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Conduction refers to electrons or, "holes" in the case of semiconductors, which are conducted, under the influence of an electric field, from one place to another. However, in semiconductor there is a phenomenon called "drift current" which is more a function of very small field and random motion from one place, within the material, to another place. But neither of these is ever referred to as a "convection" current. The term "convection" is used in connection with air currents moved by differences in temperature between one place and another. Hot air tends to rise while cold air tends to fall. Consequently, a circulation of air, due to temperature is called a convection current.
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What is the difference between emitter and conductor?
A: BIG DIFFERENCE emitting is the study of electronics conduction is the study of current flow
What allows current to pass in an AC circuit in spite the presence of dielectric in the capacitor?
There are two types of electric current: 'conduction current' and 'displacement current'. Normal current flow, for example, electron flow in a metal conductor, is an example of 'conduction current'.'Displacement current' takes place within dielectrics, such as the dielectric that separates the plates of a capacitor. When a potential difference is applied across a dielectric, the majority of electrons cannot move as they are tied to their individual atoms. However, the shape of the electron orbits around their nucleii, become distorted or elongated ('polarised'), with their 'negative centre' attracted towards the external positive potential, and their 'positive centre' attracted towrds the external negative potential. Whenever the magnitude of the external potential difference changes, so too does the amount of distortion of the electron orbits. We call this a 'displacement current', and it only occurs when the potential difference applied to the dielectric changes. As a.c. potential difference is continually changing in magnitude and direction, so too does the resulting displacement current.So, when we apply a.c. voltage to a capacitor, a displacement current takes place within the dielectric, while a conduction current takes place around the external circuit.
3 what is the relation between gate current and anode current of thyristor in conduction period?
In the conduction period of a thyristor, the gate current is used to trigger the device into conduction, but once the thyristor is latched on, it remains conducting primarily due to the anode current. The gate current effectively initiates the conduction process by allowing a small amount of charge to flow, but the anode current, which is typically much larger, sustains the conduction. After the thyristor is turned on, the gate current can be removed, and the anode current continues to flow until the device is turned off by reducing the current below a certain holding value.
Does current actually flow through a capacitor?
No. Current (or more specifically, charge) flows into one plate, and an opposing current (charge) flows out of the other plate, but the current (except for leakage current) does not flow across the dielectric. The result is that there is a charge differential between the plates.
What is produced first current or voltage?
current flows as a result of potential difference i.e. in a circuit if there is no voltage difference between two points, no current can flow between those two points. So voltage has to be produced first.
What are Conduction Current Density and Displacement Current Density?
We know specifically the definition of current density as current flow through a surface of unit area. Conduction current is the current through the conductors in the presence of electrostatic fields and displacement current is the current flow due to time varying electric fields
What is the difference between emitter and conductor?
A: BIG DIFFERENCE emitting is the study of electronics conduction is the study of current flow
How current flow through capacitor?
There are two types of electric current, termed 'conduction current' and 'displacement current', respectively.A 'conduction current' describes the drift of free electrons in a metal conductor. A 'displacement current' describes the polarisation of atoms in dielectrics.When an electric field is applied to a dielectric, the elliptical orbits of the electrons around each atom's nucleus become distorted, and stretch, resulting in polarised atoms. The amount of 'stretch' (polarisation) increases with the strength of the electric field. So, as the voltage across the changes so, too, does the amount of polarisation -i.e. so, too, does the displacement current.So when a capacitor is connected to an external d.c. supply, a varying conduction current drifts around the circuit conductor, while a displacement current occurs within the capacitor's dielectric. When a capacitor is connected to an external a.c. supply, a continuously varying potential difference results in a continuously changing conduction current in the metallic circuit, and a continuously changing displacement current within the capacitor's dielectric.
What allows current to pass in an AC circuit in spite the presence of dielectric in the capacitor?
There are two types of electric current: 'conduction current' and 'displacement current'. Normal current flow, for example, electron flow in a metal conductor, is an example of 'conduction current'.'Displacement current' takes place within dielectrics, such as the dielectric that separates the plates of a capacitor. When a potential difference is applied across a dielectric, the majority of electrons cannot move as they are tied to their individual atoms. However, the shape of the electron orbits around their nucleii, become distorted or elongated ('polarised'), with their 'negative centre' attracted towards the external positive potential, and their 'positive centre' attracted towrds the external negative potential. Whenever the magnitude of the external potential difference changes, so too does the amount of distortion of the electron orbits. We call this a 'displacement current', and it only occurs when the potential difference applied to the dielectric changes. As a.c. potential difference is continually changing in magnitude and direction, so too does the resulting displacement current.So, when we apply a.c. voltage to a capacitor, a displacement current takes place within the dielectric, while a conduction current takes place around the external circuit.
Can a displacement current be measured with an ammeter expain?
Displacement current can not be measured by ammeter because it is the current which produce between the plate (space)due to change of electric flux and it is directly proportional to the rate of change of electric flux.
How do you flow current in capacitor through dielectric?
well actually current doesn't exactly pass through the capacitor or dielectric.Current just flows through the wires connected to the capacitor.The reason is that electric charges are only placed onto capacitor plates and they flow in the circuit and it seems to us that current is flowing in the circuit.Also remember that dielectric only increases the capacitance of a capacitor.AnswerThere are two types of electric current, termed 'conduction current' and 'displacement current', respectively.A 'conduction current' describes the drift of free electrons in a metal conductor. A 'displacement current' describes the polarisation of atoms in dielectrics.When an electric field is applied to a dielectric, the elliptical orbits of the electrons around each atom's nucleus become distorted, and stretch, resulting in polarised atoms. The amount of 'stretch' (polarisation) increases with the strength of the electric field. So, as the voltage across the changes so, too, does the amount of polarisation -i.e. so, too, does the displacement current.So when a capacitor is connected to an external d.c. supply, a varying conduction current drifts around the circuit conductor, while a displacement current occurs within the capacitor's dielectric. When a capacitor is connected to an external a.c. supply, a continuously varying potential difference results in a continuously changing conduction current in the metallic circuit, and a continuously changing displacement current within the capacitor's dielectric.
What is the difference between conduction and induction?
Conduction is a process of static electricity when energy is able to flow from one object to another when they are touching. Induction is a process of static electricity when energy is able to flow from one object to another without touching.
What is the difference between A current account and a cheque account?
what is difference between a current account and a cheque account
3 what is the relation between gate current and anode current of thyristor in conduction period?
In the conduction period of a thyristor, the gate current is used to trigger the device into conduction, but once the thyristor is latched on, it remains conducting primarily due to the anode current. The gate current effectively initiates the conduction process by allowing a small amount of charge to flow, but the anode current, which is typically much larger, sustains the conduction. After the thyristor is turned on, the gate current can be removed, and the anode current continues to flow until the device is turned off by reducing the current below a certain holding value.
What is the difference between the valence band and the conduction band in a material's electronic structure?
The valence band is the energy band in a material where electrons are normally found, while the conduction band is the energy band where electrons can move freely to conduct electricity. The key difference is that electrons in the valence band are tightly bound to atoms, while electrons in the conduction band are free to move and carry electric current.
Does current actually flow through a capacitor?
No. Current (or more specifically, charge) flows into one plate, and an opposing current (charge) flows out of the other plate, but the current (except for leakage current) does not flow across the dielectric. The result is that there is a charge differential between the plates.
What exist when there is a difference between the current and the desired situation?
A problem is what exists when there is a difference between the current situation and the desired one.
