by torsion scale, nor measured by later generations by Coulomb torsion scale, but calculated by Maxwell's related theory.

2. The electrostatic force constant (Coulomb constant) represents the point charge of two charges in a vacuum with a charge of 1c, and when they are 1m apart, the force between them is. The static spike power constant is an error-free constant.

The electrostatic force constant is calculated by Maxwell's related theories. k=。

In 1773, the French Academy of Sciences announced a call for papers, "What is the best way to make a magnetic needle", an open call for compasses with strong pointing force and good anti-interference to be used in navigation. In 1777, Coulomb shared the jackpot with others with his "Study on the Best Method for Making Magnetic Needles".

He proposed that hanging a compass with a silk thread was a better way to meditate, and pointed out that the torsion of the wire could provide physicists with a way to accurately measure weak forces. After several years of hard work, he came up with the "torsion law": the torsional moment is inversely proportional to the length of the suspensory, proportional to the torsion angle of the suspensory, and proportional to the fourth power of the diameter of the suspensory.

This led him to invent the Coulomb torsion scale and used the data obtained from it to discover Coulomb's law.