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Is the current in intrinsic semiconductos du to fre electrons or valence electrons and what is the diff between them?
Wiki User
∙ 16y ago
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.
Wiki User
∙ 16y ago
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Why are parallel circuits considered current dividers?
They divide the electrons between different branches of the circuit.
What is the difference between the current and electricity?
Current specifically refers to the movement electrons through an electric conductor. Electricity is a more general term.
What causes current to flow what makes it do this?
the basic cause of current flow is the movement of electrons ,basically when some potential difference is applied between any two terminal of a wire electrons will flow from low potential to higher potential because of the negative charge possessed by them , further rate of flow of chargei.e., electrons correspond to the electric current with respect to time.
What measures the volume of electrons through a circuit?
Current measures the flow of electrons through a circuit and voltage basically measure the amount of available electrons.
What is the difference between voltage ang current?
voltage: it is the potentail difference between two wires. or it is the amount of energy used to force the electrons.current: it is the flow of free electrons.by Balaji,NITCAnswerThere is no such expression as 'potential voltage'. 'Voltage' is simply another word for 'potential difference'.
What subatomic particle is most directly related to current electricity?
Electrons are mostdirectlyrelated to electric current. (Electric current is caused by the movement of electrons between atoms.)
When electrons are shared or move between atoms they form what?
current
The movement of electrons between atoms is called an?
electrical current
What is the movement of atoms between electrons?
It is called an electrical current.
Why is the transfer of electrons between atoms important?
It creates current!
What is the effect of temperature on an intrinsic semiconductor?
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.
When is current produced?
current is produced when there exists a potential difference between two points and d electrons move between these points.
What is the movement of electrons between atoms is called?
It is called an electrical current.
What is the difference between filament current and tube 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.
Why the temperature increases as current increases?
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.
Do protons travel through an electric circuit at or near the speed of light?
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.
What happens to the electrons in a conductor when there is a potential difference between the conductor's ends?
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.
