Piezoelectric Effect Explained using a simple physical model

This video covers how crystals are used to create and receive high frequency sound. Apart from their use in small speakers, they are especially useful in their used of transducers for ultrasound imaging. Using a physical model we review the distortion of the crystal leads to a potential difference which can them be measured
See more Medical imaging techniques here -
• Medical Physics
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[@rosskious7084]

The video is well done and the content is explained at a level easy enough for anyone to understand, but advanced enough to help you in the subject. He starts the subject at a level assuming a extremely elementary knowledge and slowly works up the ladder of knowledge. If you are wondering if this is the video to watch to help you understand the Piezoelectric effect, rest assured that you have found the right video.

[@samarpreetsingh5318]

I have seen around 7 to 8 videos on piezoelectric effect and your one explains it the best. ☺️

[@user-ug8sm7uh4t]

can you help me to finding anything that connects me to the original RAIF technology. disease (metastatic cancer)

[@mushyomens6885]

Holy crap! This is such a brilliant explanation. This channel is so underrated.

[@user-ug8sm7uh4t]

can you help me to finding anything that connects me to the original RAIF technology. disease (metastatic cancer)

[@zakariaelkassmi3904]

Short and organised video! KEEP UP!!!

[@gama6749]

Really helped my understanding of PiZeOLectRic crystals and the EM spectrum overall. Thank you again!!

[@user-ug8sm7uh4t]

can you help me to finding anything that connects me to the original RAIF technology. disease (metastatic cancer)

[@wenwu-xu]

Brilliant!! KZbin has been my best teacher after school... Thanks for your great talk.

[@audiogarden21]

Good for you to take the initiative for you own education.

[@vojtechstoklasa3417]

Khan academy is a good way to go! sry to advertise other educator, but khan academy has covered all high school fields.

[@thorrohde4283]

True story electric aquarium hydrometer.

[@rogerd4559]

are you kidding me? youtube has saved me thousands of dollars avoiding costly mistakes fixing things on my vehicle and other tips. You Tbe videos have taught me far more useful stuff then anything in my school years that most things have turned out to be lies

[@PhysicsHigh]

No problem. It’s what ever helps the student.

[@akatsuki323]

Very informative and simplified explanation!

[@ragin_cajuns]

It really makes sense...very nice explanation,sir.

[@fatemehghezelbash7325]

This explanation is great. I couldn't understand Piezoelectric effect, but after watching this video I completely get it. Thank you very much indeed.

[@ellispress7374]

Thankyou for explaining this topic as it looked so daunting when we were set it as work but now I understand it and am ready for my physics lesson

[@rosalindaabeytia7389]

Excellent explanation, thank you for your time.

[@erzanabakiu577]

perfectly explained ,thank you so much

[@nipun_20]

That is a really good explanation. Thank you so much ❤️❤️❤️

[@LsrhealthcareAu]

Thank you - excellent lesson well presented

[@dimalranasinghe8152]

Thank you very much. Really Appreciate.

[@shibinan4942]

Excellent one👏

[@JohnMmbaga_]

Thanks Paul.Much appreciated...

[@ferlyncaga-anan9203]

Thank you Sir :) well explained!

[@gama6749]

Appreciate you sharing! Mahalo! Very interesting.

[@John-ti8bf]

Thanks Paul, very useful.

[@CheekiAnimations]

You're a life saver sir xD

[@adambuchanan737]

awesome video. thank you :)

[@faridsalari5328]

It is remarkably simple but very useful and effective to learn about piezoelectric fundamentals

[@jamieatkins9136]

these videos are really helpful

[@sonivivek173]

well explained !!!

[@cobaltbomba4310]

Very helpful Sir!

[@bikeman9899]

Excellent!

[@md.morshedurrahman5940]

Excellent. Thank you

[@zainulabdien6719]

Best video on internet explaining piezoelectric effect..appreciated

[@PhysicsHigh]

Thanks

[@LivYi]

Super brilliant explanation!!! I’d really love to see your explanation of thermoelectric materials.

[@user-ug8sm7uh4t]

can you help me to finding anything that connects me to the original RAIF technology. disease (metastatic cancer)

[@DaniiMarie333]

Perfect! I love your teaching style!!! New sub❤

[@PhysicsHigh]

Thanks for your support!

[@user-ug8sm7uh4t]

can you help me to finding anything that connects me to the original RAIF technology. disease (metastatic cancer)

[@eletro_doc9529]

Amazing explanation! Thank you.

[@PhysicsHigh]

Thank you!

[@StaticBlaster]

Thank you sir. I've always had an insatiable appetite for scientific knowledge and KZbin & science kits I buy from Amazon are definitely my go to places for acquiring just that.

[@user-ug8sm7uh4t]

can you help me to finding anything that connects me to the original RAIF technology. disease (metastatic cancer)

[@xuyangli4324]

helps me a lot!!!

[@CommentsOnScience]

Very good, will use for our students.

[@adera3098]

Thankyou for this :)

[@Jediael61]

THANK YOU!!!!!!!

[@desert.mantis]

Excellent explanation, Paul! Thank you. I Wish you were my college physics teacher back in the day...

[@PhysicsHigh]

Happy to help

[@salvadorarroyo3742]

good stuff thanks.

[@syahrilsayuti9243]

Good Video, Thank..

[@tobynewton8436]

This video is so cool

[@abdovitamins6331]

Brilliant

[@mohamadabdelmoniem3873]

Thanks alooooot brilliant

[@amitavamitra9879]

I very much like the presentation

[@pedrohenriquediasdearaujo4661]

Beautiful...

[@bakanobasire1493]

ur explanation is great. you are indeed real teacher, how can i do research on piezoelectricity.

[@darksun4523]

Can we just take a moment to appreciate the 2D moving model 👏🏾. Great explanation for a Highly interesting subject.

[@PhysicsHigh]

Thanks very much.

[@user-ug8sm7uh4t]

can you help me to finding anything that connects me to the original RAIF technology. disease (metastatic cancer)

[@elphaniumlimited3300]

Nice one

[@nukeelda]

I subscribed:) and best explanation about converting sound to emf ,soo now I'm trying to find a way to transfer energy from one place (sound waves) to ring candies in the box (emf) to get energy produced on long distance? :)

[@Competitive_Antagonist]

This is the first compelling science video I was able to understand in a while. So it's not just the organised structure that gives it the piezoelectric effect, it's also the arangement of the charged particles. I've heard that bone is a good piezoelectric material. I'm guessing that's how bone conduction works, as the sound distorts the structure of bone, converting it to electrical signals, then it reaches the 8th cranial nerve which get's processed by the brain as sound. I'm a bit foggy about the mechanics of sound hearing though. The ear seems like a very complicated piece of machinery.

[@PhysicsHigh]

Glad it helped. 👍 Please share with friends if you think they would benefit.

[@rodrigoruz5002]

Hello Paul! My name is Rodrigo Ruz and I am a young scientist from México. Do you think that using PVDF crystal would be a feasible option to produce energy with sound?

[@user-ug8sm7uh4t]

can you help me to finding anything that connects me to the original RAIF technology. disease (metastatic cancer)

[@drvasundhara4297]

Thanks..😊

[@lukegardiner1864]

Awsome video :) what happens to a crystal under continuous pressure?

[@RKroese]

Can you apply pressure from the inside, by a hollow crystal filled with gas?

[@servionblackwood779]

If you had a battery to store ac produced by this effect, then used it as a supply for the same same crystals, what would be your energy lost? Or would it generate more than it lost?

[@pavankalyanimadabathini7875]

hi sir i hope u r video was very useful to everyone to learn the concept but if u don't mind would like to explain me the ultrasonics chapter in detailed with an useful video

[@jollyjokress3852]

Question: When you squeeze the lattice laterally (4:57), do the four "middle" Si+ and O- cancel out their energies so they don't influence the current?

[@thecrazykartbyAJ]

Excellent video, thank you very much!! The explanation in 4:20 has opened my mind... One question here please: I did not understand the reason in putting the negative charges in the upper or lower part of the crystal, and viceversa for the + charges, in the 9:37 minute... Thank you!

[@PhysicsHigh]

Silicon dioxide is slightly polar, that is, the molecule is slightly more positive on one side and negative on the other. Water has similar characteristics. In a normal lattice arrangement, there is no net polarity. However , when distorted then there is a minute polarity on surfaces depending on the stress placed on the crystal.

[@thecrazykartbyAJ]

High School Physics Explained Thank you very much!

[@TheImmortuary]

What happens when you apply a direct current to the Crystal? Does the crystal align itself to the direction of flow?

[@Hasanuzzaman-xp9sy]

it helps

[@GauravSingh-jt3ch]

Can you please explain Ferroelectric and pyroelectric effects with suitable example?

[@anilkumarsharma1205]

unit of piezoelectricity are carge per kilogram per degree celsius per kgf per second square since instantaneous acceleration of forces giving rise the stress of the material which squeezing the electron or give it rectifying?

[@mrbeastwithnomoney]

hello sir !! how much energy we can produce with same setup using vibration in normal day to day life

[@loveliemacasio5116]

is the working principle of transducer in echo sounder and in ultrasound are same?

[@jamesthorpe84]

Is it possible to create sounds in the body? Let's say nanocrystals were ingested in the body. Would directing energy at that site induce sound?

[@ColoradoForestBeings]

Will applying weight on a quartz start a charge too?

[@electronicsmaniac6235]

Thank you Sir. In terms of collecting or harvesting this energy production to charge any rechargeable portable devices, do we need to convert it from AC to DC? There are many energy harvester module sold in the market today but I don't how they are being used or applied

[@binra3788]

If you make one, yes. If the device is a charger - it has that built in.

[@user-ug8sm7uh4t]

can you help me to finding anything that connects me to the original RAIF technology. disease (metastatic cancer)

[@mumtahinahmed3267]

Seems like Professor Snape is taking physics class instead of potions😂.Btw, Great teaching !💞

[@topcatcoast2coast579]

Omg!!! This guy explained this so simpley and elegantly. I understood the phenomenon in minutes.

[@jmestascatcoparco]

thank good :=)

[@ericpham5198]

Actually we can compress one quartz vertical and the other on the horizontal then a dc battery results and we could use it to power device and if we use it to be compress one under total stable with no molecules oscillator and compare to a normal crystal then we get natural crystals frequency of atomic frequency like French measure atomic clock

[@mufaddalkapasi1778]

Plzz make a video on x ray crystallography

[@anugrahapandidurai1548]

can piezoelectric crystals be capable of producing only the alternating current?

[@stivixhako2942]

Hello! Very helpful video. I have a coupe of questions about the argument. Is this phenomenon manifested in a certain scale in every ceramic composition? If it's not, which are the main parameters that make a ceramic composition (crystal) a piezoelectric one?

[@PhysicsHigh]

No it does not manifest in all crystals. In fact, crystals can not have centric symmetry. There are a range of crystals that do show the effect. The effect predominantly is determined by the charge density upon pressure applied and the relative elasticity of the bonds between the atoms

[@stivixhako2942]

Thanks a lot.

[@attackhelicoptercat]

have you considered the possible effects of spinning crystals while applying sound frequencies through them?

[@user-ug8sm7uh4t]

can you help me to finding anything that connects me to the original RAIF technology. disease (metastatic cancer)

[@misterghoul9457]

Could you (theoretically) use something like a ddr mat out of tiles, that use this effect to make electricity, and put that into a back up generator?

[@ZuluSierraPapa]

Cool idea, made any progress on it? haha

[@klemenmlakar96]

Hypothetically speaking, could a very high alternating current deform the lattice in such extent that it would break the Si-O bonds?

[@julmaj1479]

Well I guess it would, as when lightning strikes it actually breaks some bonds in the air causing nitrogen from air to form a new bond with water forming nitric acid.

[@shrinishabhattarai9781]

Is our physical energy used to compress the Crystal in lighter to produce a spark in order to burn the fuel?

[@workhardplayharder4589]

What would happen if we start applying strong magnetic fields to the controlled direction

[@etaogheneorakpoyovwuru2822]

Please, I did this practical experiment. My AC voltage was varying , sometimes, 10V sometimes 2 V. That's not my problem, the problem I'm facing is, the rectifier circuit absorbs all my ac voltage and delivers value of around 0.5V as the DC output, please, what should I do?

[@binra3788]

So if electrical current is generated in crystalline rock in our crust - as a capacitance effect to our electrically varying ionosphere - we have a means for huge pressures to arise from distortion and further electric currents in the Earth?

[@joshplayz474]

I understand the piezoelectric and the inverse piezoelectric effect, but how is a transducer able to do both simultaneously? Like in an ultrasound scan.

[@themistoklespappalas3834]

I'm sorry I'm taking the liberty to intrude for something that's not directly related, this is the only way though to find something that can't find as easily as I thought one could : Are piezoelectric materials 'energized' by way of hydrostatic pressure (changes) of any liquid, off course, but mainly water. Thank you.

[@bdvd100]

The arrows representing the current (electron) flows within the distorted quartz (at 5:13 and 5:50), aren't they pointing in the wrong direction based on the description of the electric field created by compression? The electrons flow would be from the (electron higher density) o- to the (electron lower density) si+. Alternating the compression direction would still generate ac current, just the arrows on both compressions should be reversed.

[@shawncullum8451]

Thank you so much for this! Do you still reply? I am wondering how the crystal converts AC to Sound and visa versa? And why it does not to replicate what is introduced, (why does it not produce AC current when an AC current is introduced?) Thank you

[@user-ug8sm7uh4t]

can you help me to finding anything that connects me to the original RAIF technology. disease (metastatic cancer)

[@8103537]

When deformation takes place as the crystal moves closer to the vertical line how does positive charge build up on top?

[@CandidDate]

I don't know. My guess is the combination of each molecule builds up a small voltage which propagates due to vibration.

[@sabarnya2011]

Why the piezoresistive effect in crystalline Silicon is larger in p type doping than in case of n type doping?

[@CandidDate]

This is a lot like how magnetic and electric forces are generated, only the actual molecules move physically. I wonder if there is any magnetic component to the molecular charge as well? A question for future explorers of the very small.

[@bobbiemorgan5925]

What would happen if this energy was directed at a land mass? Possible effects?

[@chetnapatel9700]

Piezoelectric circuit can it be destroyed by emp jammer?

[@gigagogishvili2901]

Great Video, Thank you, But here is something, I didn't get. Why quarts polarized in minus and plus, in first level, when you pushed on it, up side was one oxygen and down side was two silicon, why top in becomes more positive ? and in other case, why bottom in becomes more negative ?

[@189vans]

Very great question I would also like answered!

[@gigagogishvili2901]

@@189vansHey mate, its because imbalances and because it is not in simetry, top side is very last edge of the point with silicone and bottom side is very last edge of oxygen, so it takes potential different from the surface, lets say like that, and when i levels, it takes the charge that is the most.

[@jasonpinnell5641]

Could this be a potential source of free energy if we were to convert the vibrations from electromagnetic forces into electromagnetically excited acoustic noise, and in turn use massive quartz crystals to transduce that electromagnetically excited acoustic noise's vibration into electrical energy....?

[@jasonpinnell5641]

the electromagnetic forces would be pretty constant (until the end of the universe I guess) so if there were a way to create a tone using chambers of some sort fashioned in such a way that it creates a steady humming tone, one could possibly use that vibration piezoelectrically....

[@mykulpierce]

When was the earliest model of the molecule of quartz known?

[@mykulpierce]

I ask because it looks just like a Star of David. Egyptians were nuts about quartz from which a lot of Jewish culture comes from.

[@cactuarizard]

Wow. Who knew the Merkaba referenced the quartz

[@nivasramachandiran791]

What are the properties a material should have to exhibit piezoelectric effect?

[@PhysicsHigh]

They need to be arranged in crystalline lattice and the molecule needs to be polar so that there is a slight positive charge one end and a slight negative charge the other, when distorted Sorry for the late reply

[@billbob6312]

Very basic , but very good description of whats happening well done . But as with all good descriptions of whats happening it failed to explain what was happening. . I find our modern education system is very good at descriptions of whats happening without ever explaing why .

[@PhysicsHigh]

That is intentional. The video originally is intended to cover the NSW physics syllabus and is high School oriented. To go deeper, explaining why it occurs would actually complicate things for students. Nonetheless a follow up video would be a good idea.

[@fidezustradiz4748]

The earth's magma is very rich in silica. If silicone dioxide is affected by sound waves and electricity causing its lattice structure to vibrate, will a failed star, white star emitting massive electromagnetic wave towards the earth cause the magma chambers under the volcano to become heated up and more viscous thereby inducing an eruption?

[@StayBassd]

guess it depends on the exact amounts of matter and energy you're dealing with. Seems like it would be tough to tell how much energy is gonna get through the atmosphere then through the crust to affect the magma. I'm not very interested in the answer, but maybe you could isolate your variables, look up the appropriate equations, and grind it out? (I'm curious about just how much energy you need to significantly heat up that much molten rock...seems like a lot).

[@LanDiEvil]

Bruzz… Use SBS's subtitle style (yellow text, black outline) when superimposing texts. Great video tho. Just what I was looking for.

[@PhysicsHigh]

Didn’t know it was SBS style. One of the presets in adobe premiere

[@LanDiEvil]

SBS' (The broadcaster) subs always appear in yellow fill, black stroke. A practice that pre-dates Premier text presets and possibly the invention of non-linear digital editing software.

[@asfarfathima5419]

Can You please explain the production of Ultrasonic wave which the use of piezo electric effect

[@PhysicsHigh]

+Asfar Fathima ??? That's what the video is supposed to do.

[@asfarfathima5419]

at my university they taught me with circuit diagram which i didnt understand so i wanted that please :)

[@NymphetaminexXxGrrrl]

It never occurred to me that the word "ultrasound" involved actual sound. So if an ultrasound uses sound to paint an image is that like echolocation? Do bats see images similar to an ultrasound baby image? Also i have been collecting crystals and minerals, and trying to understand this whole "vibration" thing people are talking about i always assumed that was some kind of spiritual thing, i'm trying to learn if there is any scientific basis for it and it seems there actually is! I'm wondering with crystals like quartz or tourmaline how much pressure needs to be applied to create electricity? and can that electricity be noticeable to humans, for example if i squeeze tourmaline will i feel something like static electricity? Or does the crystal need to be compressed much harder by machine? Sorry i'm asking so many questions i just never learned this at school and its really fascinating. So if i got this right, applying sound to crystal creates electricity and applying electricity to crystals produces sound? Awesome :)

[@PhysicsHigh]

+NymphetaminexXxGrrrl yes but not to any crystal. It needs to become polar under pressure. So for example crystals like salt won't work. Tourmaline is piezoelectric. The effect is usually when you deform the crystal by about 0.1%.

[@jimramos1343]

how to compute the electricity generated by 6 piezoelectric disc (35mm)

[@safalsaraf6141]

Sir, I had a question: If a constant stress is applied on a piezoelectric material, will there be a continuous electric potential produced? Or potential will be produced only for an instance and then we have to relax the material again and apply stress again and repeat the cycle as long as we need electric potential?

[@PhysicsHigh]

Great question. Need to be oscillating.

[@safalsaraf6141]

@@PhysicsHigh Thankyou for the clarification.