Can an object be positively and negatively charged at the same time?

A purely positively charged electroscope, because it has a redundant positive charge, is not neutral, and the following two foils are positively charged, so it rejects Follow-up question: Only positively charged electroscope, there is no other object next to it Follow-up question: Uh....I just don't understand why the foil must be positive and not negative, so where does the negative charge go?

Excuse me, thank you: The negative charge is still there, it has not changed, but the positive charge has been artificially increased, resulting in more positive charge, making the whole positive charge.

There are two cases of positive charge: 1, there is more positive charge, and 2, there is less negative charge. Of course, if you say a bunch of protons or a bunch of electrons; Something else. Supplement: For what you said.

I don't understand why the foil must be positive and not negative. The foil can be negatively charged, who told you no, you use a negatively charged ball to approach the electroscope, and the negative electrons of the electroscope are repelled under the foil, and the two foils are repelled due to negative electricity. Added:

Did you study physics and chemistry together, and think that metals within 4 valence cannot gain electrons, but can only lose electrons? "I don't understand why these two foils are positively charged, how they are not negatively charged and repel each other.

Are you satisfied with the above?

For example, if your big hair and small hair stand up, then it is possible that the big head hair is positively charged and the small head hair is negatively charged, and at this time, you are an object with both positive and negative charges.

What is Current? Electric current is the directional movement of electric charges. It can be positively charged.

It can also be the directional movement of a negative charge.

What is the same kind of electric current? My understanding is that the current flows inside a conductor. This conductor can be either a wire (solid) or an electrolyte.

liquids and gases).

We know that medium-cavity objects can be divided into conductors and insulators.

also semiconductors). There is an electric charge in the conductor that can move freely.

In a metal conductor, the free-moving charge is an electron, which is negatively charged. Therefore, the wires we commonly use are made of metal conductors. The direction of its current is related to the free electrons.

The direction of directional movement is reversed because the free electrons are negatively charged. We stipulate that the direction of directional movement of the positive charge is the direction of the current.

However, in the conduction of liquids, gases, the free charge is ionic. And positive ions.

Negative ions are present at the same time. For example, thunder and lightning are formed by the movement of positive and negative charges (ions) in opposite directions. It is also in the positive direction of the directional movement of the positive charge.

The magnitude of the current is equal to the magnitude of the current formed by the positive charge, plus the magnitude of the current formed by the directional movement of the negative charge.

Therefore, in general, the current of the metal conductor is formed by the directional movement of free free electrons, that is, the directional movement of negative charges.

Still in the electrolyte, the positive and negative charges move in opposite directions, and the two charges are moving in opposite directions at the same time.

The same electric current carries only one charge, and the high sale of a glass rod belt rubbed with silk is a positive charge, and a rubber rod rubbed with fur carries a negative charge. The same kind of charge is mutually exclusive, and the different charge attracts each other.

It is a song of electric power and loadIt is not the same as the weight of a negative charge. The relative mass of a positive charge.

for, negative charge, with a relative mass of 1 1834.

Positive electricity is the electrical property of an atom that loses electrons, and negative electricity is the electrical property of an atom that gains excess electrons; The electricity brought by a glass rod rubbed with silk is called positive electricity, and the electricity brought by a rubber rod rubbed with fur is called negative electricity; Positive electricity is represented by the symbol " ", and negative electricity is represented by the symbol " ".

Difference Between Positive Charge and Negative Charge.

Triboelectric generation. The phenomenon is different: the point of the old glass rod belt that has been rubbed with silk is called positive electricity, and the electricity belt of the rubber rod that has been rubbed with fur is called negative electricity.

The representation symbols are different: positive electricity is represented by the symbol " ", and negative electricity is represented by the symbol "—".

It is generated in different ways: positive electricity is generated by a positive charge, and negative electricity is generated by a negative charge.

Difference Between Proton and Electron: Proton we prescribe as positive charge and electron as negative.

Ever heard of the electrophoresis phenomenon? It was an experiment to prove that colloidal particles were charged. It is practical to use that principle to measure the charge of an object with a constant point.

Experimental process] To put it simply, put those small particles into a U-shaped tube filled with a slow salt (acid or alkali solution can also be used) solution, but the premise is that the solution does not react with small particles, and it is generally safer to use sodium chloride solution (that is, salt water).

After setting the U-shaped tube, insert the electrodes into the water surface on both sides.

Phenomenon + Principle + Analysis].

Before the electrode is plugged in, the small particles on both sides should be the same height (the communicator principle).But after inserting the electrodes, ......

If more particles are gathered in the positive direction, the object is negatively charged.

If more particles are gathered in the direction of the negative electrode, the object is negatively charged.

The principle is very simple, the same electricity repels each other, and the different electricity attracts each other.

— High number. In fact, there is a related test equipment - electroscope.

The method of electrical verification is detailed at the end of this encyclopedia entry.

Summary. What does a positive charge and a negative charge mean respectively.

What does a positive charge mean.

1 positive charge is said to carry one unit of positive charge.

1 negative charge is also said to carry one unit of negative charge.

So what is the amount of charge they have?

Probably Cullen.

A unit is an e? Yes.

It is difficult to change the number of positive charges in the nucleus, but the electrons outside the nucleus can get rid of the nucleus and transfer to another object, so that the number of negative charges in the electron belt outside the nucleus changes. When an object loses electrons, it shows being positively charged when the total number of negative charges in its electron band is less than the positive charge of the nucleus; On the contrary, an object that would otherwise be neutral, when it gets electrons, it shows being negatively charged.

When two objects rub against each other, because the nuclei of different objects have different abilities to bind electrons outside the nucleus, one of them must lose some electrons and the other gain excess electrons. If a glass rod is rubbed against silk, some of the electrons of the glass rod are transferred to the silk, and the glass rod is positively charged due to the loss of electrons, and the silk is negatively charged due to the electrons it gets. Rub the rubber rod against the fur, some of the electrons of the fur are transferred to the rubber rod, the fur belt is positively charged, and the rubber rod carries the same amount of negative electricity.

You can't judge this by yourself, you can only check the relevant information.

The charge carried by a glass rod rubbed with silk is called a positive charge, and a proton is a positive charge, while a positive charge is not necessarily a proton.

The charge of a rubber rod rubbed with fur is called a negative charge.

Negative charges are generally referred to as electrons.

The electricity carried by amber after rubbing against the fur is called negative charge, and one electron carries a negative charge of one unit.

Difference Between Positive and Negative Charges: A substance that loses an electron has a positive charge, and a substance that gains an electron has a negative charge.

Positive charge: Physically, the charge carried by a glass rod rubbed by silk is called a positive charge. Its essence is: the atoms in the substance (glass rods) lose their electrons.

Negative charge: Physically, the charge of a rubber rod that has been rubbed against the fur is called a negative charge. Its substance: the atoms in the substance (rubber rods) get the excess electrons.

Electrons revolve around the middle proton, and those that rotate forward are called positive charges, and those that reverse are called negative charges.

This is because the positive charge creates an electric field, and the negative charge also happens to be in this electric field due to being in the vicinity of the positive charge. According to the directionality of the force acting on the electric field, the charge is divided into positive charge and negative charge, and the electron is negatively charged. Objects with the same charge repel each other, and objects with a different charge attract each other.

The basic properties of the electric field produce an electric field force on the charge placed in it. Therefore, the negative charge is subjected to an electric field force, and according to the two laws that "the direction of the electric field force experienced by the negative charge is exactly opposite to the direction of the electric field strength", and the electric field line of the positive charge is directed to infinity by the positive charge fiber, it can be concluded that the negative charge is subjected to an electric field force directed towards the direction of the positive charge. So, this electric field slag blocking force is gravitational force.

The most basic properties of electric charges are: the same charges repel each other, and the different charges attract each other. One of the intrinsic properties of matter.

The phenomenon that amber can attract small and light objects after friction is the earliest discovery of the charge of objects. Then it was discovered that lightning strikes, induction, heating, irradiation, etc., can make objects electrified. The charge is divided into positive and negative, destroying the balance and trapping the same sign repels, different signs attract, positive and negative combinations, and neutralizing each other; The charge can be transferred, increasing and decreasing, while the total amount remains the same.