People use silkfrictionThe electricity of the passing glass rod belt is called positive electricity, which is represented by "+", andnegative electricitycorresponding.
Chinese name
positive electricity
Foreign name
positive electricity
Interpretation
Electricity generated by glass rod belt rubbed with silk
Related
The same kind of electricity repels each other, and the different kinds of electricity attract each other
Positive electricity is generated bypositive chargeGenerated atatomIs the one that makes up the nucleusproton；negative electricityIs created bynegative chargeProduced in the atom is outside the nucleusElectronics。Popularly explain that the glass rod rubs the silk to produce positive electricity, and the rubber rod rubscoatproducenegative electricityReason for.stayatomMedium, positively charged atomic nucleus bandnegative electricityOfElectronicsIt has the function of attraction, but different atomic nucleiElectronicsThe attraction of is different.Therefore, theatomThe attraction ability of the atomic nucleus in the silk is weaker than that of the atomic nucleus in the silk, so when the glass rod rubs the silk,ElectronicsWill run to the silk, so that the glass rod is positively charged (in fact, at the same time, the silk hasnegative electricity), the same reason can explain that the rubber rod is negatively charged after rubbing the fur.
The same kind of electricity repels each other, and the different kinds of electricity attract each other.[1]
charge
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stayelectromagneticsLi,charge(English: electric charge) YesmaterialOne ofphysical property。The charged substance is called "charged substance".Two charged substances will impose on each otherForceAt the other side, you will also feel the force exerted by the other side. The force involved complies with the Coulomb's law.There are two kinds of charge, "positive charge" and "negative charge".Materials with positive charge are called "positively charged";Material with negative charge is called "negatively charged".If two substances are both positively charged or both negatively charged, they are said to be "isoelectric"; otherwise, they are said to be "heteroelectric".Two isoelectric substances will feel the repulsive force exerted by each other;Two heteroelectric substances will feel the attraction imposed by each other.
The charge is manySubatomic particleIt has a basic conservation property.The charged particles are called "charged particles".The charge determines the physical behavior of charged particles in the electromagnetic field.Static charged particles will produceelectric fieldThe moving charged particles will produce electromagnetic fields, and the charged particles will also be affected by electromagnetic fields.The interaction between a charged particle and an electromagnetic field is calledElectromagnetic forceorElectromagnetic interaction。There are fourBasic interactionOne of.
Point charge
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Charged particles are often called electric charges, but the charge itself is not a particle, just for the convenience of description, you can imagine it as a particle.Those with more charges are said to have more charges.Charged particles in an external electric fieldCoulomb forceDepends on its charge.
Point chargeIt is an ideal model for charged particles.The real point charge does not exist. Only when the distance between charged particles is greater than the size of particles, or the influence of the shape and size of charged particles on the force exerted on each other can be ignored, this charged body can be called "point charge".
Whether an actual charged body can be regarded as a point charge is not only related to the charged body itself, but also depends on the nature of the problem and the accuracy requirements.Point charge is an abstract concept necessary for establishing basic laws and an indispensable analytical means for analyzing complex problems.For example, Coulomb's lawLorentz force lawThe establishment ofelectric fieldThe concept of point charge is applied to the quantitative study of the interaction between several charged bodies, the introduction of test charge, etc.
Bound charge and free charge
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Sometimes, although the total electric quantity of the object is equal to zero, the charge distribution may be uneven (for example, because there is an external electric field).For this condition, the substance is calledElectrodes。Bound chargeIt is the electric charge generated by the electrode, which is bound inside the atom.It is obviously different from the bound charge,Free chargeIt is the extra charge placed from the outside, which is not bound inside the atom.The movement of charged particles in a certain direction formselectric current, especially inMetalInternally moving electrons.
The charge of the antiparticle is the same as that of the corresponding particle, with the same electric quantity but different electrical properties.Quarks have non integer charges, either - e/3 or 2e/3;But scientists have never observed the existence of individual quarks (this fact can be usedAsymptotic freedom(Asymptotic freedom).
