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Does a semiconductor follow Ohm's law?
Does a diode really follow Ohm's Law?Is Ohm's Law violating itself?Ohm's law clarificationbrief explanation of Ohm's lawOhm's Law confusion — can there be voltage without current?Why are these readings violating ohm's law? (Are they?)Can a battery produce more amperes as per Ohm's law?High voltage transmission, transformers and Ohm's lawDoes a diode really follow Ohm's Law?General definiton of Ohm's lawHow do transformer obey Ohm's law?
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$begingroup$
Ohm's law is valid for metals, but is it valid for semiconductors? Does it work there?
I am not talking about a PN junction here.
If I have a block of silicon and pass voltage across it, will I see current flowing, in accordance with Ohm's law?
semiconductors ohms-law
New contributor
$endgroup$
add a comment |
$begingroup$
Ohm's law is valid for metals, but is it valid for semiconductors? Does it work there?
I am not talking about a PN junction here.
If I have a block of silicon and pass voltage across it, will I see current flowing, in accordance with Ohm's law?
semiconductors ohms-law
New contributor
$endgroup$
$begingroup$
Yes. In fact, the very first chapter of any book on microelectronics starts out at the beginning analyzing semiconductor behavior with the assumption of the Drude model and the application of Ohm's Law (though you'd have to put some of the equations together to produce Ohm's law, since they will be using volts/meter, usually.)
$endgroup$
– jonk
2 hours ago
$begingroup$
You would need a block of silicon doped with either a N-type or P-type to make it a conductor. Silicon on it's own wouldn't conduct current because there is no transfer of electrons/holes.
$endgroup$
– Rajesh S
8 mins ago
add a comment |
$begingroup$
Ohm's law is valid for metals, but is it valid for semiconductors? Does it work there?
I am not talking about a PN junction here.
If I have a block of silicon and pass voltage across it, will I see current flowing, in accordance with Ohm's law?
semiconductors ohms-law
New contributor
$endgroup$
Ohm's law is valid for metals, but is it valid for semiconductors? Does it work there?
I am not talking about a PN junction here.
If I have a block of silicon and pass voltage across it, will I see current flowing, in accordance with Ohm's law?
semiconductors ohms-law
semiconductors ohms-law
New contributor
New contributor
edited 1 hour ago
Hearth
5,28011340
5,28011340
New contributor
asked 2 hours ago
Shaona BoseShaona Bose
1113
1113
New contributor
New contributor
$begingroup$
Yes. In fact, the very first chapter of any book on microelectronics starts out at the beginning analyzing semiconductor behavior with the assumption of the Drude model and the application of Ohm's Law (though you'd have to put some of the equations together to produce Ohm's law, since they will be using volts/meter, usually.)
$endgroup$
– jonk
2 hours ago
$begingroup$
You would need a block of silicon doped with either a N-type or P-type to make it a conductor. Silicon on it's own wouldn't conduct current because there is no transfer of electrons/holes.
$endgroup$
– Rajesh S
8 mins ago
add a comment |
$begingroup$
Yes. In fact, the very first chapter of any book on microelectronics starts out at the beginning analyzing semiconductor behavior with the assumption of the Drude model and the application of Ohm's Law (though you'd have to put some of the equations together to produce Ohm's law, since they will be using volts/meter, usually.)
$endgroup$
– jonk
2 hours ago
$begingroup$
You would need a block of silicon doped with either a N-type or P-type to make it a conductor. Silicon on it's own wouldn't conduct current because there is no transfer of electrons/holes.
$endgroup$
– Rajesh S
8 mins ago
$begingroup$
Yes. In fact, the very first chapter of any book on microelectronics starts out at the beginning analyzing semiconductor behavior with the assumption of the Drude model and the application of Ohm's Law (though you'd have to put some of the equations together to produce Ohm's law, since they will be using volts/meter, usually.)
$endgroup$
– jonk
2 hours ago
$begingroup$
Yes. In fact, the very first chapter of any book on microelectronics starts out at the beginning analyzing semiconductor behavior with the assumption of the Drude model and the application of Ohm's Law (though you'd have to put some of the equations together to produce Ohm's law, since they will be using volts/meter, usually.)
$endgroup$
– jonk
2 hours ago
$begingroup$
You would need a block of silicon doped with either a N-type or P-type to make it a conductor. Silicon on it's own wouldn't conduct current because there is no transfer of electrons/holes.
$endgroup$
– Rajesh S
8 mins ago
$begingroup$
You would need a block of silicon doped with either a N-type or P-type to make it a conductor. Silicon on it's own wouldn't conduct current because there is no transfer of electrons/holes.
$endgroup$
– Rajesh S
8 mins ago
add a comment |
1 Answer
1
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$begingroup$
Yes. All materials under normal conditions follow ohm's law, though it becomes less useful in good insulators where breakdown occurs before any substantial amount of current can flow.
Non-ohmic effects occur at boundaries between different materials, such as pn junctions, schottky junctions, thermocouples, electrochemical cells, et cetera. They can also be observed in discharge phenomena, where the flow of current causes ionization and chemical changes in the conducting material.
Edit: it's worth mentioning that the presence of (changing) magnetic fields can complicate things. Transformers and inductors are not generally considered to obey ohm's law under dynamic conditions, for instance.
For further information on where it gets murky, see this question.
$endgroup$
$begingroup$
To be accurate, I'd phrase it "nearly all materials under normal conditions closely approximate Ohm's law". As engineers, we tend to separate the exceptions into nicely explained phenomena, such as resistance change due to heating, or thermoelectric effects, or rectification, etc., etc., etc. If you're going into a 16-bit ADC, then in general you only just barely start to worry. If you're going into a 24-bit ADC and the last eight aren't just there to boost your ego, then worry.
$endgroup$
– TimWescott
2 mins ago
add a comment |
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$begingroup$
Yes. All materials under normal conditions follow ohm's law, though it becomes less useful in good insulators where breakdown occurs before any substantial amount of current can flow.
Non-ohmic effects occur at boundaries between different materials, such as pn junctions, schottky junctions, thermocouples, electrochemical cells, et cetera. They can also be observed in discharge phenomena, where the flow of current causes ionization and chemical changes in the conducting material.
Edit: it's worth mentioning that the presence of (changing) magnetic fields can complicate things. Transformers and inductors are not generally considered to obey ohm's law under dynamic conditions, for instance.
For further information on where it gets murky, see this question.
$endgroup$
$begingroup$
To be accurate, I'd phrase it "nearly all materials under normal conditions closely approximate Ohm's law". As engineers, we tend to separate the exceptions into nicely explained phenomena, such as resistance change due to heating, or thermoelectric effects, or rectification, etc., etc., etc. If you're going into a 16-bit ADC, then in general you only just barely start to worry. If you're going into a 24-bit ADC and the last eight aren't just there to boost your ego, then worry.
$endgroup$
– TimWescott
2 mins ago
add a comment |
$begingroup$
Yes. All materials under normal conditions follow ohm's law, though it becomes less useful in good insulators where breakdown occurs before any substantial amount of current can flow.
Non-ohmic effects occur at boundaries between different materials, such as pn junctions, schottky junctions, thermocouples, electrochemical cells, et cetera. They can also be observed in discharge phenomena, where the flow of current causes ionization and chemical changes in the conducting material.
Edit: it's worth mentioning that the presence of (changing) magnetic fields can complicate things. Transformers and inductors are not generally considered to obey ohm's law under dynamic conditions, for instance.
For further information on where it gets murky, see this question.
$endgroup$
$begingroup$
To be accurate, I'd phrase it "nearly all materials under normal conditions closely approximate Ohm's law". As engineers, we tend to separate the exceptions into nicely explained phenomena, such as resistance change due to heating, or thermoelectric effects, or rectification, etc., etc., etc. If you're going into a 16-bit ADC, then in general you only just barely start to worry. If you're going into a 24-bit ADC and the last eight aren't just there to boost your ego, then worry.
$endgroup$
– TimWescott
2 mins ago
add a comment |
$begingroup$
Yes. All materials under normal conditions follow ohm's law, though it becomes less useful in good insulators where breakdown occurs before any substantial amount of current can flow.
Non-ohmic effects occur at boundaries between different materials, such as pn junctions, schottky junctions, thermocouples, electrochemical cells, et cetera. They can also be observed in discharge phenomena, where the flow of current causes ionization and chemical changes in the conducting material.
Edit: it's worth mentioning that the presence of (changing) magnetic fields can complicate things. Transformers and inductors are not generally considered to obey ohm's law under dynamic conditions, for instance.
For further information on where it gets murky, see this question.
$endgroup$
Yes. All materials under normal conditions follow ohm's law, though it becomes less useful in good insulators where breakdown occurs before any substantial amount of current can flow.
Non-ohmic effects occur at boundaries between different materials, such as pn junctions, schottky junctions, thermocouples, electrochemical cells, et cetera. They can also be observed in discharge phenomena, where the flow of current causes ionization and chemical changes in the conducting material.
Edit: it's worth mentioning that the presence of (changing) magnetic fields can complicate things. Transformers and inductors are not generally considered to obey ohm's law under dynamic conditions, for instance.
For further information on where it gets murky, see this question.
edited 2 hours ago
answered 2 hours ago
HearthHearth
5,28011340
5,28011340
$begingroup$
To be accurate, I'd phrase it "nearly all materials under normal conditions closely approximate Ohm's law". As engineers, we tend to separate the exceptions into nicely explained phenomena, such as resistance change due to heating, or thermoelectric effects, or rectification, etc., etc., etc. If you're going into a 16-bit ADC, then in general you only just barely start to worry. If you're going into a 24-bit ADC and the last eight aren't just there to boost your ego, then worry.
$endgroup$
– TimWescott
2 mins ago
add a comment |
$begingroup$
To be accurate, I'd phrase it "nearly all materials under normal conditions closely approximate Ohm's law". As engineers, we tend to separate the exceptions into nicely explained phenomena, such as resistance change due to heating, or thermoelectric effects, or rectification, etc., etc., etc. If you're going into a 16-bit ADC, then in general you only just barely start to worry. If you're going into a 24-bit ADC and the last eight aren't just there to boost your ego, then worry.
$endgroup$
– TimWescott
2 mins ago
$begingroup$
To be accurate, I'd phrase it "nearly all materials under normal conditions closely approximate Ohm's law". As engineers, we tend to separate the exceptions into nicely explained phenomena, such as resistance change due to heating, or thermoelectric effects, or rectification, etc., etc., etc. If you're going into a 16-bit ADC, then in general you only just barely start to worry. If you're going into a 24-bit ADC and the last eight aren't just there to boost your ego, then worry.
$endgroup$
– TimWescott
2 mins ago
$begingroup$
To be accurate, I'd phrase it "nearly all materials under normal conditions closely approximate Ohm's law". As engineers, we tend to separate the exceptions into nicely explained phenomena, such as resistance change due to heating, or thermoelectric effects, or rectification, etc., etc., etc. If you're going into a 16-bit ADC, then in general you only just barely start to worry. If you're going into a 24-bit ADC and the last eight aren't just there to boost your ego, then worry.
$endgroup$
– TimWescott
2 mins ago
add a comment |
Shaona Bose is a new contributor. Be nice, and check out our Code of Conduct.
Shaona Bose is a new contributor. Be nice, and check out our Code of Conduct.
Shaona Bose is a new contributor. Be nice, and check out our Code of Conduct.
Shaona Bose is a new contributor. Be nice, and check out our Code of Conduct.
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$begingroup$
Yes. In fact, the very first chapter of any book on microelectronics starts out at the beginning analyzing semiconductor behavior with the assumption of the Drude model and the application of Ohm's Law (though you'd have to put some of the equations together to produce Ohm's law, since they will be using volts/meter, usually.)
$endgroup$
– jonk
2 hours ago
$begingroup$
You would need a block of silicon doped with either a N-type or P-type to make it a conductor. Silicon on it's own wouldn't conduct current because there is no transfer of electrons/holes.
$endgroup$
– Rajesh S
8 mins ago