Well intrinsic semiconductor is semiconductor crystal with no impurities in it. In intrinsic semiconductor the electrons in valence band(valence electrons) gain energy(due to thermal enegry) and break free into conduction band(means it become free electrons). As this electron breaks free, a vacancy is created in place of it. It is called as a hole. This hole has a positive charge. So current in semiconductor is due to flow of this free electrons and holes. But this current is very small in magnitude. The difference between free electrons and valenece electrons is that valence electrons are often bonded to other atoms in crystal. But free electrons can freely move throughout the crystal.
Electrons are current carriers in several electronics domain and also in intrinsic semiconductor .the generation of current cause by it the movement of electron is from negative potential to positive potential. and current flow in the opposite direction of it means positive to negative potential.
Electrons are mostdirectlyrelated to electric current. (Electric current is caused by the movement of electrons between atoms.)
It creates current!
No, electrons and current are not the same thing. Electrons represent charge. Charge is simply a difference in free electrons between two points. Current, on the other hand, is a flow of charge, or of electrons, from one point to another. Current, in amperes, is defined as coulombs (charge of electrons) per second past a point in a circuit.
There is no difference. The flow of electrons is current.
Electricity, this may be electrons in a direct current. In an alternating current the electrons stay where they are and it is only the energy that moves between electrons.
An intrinsic semiconductor is basically a pure semiconductor, though some might argue that a small amount of doping can still yield an intrinsic semiconductor. In the crystal structure of this material, there are very few electrons crossing the band gap into the conduction band, and this stuff doesn't want to conduct much current. But as temperature increases, more electron-hole pairs will appear as electrons jump that band gap and take up places in the conduction band. And if you guessed that increasing temperature will permit the intrinsic semiconductor to conduct current flow a bit better, you'd be right. The intrinsic semiconductor has a positive temperature coefficient. More heat, more conduction under the same conditions.
current is produced when there exists a potential difference between two points and d electrons move between these points.
"As the temperature increases, more covalent bonds are broken, and more free electrons and positive empty states are created... The concentrations (#/cm3) of electrons and holes are important parameters in the characteristics of a semiconductor material, because they directly influence the magnitude of the current. An intrinsic semiconductor is a single-crystal semicon- ductor material with no other types of atoms within the crystal. In an intrinsic semiconductor, the densities of electrons and holes are equal, since the thermally generated electrons and holes are the only source of such particles." i THINK it's because at room temp there are less free electrons where as when it's extrinsic semiconductors there are more (compared to intrinsic) again: my opinion. I'm looking for the answer as well
It is called an electrical current.
The current supplied to the filament for heating is defined as the Filament current. whereas When the filament is heated to a high temperature, the electrons are emitted. The flow of electrons form Cathode to anode is the tube Current.
The current is the flow of electrons. Temperature is the movement of atoms. As the current increases there is more collisions between the atoms and the electrons. Some of the energy from the electrons is transferred to the atoms, thus they move faster and so the temperature increases.
Static electricity is the accumulation of electrons on an object, while current electricity is simply a closed path that electrons follow.
The free electrons in a conductor will, when a difference of potential (voltage) is applied at its ends, participate in electron current flow (or just current, if you prefer). The voltage applied to the conductor will drive current through the conductor, and the free electrons will support current flow. These electrons will actually move through the conductor. As electrons are driven into one end of the conductor, the free electrons "shift over" and electrons stream out the other end of the conductor. This is the essence of current flow in conductors.
the direction of current is the direction of electrons move. the dirction of electric field can be negative to positive
Current is the about of electrons that pass at any given time. Voltage is the speed at which they pass.
Your question is not clear. A current is generated when a group of electrons flow through a conductor, and this happens when there is a potential difference between the 2 ends of the conductor. If you want to know how can we start the flow of electrons it is by creating a potential difference in between the 2 ends of the conductor.
They are related by Ohm's Law states that Voltage = Current x Resistance. Think of the voltage potential of being the source of electrons and the current is the electrons flowing through the circuit.
when the temperature increase, the collector current also increase. It is because of the intrinsic semiconductor current.
due to the poor conduction at room temperature,the intrinsic semiconductor as such,is not useful in the electronic devices.hence,the current conduction capability of the intrinsic semi conductor should be increased. this can be achieved by adding a small amount of impurity to the intrinsic semi conductor
Current flows in a metal due to abundant free electrons present in it. metals being transition elements, have variable valancies due to which electrons in the valence shell can detach from the orbit. when there is a potential difference between the two ends, electrons flow from higher to lower(conventional current).
They divide the electrons between different branches of the circuit.
Current specifically refers to the movement electrons through an electric conductor. Electricity is a more general term.