sir,u just made this concept 100 times clearer...

"I touch pieces of apparatus and they break down" I can relate, so hard.

0:24 the Lorentz force: A magnetic field bends the current. 1:40 the question posted by Edwin Hall 4:00 It's not the voltage down the wire. It's the voltage across the wire. 4:34 the use of Hall Effect

Best explanation on youtube

This finally explains the Monty Hall problem for me, thanks!

I wish I had a teacher like him.

If only my professors had the ability to explain stuff as beautiful as this gentleman here.

"I touch pieces of apparatus and they break down". Glad to know I'm not alone in this...

Sirs, you're ab-so-lu-te-ly BRILLIANT!! I can't stop watching this "sixtysymbols" series! Addictive! Thanks for the excellent job!

Lots of people know lots of stuff about lots of things, but only a few have the gift of passing on that knowledge in a concise way that can be easily understood. Thanks much for the great explanation professor.

You guys are great in that you make this sort of vital information simple for anyone's understanding. And just as importantly it seems you are doing something you enjoy thoroughly and comes naturally. Bravo and thank you.

Thank you professor, you simplify the explanation of Hall effect by making it quite interesting and understandable

I've been playing with brushless motors recently... so it's nice to find out what that Hall effect sensor is actually doing. :)

I knew about the hall sensor - that is was for detecting magnetism, but now I know how it works. Thanx!

I'm an electronic engineering student (1st year UG). I've used a PIC microcontroller with a Hall Effect sensor to measure the RPM of a rotating shaft (about a year ago). I think back then I would have benefitted from such an easy to understand explanation - it would have saved me from a lot of headaches! A very interesting video as per usual - the enthusiasm and friendliness of the professors’ is what makes this channel so great! Many thanks to Brady also. Thanks.

That little demonstration was really useful. Puts the theory into context.

I like the way Professor Bowley explained the problem. He must be an incredible lecturer. Thank you

Sir, that was absolutely brilliant. You have explained to me what my textbook has failed to do for the past two days in just over six minutes.

my man bowley is a physics king. thanks professor, that really helped to understand and visualise the effect

Having worked in a thermoelectric materials lab, the Hall effect is a very important metric to have! And now working on cars, Hall effect sensors are used all over the place, so this is a very useful video to help explain to customers why their speedometer isn't working or whatever! Thank you ❤

Thank you so much. It could not have been explained any clearer.

Marvelous and easy to understand. Now I know what the Hall Effect is! Thanks for yet another wonderful video!

Finally, the video I was looking for! Thank you so much for explaining this so well!!!

This is a very clear and interesting explanation! Thanks so much for this.

When I was in the robotics game, we used brushless DC motors with Hall-effect sensors, known simply as "halls".

Clear message, clear structure, easy to understand, thank you

finally a video that clearly explains the hall effect to me, I really loved this!

Professor Bowley would be a greate teacher for basic (or advanced) electronics courses; it's really great how he can explain correct, significant and still in a way that is easy do understand.

Excellent explanation. I've used them for years, never quite had a handle on how they worked.

This is what I wish they showed me in physics 12 =) thank you Sixty Symbols I love you guys for this.

This is a great video. Very nice explanation. Thank you so much. This really helps me to understand this topic.

A really excellent explanation and demonstration by a first-rate teacher.

I've been spelling it "Hail effect" all this time. I guess I should throw away all my notes now.

We use this for measuring RPM . Several small magnets are attached to shaft so that they pass by a Hall Effect sensor when the shaft is turning and we count the pulses generated by the sensor. There are other ways of measuring RPM, of course, but this method is cheap, reliable, and essentially frictionless.

Thank you for these videos... They often help to illustrate and make more memorable some dull classes in A Level Physics. :)

Thank you for that illustrious explanation

@chrisofnottingham It's also used in brushless motors as a feedback mechanism so that the controller can switch on the right coil at the right place at the right time when a rotor magnet passes over it.

This saved my life! Best explanation ever!

The best explanation of Hall effect ever !!!

alarm door switches are normally just that, a switch (called a reed switch) hall effect sensors are used more in cars to detect the crank angle, or another fast moving magnet (as reed switches wont work fast or accurate enough, and reluctance type sensors are large and prone to noise)

thanks, i just remembered the Hall effect!

I wish I had a teacher like you...Thanks a million

Professor Bowley, I wish you'd be my best friend. Watching you teach makes me happy.

Fantastic explanation, sir. Cheers!

Finally, someone who can explain it clearly. thanks!

Beautifully explained

Thank you sir. What my sir couldn't make us understood in 2 years, you did that in 6 minutes.

Great explanation - thank you.

Dude you just explained to me how the Inductor works. MANY thanks!

Physics homework done! Thank you so much this is really helpful and much easier to understand than the text in my school book:)

Great explanation. Thank God for the Internet. This professor has a passion for teaching - the not so good academics who seem to derive pleasure from making things seem 'harder' than they are... :-)

Great explanation, thank you so much!

Omg this really helped me where I have some doubts Very well explained 👏👏

Very clear explanation. Thank you, sir!

I just fell in love. Thank you Doc.

Explains everything, thankyou very much!

I really like the simple explanations. :)

these are used in sensors in many applications including most cars and machinery. They are called hall effect sensors. eg. crank angle sensor, proximity sensor, speed sensors, linear and rotary decoders

Excellent explanation sir.

thanks professor bowley

Very well explained! Keep it up!

More of Professor Bowley please 😊

Another great thing about the Hall effect is that it was used to discover which particle actually moves in an electric current. In a wire, a flow of positive charges moving in one direction is indistinguishable from a flow of negative charges in the other. With the Hall effect, the charge buildup on the sides of the wire will be opposite depending on which charge is moving. This effect is the reason we know that electicity is due to electrons moving instead of protons.

There’s been some developments on muon catalyze fusion using the hall effect And you can use to Hall effect control plasma to control the electron holes the positive and negative ions in the way the electrons line up with the positive negative ions and holes

Really cool, just got my idea for my advance lab technique term project.

I wish I had these videos when I was in high school. If I was a science teacher I would definitely show them to my classes.

Resistance is voltage over current not voltage times current. It's a mistake that I make sometimes too. I always enjoy the sixty symbols videos. Keep them coming.

nice and clear explanation..

It is also often used to measure rotational velocity or rotational position in various things. If there is something like the teeth on a cog or a shaft with a non uniform cross-section then a Hall effect sensor will give a varying reading as the thing rotates. This can be filtered and counted to give a speed or position. Advantages of this are that it is non contact method and also it continues to work in dirty environments when optical methods might be unsuitable.

Awesome video, super interesting!

@guitarfish83 A lot of great inventions use this effect. Measuring the rotation speed of a wheel, used for anti lock brake systems or frictionless speedometers on bicycles. The joysticks used in cranes or the analog controllers for video-games. Also it allows you to build instruments that measure the magnetic flux leakage which is handy for technicians to check the structural integrity of pipelines without having to dig them up or breaking walls. It's pretty useful. ;-)

@flux1969 No. That's a ferrite block which adds some parasitic inductance to the lead to prevent high frequency signals either from escaping from the monitor or getting into it from the outside and causing interference.

@mcjhn The origin of the force on the current-carrying wire is the Lorenz force. Each moving electron that makes up the current experiences a Lorenz force, (the force that bends the path of the charge in the video) and the forces on each electron add up to give a net force on the wire which is proportional to the current times the strength of the magnetic field. The force is maximum when the wire lies perpendicular to the magnetic field. The Lorentz force is the common feature.

very educative. Thank you Regards

Really this so helpful to me to understand concept about vtg and current by hall effect.( Sir you are really best to explain any concept

You are correct todiwan. Conductive materials like metal have an interesting material property where electrons sort of just "float" around in the material and can thus be pushed around within the material (which is why they are conductive) The positive charge is the "absence" of all the electrons (it's positive relative to the more negative side).

thanks , best video that explain the hall effect....

Sir you have charisma you can teach students like no one else

Thank you!! Best explanation!

Matter of fact, the Hall Effect is used in several modern automotive technologies such as the camshaft sensor, crankshaft sensor, and the Anti-Lock brake system.

I enjoy your explanations, Professor. The Hall Effect was unknown to me. At about 4:40, you mentioned that apparatuses often go hay wire when you use them. In uncertain circles,we call this the (Wolfgang)Pauli Effect. How about doing a presentation on it?

this helped me understand my crankshaft position sensor for my vehicle......recent problem! thanks! i recently put in a NEW (but bad) CKP sensor and its apparently shorted internally- screwing up my fuel level gauge, ignition coil/ignitor(?) and setting off a host of other selonoids- et al! I cleaned all grounds, rebuilt my fuse box, new ECU, cleaned everything........no changes UNTIL i just now decided to swap back in the old CKP sensor. All the electrical clicking, etc went away immediately and Im not going thru the KEY RELEARN process for the new ECU

@mcjhn I loved the experiment as well. The idea came from the Feynman lectures and I used to do it in a lecture when there were demonstration benches in the lecture theatre. But videos with the word `work' in the title are not popular--- I'm beginning to understand why.

what a teaching.. Thanks so much sir

Awesome, learned something new :) thanks again sixtysymbols :D

@kristijan0kroflin Charge is a State, which is not dependend on other quantities, SI-Base System defines 7 units (see wikipedia for International System of Units, the one used in "Science" most of the time), one of which is Ampere (Electric Current, (which can be derived from moving Charges through a Surface (so C(Coulomb)/m^2(Square meters)). The thing is things depend on each other, so you can express it in different forms and they still mean the exact same thing, just in different quantities.

That bit about theoreticians causing apparatus to fall to bits is absolutely true - I can recall quite a few funny stories to that effect...

"But it's nothing to do with the Ohm's Law, this is the Hall Effect" reminds me of the commercial "This is not just food, this is M&S food" lol

Thank you. Nice explanation. But, I didn't understand that how will a positive charge get induced on the other side of the metal ?

Don't forget one of the bigger uses of the Hall Effect. It's used as a sensor in cars to detect the rotation of the spark rotor.

Would you do a video on the Hall Effect thruster? Thank you for this, by the way.

A good every-day example for Hall effect sensors is in joysticks. The oldest joysticks were digital, meaning they basically pushed down a button when you moved the stick, kind of like on a modern controller's D-Pad. Then they started using analog potentiometers, which let current through based on how much of two metal surfaces are touching each other. Problem there is the metal wears out, gets dirty, or oxidizes. Now they're starting to use Hall sensors and permanent magnets; no degrading!

"Plan(c)k length" and then "Hall effect"... this professor is onto something!

I always loved those things!

Really helpful video Thanks al ot gonna need this for my physics finals

Thanks for the explanation. I still don't yet understand, but that helped.

cool :) i love listening to good teachers

Sorry to disturb you and I don't know if someone has already said this but the drift velocity is the general velocity of the current. The actual velocities of the electrons are much higher although not all the the same direction at . Some are even going backwards. They also change. Drift velocity is the average of these velocities. Usually quite low. While there are photon transfers between electrons, the cause of a detected current is the actual movement of electrons.

I've had to do even calculations with the hall effect and still had absolutely no idea what the hecc I was doing until I watched this video, nice

@rahkshifan99 he's not bending light, he's bending a stream of electrons, which make a photofluorescent tube glow when they hit it, the light is no there when it's bend. (This is used in Old CRT Monitors, you got a stream of electrons and when they hit the screen making it glow in different colors, producing the image on the screen.)