Why in a conductor charge is transfer by free electronsrather than by positive charges?
What particles are you comparing them with? Basically, among the common particles, the positive charge would be a proton. Compared to electrons:
- Protons are almost 2000 times more massive, and can therefore not move around freely.
- They are bound to their atoms by strong nuclear forces.
Positive ions (entire atoms with missing electrons) can still move around, and in some kinds of current it is actually positive ions that transfer the charges. But in a solid, they can't move around freely.
Yes. Atoms have protons (positive charges) and electrons (negative charges). However, quite often it is the negative charges (the electrons) that carry the current. In any case, the net charge in a conductor is usually zero (it is neutral) - the electrons simply go in one end and out the other, but the total number of electrons will doesn't change in normal circumstances, whether there is a current or not.
Electron. The definition of a conductor (electrical as opposed to music or trains) is a material that easily allows the movement of charges and in most cases, that is a metal and the charges are electrons. One can, however, have ionic fluids and the movement of positive ions as part of the conductivity, but that doesn't start with the letter e.
Yes because they are both the same electron until its starts lightning they both become negative and attract! Opposites attract smarty.. they are different groups of protons and electrons. Earth being positive repels the positive charges in the cloud which makes the lower part of the cloud increasingly negative. this difference in charges causes lightning which is a transfer of charges to try and equal out the conflicting balance of positive and negative charges.
the answer is both positive and negitive charges and that is because to make lighting it has to be positive and negitive charges because if there is both 2 negitive charges will both repel and the same thing will happen to positive charges but when positive and negitive charges and positive charges will attract
When salt dissolves in water its ions separate and they become free to move. The positive ions are attracted to the negative electrode (the cathode). The negative ions go to the anode. Positive and negative ions from the water also do this. Some of the ions are discharged. The net result is that a current flows in the external circuit, and the salt is chemically changed. If it is sodium chloride, hydrogen is produced at…
When there is no current passing through a conductor you say magnetic field is zero but in a conductor charges are in motion then why is there no magnetic field?
When there is no current passing through a conductor, charges are stilll in motion, but they are disorganized and not flowing. The magnetic fields by all of those random movements cancel each other out. That is why there is no magnetic field in a conductor with no current, even though there is movement in the charges.
It depends on what kind of conductor we consider and which of the four substance's states the conductor is in. For all metals and semiconductors in the solid state charge carriers are electrons (they are negatively charged particles) For the conductors of the second kind or electrolytes the charge carriers are ions (usually both signs positive and negative, but for the so-called solid electrolytes the carriers can be ions of only one sign (mostly positive)…
What happens to the electric field inside a conductor when free charges arrange themselves on its surface?
Electric fields are vector quantities because they contain both magnitude and direction. The direction of the electric field is the direction of the electrical force on a small positive charge. The free charges in the conducting surface will arrange themselves on the surface of the conductor in a way such that all field contributions inside cancel one another.
it is the rate at which electric charges pass though a conductor. The charged particle can be either positive or negative. In order for a charge to flow, it needs a push (a force) and it is supplied by voltage, or potential difference. The charge flows from high potential energy to low potential energy.
There is no electric field inside a conductor. Otherwise, the charges in the conductor would move. Charges exist only on the surface of a conductor. Otherwise, there would be electric fields inside. All points of a conductor are at the same potential. Since DV=-EDx, since E=0, the potential must be constant.