Thank you. I remember getting this shoulder ache from the right hand rule at school, our teacher didn't mention we should use the left hand for the electrons, so I'd invariably end up with my head upside down. It was such a relief when I eventually found out the marvelous secret power of the left hand rule ....😃
Great video as always, I think that if the charges are negative, the current flow in the opposite direction and so the left hand should point in the opposite direction too. So the force IxB would be directed up, making the top side negatively charged. (otherwise would not be possible to understand if they charges are negative or positive because in any case we would get positive charges at top).
I think the motion of the electrons should be used with top being negative to keep it simple. I think for this example to be correct the valence electrons (conduction electrons move left, conventional current moves right force is up in both cases) move right and thus the valence electrons have a force down. We need to be clear about majority carriers which is a bit complicated. Please DO correct my ignorance, I am just a novice.
Michael I am bit confused in this topic I have study this topic in two different book one is resnik haliday kren and last one is resnik haliday walker in both books figure showing a conducting slab placing in a megnatic field that field is inwards and a charge is showing in a conductor moving upside of the conductor and deflected by megnetic filed in the direction of right side but how is this possible it should be deflected in left side according to right hand rule . And another question was that in both books I have readen ° no matter what is the sign of the charge both deflects in same direction but how is this possible what about Fleming's left hand rule that rule by which we can find the direction of force on a charged particle and according to this rule force always act in oposite direction for positive and negative charges
How can you determine what type of charge it is? Even if its a negative charge the electric field produced has the same direction just as it does with positive charge? Am i wrong?
Can the positive charges in a conductor actually move ? I think that the negative charges should be in the upperside. They are the moving charges. So all we should have is more negative charges in the upperside and that why we can mesure a dV. Am i wrong ? I may be and thats why i would really like to know what you think. Thank you
In theory we can have positive charges moving and negative charges moving. A long time ago, we set up the convention of positive charges moving and most text books still hold to that convention. We know off course that only negative charges can move. But in the end it makes no difference at all, and there are a lot of reasons why we maintain that convention.
Michel van Biezen thank you for your answer but i think it makes a difference because if you think about this problem with your left hand ( negative charges ), you find out that negatives charges are pushed up, but if you think bout it with your right hand ( positive charges ) positive charges are pushed up. Thats the part that i dont understand. Thank you again for your answer i didn't you would answer that quick
@@MichelvanBiezen But if for example positive ions move through a liquid in laminar flow can u then consider it as a current? i know about current in wires that it is the electrons moving but just wondering if u could have currents with flowing liquids with ONLY kations
Thanks for your videos, they're very useful for all of us. Anyway I have a doubt, the electric field created by the polarization of the conductor shouldn't force positive charges to move downwards again? So how can be present a permanent difference in voltage at the end? Thank you again
I wouldn't call it incorrect. Probably a misinterpretation when a negative result is obtained. Note that if you plug in negative charges instead of positive charges you will get a negative answer instead of a positive answer. But since you cannot have a negative number, we should than realize that we need to plug in the magnitude of the charge (and ignore the sign).
Thank you. I remember getting this shoulder ache from the right hand rule at school, our teacher didn't mention we should use the left hand for the electrons, so I'd invariably end up with my head upside down. It was such a relief when I eventually found out the marvelous secret power of the left hand rule ....😃
😂😂😂
Great video as always, I think that if the charges are negative, the current flow in the opposite direction and so the left hand should point in the opposite direction too. So the force IxB would be directed up, making the top side negatively charged. (otherwise would not be possible to understand if they charges are negative or positive because in any case we would get positive charges at top).
You probably already found out the answer, if not please read my recent comment and you may need to dig deeper into semiconductors.
great video, was looking for how to predict the hall potential and could easily understand it through every step
The solidified my understanding. Thank you.
Thank you for very good explanation
Thanks sir! You just saved my day. :)
i have a question......whats the trick that makes ur every leacture awesome ? u r epic....man
The Michel van Biezen effect
I think the motion of the electrons should be used with top being negative to keep it simple. I think for this example to be correct the valence electrons (conduction electrons move left, conventional current moves right force is up in both cases) move right and thus the valence electrons have a force down. We need to be clear about majority carriers which is a bit complicated. Please DO correct my ignorance, I am just a novice.
By concention we use positive charges moving as current, when we realize of course that it is the negative electrons that are doing the moving.
you are really awesome sir..!thanx a lot!
Michael I am bit confused in this topic I have study this topic in two different book one is resnik haliday kren and last one is resnik haliday walker in both books figure showing a conducting slab placing in a megnatic field that field is inwards and a charge is showing in a conductor moving upside of the conductor and deflected by megnetic filed in the direction of right side but how is this possible it should be deflected in left side according to right hand rule . And another question was that in both books I have readen ° no matter what is the sign of the charge both deflects in same direction but how is this possible what about Fleming's left hand rule that rule by which we can find the direction of force on a charged particle and according to this rule force always act in oposite direction for positive and negative charges
How can you determine what type of charge it is? Even if its a negative charge the electric field produced has the same direction just as it does with positive charge? Am i wrong?
If the charge was negative, the force would be pointing downward (instead of upward).
@@MichelvanBiezen Thank you for the quick response
Can the positive charges in a conductor actually move ? I think that the negative charges should be in the upperside. They are the moving charges. So all we should have is more negative charges in the upperside and that why we can mesure a dV. Am i wrong ? I may be and thats why i would really like to know what you think. Thank you
In theory we can have positive charges moving and negative charges moving. A long time ago, we set up the convention of positive charges moving and most text books still hold to that convention. We know off course that only negative charges can move. But in the end it makes no difference at all, and there are a lot of reasons why we maintain that convention.
Michel van Biezen thank you for your answer but i think it makes a difference because if you think about this problem with your left hand ( negative charges ), you find out that negatives charges are pushed up, but if you think bout it with your right hand ( positive charges ) positive charges are pushed up. Thats the part that i dont understand. Thank you again for your answer i didn't you would answer that quick
yass elbo and that's why It's indifferent i guess
@@MichelvanBiezen But if for example positive ions move through a liquid in laminar flow can u then consider it as a current? i know about current in wires that it is the electrons moving but just wondering if u could have currents with flowing liquids with ONLY kations
@@tiktokcompilations7246 ua-cam.com/video/XYzm4SbG2rs/v-deo.html
Thanks for your videos, they're very useful for all of us. Anyway I have a doubt, the electric field created by the polarization of the conductor shouldn't force positive charges to move downwards again? So how can be present a permanent difference in voltage at the end? Thank you again
The polarization only partially offsets the original electric field. The net force remains in the same direction.
Sir, why does sometimes there is a negative sign on the n = JB/qE
Since n represents the number of charges, it cannot be a negative number, since you cannot have a negative quantity of anything.
@@MichelvanBiezen Oh, so the formula I've seen is incorrect. Now I know. Thank you Sir!
I wouldn't call it incorrect. Probably a misinterpretation when a negative result is obtained. Note that if you plug in negative charges instead of positive charges you will get a negative answer instead of a positive answer. But since you cannot have a negative number, we should than realize that we need to plug in the magnitude of the charge (and ignore the sign).
@@MichelvanBiezen Okay, Sir. Thanks again.