Whenever I'm studying for something, I always look for your videos first. Just a few hours ago, I was looking for your video on what exactly currents are. Truly a grade saver haha! ♡
13:50 I think the way the question is posed, the answer should be 36A leaving the node. I_2 and I_3 are shown as negative leaving the node, therefore they are really entering the node and 12+8+16=36A
Going back to basic when you graduated 2 decades ago can be pain in the ass. But I found your voice soothing and very clear, it made me focus to what you were saying and learned back the things that I already forgot. Thank you. You are awesome.
TOCT, you are an exceedingly gifted young man. Just sayin'. Thanks for what you do. And please note that I refer to you as "young" only because I am old.
Why is it that in resistors in series the current I is the same across the many resistors as per your statement, when I guess that "each" resistor lowers the current as it passes through them, ie. at the end the current will be the result of the formula, but the first resistor should have only lowered it so much?
If energy flows through the path of less resistance, why is it that in a parallel circuit we do not take the lowest resistance path (R1 in your example) as the only possible variable to calculate current, ie. why is it shared with the other paths/resistances?
Are you asking what types of resistors or resistor materials are practical? I think a lot of resistors used for experimenting with electronics are made out of ceramics, but I think there's many other materials you can use as well.
I WAS ALWAYS UNDER THE IMPRESSION THAT VOLTAGE IS THE POTENTIAL DIFFERENCE THAT AN ELECTRON EXPERIENCES, ( its " height of fall" if you will) WHILE CURRENT REPRESENTS QUANTITY OR VOLUME OF FLOW. EXAMPLE FROM THE VISIBLE GRAVITATIONAL WORLD IS AS FOLLOWS. THE VOLUME OF WATER FLOWING THROUGH A CHANNEL ( ie. river bed) WOULD DETERMINE THE RATE OF FLOW ( ie. amperage) ( note how larger cables are required for larger loads when using higher amperage tools, for example. The thicker cable being akin to a wider and or deeper river bed conducting greater flow. VOLTAGE, ON THE OTHER HAND, IS AKIN TO THE DISTANCE THAT EACH ( call it, " quantum of water ") FALLS UNDER THE INFLUENCE OF GRAVITY. THE GREATER THE FALL, THE GREATER THE POTENTIAL DIFFERENCE. ie. VOLTAGE EXAMPLE, SMALL VOLUMES OF WATER CAN BE PUT UNDER HIGH PRESSURE, AND THEN BE USED TO BLAST OFF 30 YEARS OF DIRT AND GRIME ON A CONCRETE SURFACE. ( this is a condition of low volume, but high pressure. ie". high voltage, low amperage ".) NOW CONSIDER A HUGE FLOOD RAVISHING THE LANDSCAPE. THE SPEED OF THE WATER ( ie. its "voltage" is low .perhaps it moves at 20 km./hr.) HOWEVER, ITS VOLUME ( ie. " amperage " is enormous) SINCE IT CAN EASILY LIFT A HOUSE OFF OF ITS FOOTINGS AND CARRY IT AWAY. SO YOU CAN SEE HOW HOW VOLTAGE OR PRESSURE IS DUE TO THE POTENTIAL DIFFERENCE, AND HOW AMPERAGE IS A FUNCTION OF VOLUME, OR THE FLOW RATE OF EACH QUANTUM OF ACTION, IF YOU WILL. TO CONCLUDE, THEY ARE QUITE INDEPENDENT OF EACH OTHER, AND AREN'T DIRECTLY RELATED AS YOU SEEM TO SUGGEST. What we end up with is a GRAVITATIONAL analog to electromagnetic circuit The river bed is the channel or " wire" conducting current flow, quite literally, l would add. THE DAMN IS THE RESISTOR, which can be used to control FLOW RATE, on the one hand, and increase the POTENTIAL DIFFERENCE, on the other. INTERESTING IDEAS TO BE SURE,AND INDISPENSABLE FOR AN ATTEMPT AT UNITING GRAVITY AND ELECTROMAGNITISM IN THE UNIFIED FIELD THEORY. " HAVE A NICE DAY "
What is current ? What is voltage ? A working definition for current in conductors like metal wires is "the start-stop motion of millions and millions of conduction band electrons everywhere within with a drift superimposed". In circuits, voltage is due to surface charges. Consider a simple circuit comprising a battery, two wires and a resistor. The e.m.f of the battery is due to separation of positive from negative charges which produces an e.m.f across its terminals and a pattern of electric field surrounding them, not exactly but like a dipole. An electric field is there in the wires and in the resistor; powerful electric field and uniform within the resistor, weak and uniform within the wires. The field is set up by a tiny amount of surface charge with a steep gradient on the resistor and not so steep a gradient on the wires. It is the electric field E created by the surface charges sourced from the battery, which produces a force causing the mobile electrons to acquire a drift velocity v = μE, where μ is the mobility which is a number representing the freedom of movement of the electron in the lattice. This results in a current density J = σE, where σ is the conductivity of the wire or material of resistor and E is the electric field in the wire if considering wire and is the field in the resistor when considering the resistor. The p.d. or voltage across the resistor is the integral of a constant powerful field along its length. The p.d. or voltage across the wires is the integral of a constant but weak field along its length. Voltage is entirely because of the surface charges. What is a resistor? While some detail is given in science and engineering courses about conductors, insulators and semiconductors, resistance is described in several ways. Examples include i. The restriction to the flow of electrons. ii. The difficulty in moving electrical current through a conductor to which voltage is applied. iii. a circuit element which dissipates energy in the form of heat . More appropriate description for a resistor would be the property of a conductor which determines the current produced by a given difference of potential. This makes us remember that a resistor is a conductor first. And, there is reason to say that superconductive wires dont obey ohm's law. So all conductors are resistive, though not superconductors. Resistors are used in circuits to regulate the strengths of currents either by reducing the diameter of conductors or introducing more obstacles or lattice imperfections to reduce the strength of current. For more details about resistance and ohm's law consult the following videos, articles and books. For a live demonstration of surface charge and its effects in circuits visit th-cam.com/video/U7RLg-691eQ/w-d-xo.html Electrostatics and circuits belong to one science and not two, that of electricity and magnetism. To know how they are unified visit this link matterandinteractions.org/articles-talks/ and view the article 'A unified treatment of electrostatics and circuits. B. Sherwood and R. Chabay, unpublished. (1999)' pdf. For a detailed discussion of currents, voltage and surface charge see Electric and Magnetic Interactions by Chabay and Sherwood www.matterandinteractions.org or www.wileyindia.com/fundamentals-of-electric-theory-and-circuits.html There is a "look inside" feature in the amazon.com webpage of the book "Fundamentals of electric theory and circuits" by Sridhar Chitta which you can swipe left or press < icon and view the foreword, preface and Table of Contents. For a lecture by Prof Ruth Chabay on surface charge in a simple dc circuit visit th-cam.com/video/-7W294N_Hkk/w-d-xo.html
@@PunmasterSTP I write it in computer notepad and check and correct a few times. The process of writing my book 'Fundamentals of Electric Theory and Circuits' enables me to write such short notes quite fast and with few errors because the theory, principles AND the visualisation of circuit processed are clear in my mind. I must thank Profs Hermann Haertel and Chabay and Sherwood for their artickes, papers and textbooks and their interactions with me in the course of writing my book now marketed by Wiley India. I thank you for asking me this question. Prof (Retd.) Sridhar
@@sridharchitta7321 Awesome; I checked it out and it looks good! Is the content of that video based on 'Fundamentals of Electric Theory and Circuits', or another project?
I'm not sure; new events happen all the time, so what is "current" always changes. 😎 But seriously, your videos are amazing. Keep up your outstanding work, as I see that many people (myself included) are greatly benefitting from it!
Whenever I'm studying for something, I always look for your videos first. Just a few hours ago, I was looking for your video on what exactly currents are. Truly a grade saver haha! ♡
What is current?
Me:- The rate of flow of charge is known as current.
13:50 I think the way the question is posed, the answer should be 36A leaving the node. I_2 and I_3 are shown as negative leaving the node, therefore they are really entering the node and 12+8+16=36A
Going back to basic when you graduated 2 decades ago can be pain in the ass. But I found your voice soothing and very clear, it made me focus to what you were saying and learned back the things that I already forgot. Thank you. You are awesome.
TOCT, you are an exceedingly gifted young man. Just sayin'. Thanks for what you do. And please note that I refer to you as "young" only because I am old.
Your are the teacher I am looking for
Praise the Lord I found you
Thank u teacher for electrical playlist
Thank you so much for uploading this, I really need it. I have an exam coming up this Monday about this topic. Thanks again.
Are you from Pakistan???
@@aqeelshah5801 No
@@ak8616 ok thanks
How did your exam go?
Thanks for making your calculus videos
This video's are more helpfull for mee keep doing more vidoes
15:30 what if there are more than 2 resistors in parallel. Then what will be the formula now?
hes back!!
Is it really the electrons flowing? Is it not the push-force between them?
What tools does he use to make these types of videos ?
I am having doubt at 9:07 why we take 1/r1+1/r2+1/r3 why not r1+r2+r3
Because in parallel the total resistance will always be less than individual resistors.
Sir, Why did you divide 1 by charge of electron while calculating 1Amps in 3:30
Why is it that in resistors in series the current I is the same across the many resistors as per your statement, when I guess that "each" resistor lowers the current as it passes through them, ie. at the end the current will be the result of the formula, but the first resistor should have only lowered it so much?
If energy flows through the path of less resistance, why is it that in a parallel circuit we do not take the lowest resistance path (R1 in your example) as the only possible variable to calculate current, ie. why is it shared with the other paths/resistances?
what is programm name you are using to draw these circuits?
Thank you❤
What is resistor in practical?
Are you asking what types of resistors or resistor materials are practical? I think a lot of resistors used for experimenting with electronics are made out of ceramics, but I think there's many other materials you can use as well.
I WAS ALWAYS UNDER THE IMPRESSION THAT VOLTAGE IS THE POTENTIAL DIFFERENCE THAT AN ELECTRON EXPERIENCES, ( its " height of fall" if you will) WHILE CURRENT REPRESENTS QUANTITY OR VOLUME OF FLOW.
EXAMPLE FROM THE VISIBLE GRAVITATIONAL WORLD IS AS FOLLOWS.
THE VOLUME OF WATER FLOWING THROUGH A CHANNEL ( ie. river bed) WOULD DETERMINE THE RATE OF FLOW ( ie. amperage)
( note how larger cables are required for larger loads when using higher amperage tools, for example. The thicker cable being akin to a wider and or deeper river bed conducting greater flow.
VOLTAGE, ON THE OTHER HAND, IS AKIN TO THE DISTANCE THAT EACH ( call it, " quantum of water ") FALLS UNDER THE INFLUENCE OF GRAVITY.
THE GREATER THE FALL, THE GREATER THE POTENTIAL DIFFERENCE. ie. VOLTAGE
EXAMPLE,
SMALL VOLUMES OF WATER CAN BE PUT UNDER HIGH PRESSURE, AND THEN BE USED TO BLAST OFF 30 YEARS OF DIRT AND GRIME ON A CONCRETE SURFACE. ( this is a condition of low volume, but high pressure. ie". high voltage, low amperage ".)
NOW CONSIDER A HUGE FLOOD RAVISHING THE LANDSCAPE. THE SPEED OF THE WATER ( ie. its "voltage" is low .perhaps it moves at 20 km./hr.) HOWEVER, ITS VOLUME ( ie. " amperage " is enormous) SINCE IT CAN EASILY LIFT A HOUSE OFF OF ITS FOOTINGS AND CARRY IT AWAY.
SO YOU CAN SEE HOW HOW VOLTAGE OR PRESSURE IS DUE TO THE POTENTIAL DIFFERENCE, AND HOW AMPERAGE IS A FUNCTION OF VOLUME, OR THE FLOW RATE OF EACH QUANTUM OF ACTION, IF YOU WILL.
TO CONCLUDE, THEY ARE QUITE INDEPENDENT OF EACH OTHER, AND AREN'T DIRECTLY RELATED AS YOU SEEM TO SUGGEST.
What we end up with is a GRAVITATIONAL analog to electromagnetic circuit
The river bed is the channel or " wire" conducting current flow, quite literally, l would add. THE DAMN IS THE RESISTOR, which can be used to control FLOW RATE, on the one hand, and increase the POTENTIAL DIFFERENCE, on the other.
INTERESTING IDEAS TO BE SURE,AND INDISPENSABLE FOR AN ATTEMPT AT UNITING GRAVITY AND ELECTROMAGNITISM IN THE UNIFIED FIELD THEORY.
" HAVE A NICE DAY "
I think those are some good ways to think of things!
What is current ? What is voltage ?
A working definition for current in conductors like metal wires is "the start-stop motion of millions and millions of conduction band electrons everywhere within with a drift superimposed".
In circuits, voltage is due to surface charges. Consider a simple circuit comprising a battery, two wires and a resistor.
The e.m.f of the battery is due to separation of positive from negative charges which produces an e.m.f across its terminals and a pattern of electric field surrounding them, not exactly but like a dipole.
An electric field is there in the wires and in the resistor; powerful electric field and uniform within the resistor, weak and uniform within the wires. The field is set up by a tiny amount of surface charge with a steep gradient on the resistor and not so steep a gradient on the wires.
It is the electric field E created by the surface charges sourced from the battery, which produces a force causing the mobile electrons to acquire a drift velocity v = μE, where μ is the mobility which is a number representing the freedom of movement of the electron in the lattice.
This results in a current density J = σE, where σ is the conductivity of the wire or material of resistor and E is the electric field in the wire if considering wire and is the field in the resistor when considering the resistor.
The p.d. or voltage across the resistor is the integral of a constant powerful field along its length. The p.d. or voltage across the wires is the integral of a constant but weak field along its length.
Voltage is entirely because of the surface charges.
What is a resistor?
While some detail is given in science and engineering courses about conductors, insulators and semiconductors, resistance is described in several ways.
Examples include i. The restriction to the flow of electrons. ii. The difficulty in moving electrical current through a conductor to which voltage is applied.
iii. a circuit element which dissipates energy in the form of heat .
More appropriate description for a resistor would be the property of a conductor which determines the current produced by a given difference of potential.
This makes us remember that a resistor is a conductor first. And, there is reason to say that superconductive wires dont obey ohm's law. So all conductors are resistive, though not superconductors.
Resistors are used in circuits to regulate the strengths of currents either by reducing the diameter of conductors or introducing more obstacles or lattice imperfections to reduce the strength of current.
For more details about resistance and ohm's law consult the following videos, articles and books.
For a live demonstration of surface charge and its effects in circuits visit
th-cam.com/video/U7RLg-691eQ/w-d-xo.html
Electrostatics and circuits belong to one science and not two, that of electricity and magnetism. To know how they are unified visit this link
matterandinteractions.org/articles-talks/ and view the article 'A unified treatment of electrostatics and circuits. B. Sherwood and R. Chabay, unpublished. (1999)'
pdf.
For a detailed discussion of currents, voltage and surface charge see Electric and Magnetic Interactions by Chabay and Sherwood
www.matterandinteractions.org
or
www.wileyindia.com/fundamentals-of-electric-theory-and-circuits.html
There is a "look inside" feature in the amazon.com webpage of the book "Fundamentals of electric theory and circuits" by Sridhar Chitta which you can swipe left or press < icon and view the foreword, preface and Table of Contents.
For a lecture by Prof Ruth Chabay on surface charge in a simple dc circuit visit
th-cam.com/video/-7W294N_Hkk/w-d-xo.html
That was certainly a lot of (useful) information. Did you find that text somewhere, or did you come up with it on the spot?
@@PunmasterSTP I write it in computer notepad and check and correct a few times. The process of writing my book 'Fundamentals of Electric Theory and Circuits' enables me to write such short notes quite fast and with few errors because the theory, principles AND the visualisation of circuit processed are clear in my mind. I must thank Profs Hermann Haertel and Chabay and Sherwood for their artickes, papers and textbooks and their interactions with me in the course of writing my book now marketed by Wiley India. I thank you for asking me this question. Prof (Retd.) Sridhar
@@sridharchitta7321 I’m very glad to hear it! Could you provide a link to your book so I can check it out if I have free time sometime? Thanks.
@@PunmasterSTP you may see this video I uploaded less than hour ago th-cam.com/video/REsWdd76qxc/w-d-xo.html
@@sridharchitta7321 Awesome; I checked it out and it looks good! Is the content of that video based on 'Fundamentals of Electric Theory and Circuits', or another project?
thank you.
how to calculate if the circuit is series
hello!
Gold
I wrote it.
Someone can help me answer "why we have the formula in 15:30 "
💜💜💜
What is life?
I like potatoes
Second!
Why you stopped making math videos 😢😢
He's taking a break he said.
I'm not sure; new events happen all the time, so what is "current" always changes. 😎
But seriously, your videos are amazing. Keep up your outstanding work, as I see that many people (myself included) are greatly benefitting from it!