Alternating Current vs Direct Current - Rms Voltage, Peak Current & Average Power of AC Circuits

This physics video tutorial provides a basic introduction into the difference between alternating current vs direct current. It explains how to calculate the rms voltage and rms current in an AC circuit as well as the peak voltage and peak current. In addition, it explains how to calculate the average power in an AC circuit. This video contains plenty of examples and practice problems.
Electric Current In Circuits:
• Electric Current & Cir...
The Electric Battery:
• The Electric Battery a...
Ohm's Law Problems:
• Ohm's Law Explained - ...
Resistance and Resistivity:
• Resistivity and Resist...
Resistor Color Code:
• Resistor Color Code Ch...
______________________________
Internal Resistance of a Battery:
• Internal Resistance of...
Electromotive Force of a Battery:
• Electromotive Force of...
Drift Velocity and Current Density:
• Drift Velocity, Curren...
Potential Difference Between Two Points:
• Potential Difference B...
______________________________
Schematic Diagrams & Symbols:
• Schematic Diagrams & S...
Open, Closed, and Short Circuits:
• Open Circuits, Closed ...
Resistors In Series:
• Resistors In Series - ...
Resistors In Parallel:
• Resistors In Parallel ...
Physics PDF Worksheets:
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[@TheOrganicChemistryTutor]

Full 1 Hour Video AC Circuits: www.patreon.com/MathScienceTutor Direct Link to The Full Video: bit.ly/3vEFYjI Physics PDF Worksheets: www.video-tutor.net/physics-basic-introduction.html Final Exams and Video Playlists: www.video-tutor.net/

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What about religion 😂

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Dude, in my student years at school I thought these are very complex topics. It seems that my teacher was a bad teacher or you are a good teacher, I dont know anymore.

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You answered in yourself, "in my student yrs". As the brain develops, and we age, we start to understand materials that we did not when we were young. You just simply started valuing your own knowledge and education as opposed to other things when you were young

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Exactly the same reply I was about to give​@@mysterio5837

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I feel like it's either a hit or miss when teaching physics. This video definitely a hit... My school lecturer a definitive miss!! So helpful, thank you!!

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You make everything so much simpler! Thankyou

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Best explanation. My lecturer has been struggling to make me understand for like over a month but now just in 10mins i have understood whats going on Thank you!!!!!!!!!!😍😍😍

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Thaaaaannnnkkkkkk youuuuuu I am in Portugal studying Renewable energy and this couldn't get into my mind. Neither in Portuguese or other videos.. this explanation killed it! All made sense now! I appreciate it!!! Thank you so much!

[@fireworkhobby9240]

By far the best explanation of RMS on KZbin! Others way over complicate things.

[@JH-ux1re]

Thank you very much, the best professor I’ve even met!

[@vishalmr234]

Learned my bachelor 6 months of electrical basics AC current in few minutes. Thanks :)

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[@akshar234]

Irms = I / root 2 is only applicable for i = iosinwt current if you want to find your own relationship you have to use (irms)^2 = (iavg)^2 where iavg= ∫i^2 dt / t

[@jddominguez17]

Of course my professor and the textbook we're using makes this appear 100,000 times more complicated than it needs to be.

[@linooliva3965]

I’m watching these and these formulas are entirely different than the ones they’ve taught me on I’m so lost

[@BithiSithiGunjon]

Can't express my gratitude for you!

[@successthruknowledge]

Good explanation of peak versus root mean square current and voltage and nice discussion of peak power and average power with thorough discussion of how all of the equations inter-relate!

[@PauldyKelly-y8y]

You a the great teacher I've ever known.

[@notzuhriashraaf4912]

Hi. First of all, thank you for sharing. I have a question, for a step down transformer, that will be used to convert 120V rms to 5V DC. Do we use the Vrms or Vpeak to determine the ratio for the transformer?

[@harjeetsingh8522]

Vrms it is...

[@greenyelectronics]

very good tutorial, thanks for sharing

[@precisionsoundworks8371]

Really great. Thank you for posting. I'm new to this. I get it, but it still racks my brain! :)

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Hello Thanks a lot for helping to refresh my knowledge :) 14 years ago I learned, but never used :) Today I use it :)

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Helpful af

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Best Bester Bestest video on this topic

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you are the best of all!

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Thank you so much for your videos. Your videos are very helpful 🙏

[@brianmcdonough1685]

I have a question about the derivation of the instanteous power - specifically when the current phase is shifted by thetaI. If I went to phasor land and multipled the original volts (120cost(wt+thetaV)) time amps (120cost(wt+thetaI)) I would get V*I@angle(thetaV+thetaI). After doing the phase shift according to the demonstrated calculation (and the formal published power formula) I am now at (thetaV MINUS thetaI). How do I reconcile this mathematically?

[@abuubakarhassan721]

Tnx sir could please elaborate some mechanism physics lectures

[@xunx3234]

Good easy explanation

[@FreshManny209]

Wait...serious question and I mean no offense, but why wouldn't you solve it the easy way? V = I * R; 5*10=50V P = V * I; 50*5=250W Does breaking it down the way you did benefit more for more complex problems? It was kinda confusing me until I realized I had easier formulas to follow. I'm genuinely curious to know. Just diving in to trig and this stuff for work so I'm doing crash course for it all via KZbin lol

[@FreshManny209]

And does this rule work across the board too: IRMS = A*.707 ?? 10*.707=7.07 Also this one: Vrms=V*1.414?

[@nigeltombe3787]

Thanks for everything, very helpful 🙏

[@skyguy2978]

I think this is my third or fourth time watching this video this school year

[@encikcurrent7459]

Very appreciated it. Thanks.

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when your physics teacher says that there are 150 minutes in 1 hour, explains basically nothing all the semester, and puts the hardest questions possible on the exam, this guy is a real life savior

[@jesusmrosario-claudio4104]

Thank you once again.

[@kabandajamir9844]

Thanks sir but we would like you to discuss for us film and ceramic capacitor s in an embriodary machine

[@orkhansafarli5992]

Thanks for easy explanation, but I have a question to you. In the 3rd problem, in other you mean there that Rms and Average currents and powers are all same things. Cuz you calculate Average Power with Rms current and Voltage. So, can I say that they mean actually the same things everywhere ?

[@syazwanrashid1842]

flow of current is from -ve to +ve right? because electron, as we know negatively charged so, are attracted to +ve end of battery. Correct me if I am wrong. Tq

[@xzy7196]

The path of electrons is opposite of the current flow.

[@sridharchitta7321]

Current in a resistor is a start-stop motion of conduction band electrons due to their collision with the rocking lattice ions, and this causes a resistor with a sinusoidal voltage applied, to produce heat. The polarity reversals of an applied sinusoidal voltage (with the direction reversals of the applied electric field) do not affect electron collisions with the lattice ions. Electrons colliding with lattice ions from either direction will continue to produce heat and there is no cancellation of the heat developed! Mathematically, the average value of a sinusoid is zero, and so, the average value of the current will also be zero. The average values cannot therefore represent the heat developed in a resistor with a sinusoidal current. A resistor cannot develop heat due to a current in one half-cycle and then cool itself by a like amount of heat during the next half-cycle! It develops heat either way whether the current is positive or negative. The lattice ions vibrate from collisions irrespective of the directions in which the electrons collide with them. Therefore, since the average value is zero, it necessitates the use of the root-mean-square values of the voltage and current to compute the power, which is a statistical measure of the magnitude of a varying quantity and is the square root of the arithmetic mean of the square of the sinusoidal function. Electrostatics and circuits belong to one science not two. To learn the operation of circuits it is instructive to understand Current, the conduction process, resistors and Voltage at the fundamental level as in the following two videos: i. kzbin.info/www/bejne/ioXXpWVul5aXj9E and ii. kzbin.info/www/bejne/bnO0fpKurJeFnNE It is not possible in this post to discuss in more detail average and rms values. The last frame References in video #1 lists textbook 4 which discusses in detail using a unified approach sinusoidal voltage, current, their average and root mean square values.

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Damn I'm gonna pass 12th grade physics, maths and chemistry all thanks to you

[@thushendranbalamuraly1981]

What does peak power means and what is the formula to find peak power

[@macriz3869]

really help full

[@jaedin5413]

Thank you for the help bro

[@US-Warrior]

What does 0.637 & 1.414 mean when dealing with sine waves

[@lcm-nx2zi]

May I ask why question no.3 the vrms are equal to 240V?

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You're my life saver 🥰🥰🥰

[@AthenaNKnight]

Wish he did real current direction

[@shrinivasrao1734]

Thanks a lot Sir!

[@sheldoncooper1988]

How the f u know everything u are so smart

[@_robin8]

Vrms is stay the same calculation no matter of how many resistances? Because i wonder about how to calculate Vrms in 4 resistance and Vs= 30V peak...

[@hanansalong9936]

Ac dc is rock band😊🤘🤘🤘

[@Luciusilver]

Please for the question 3,how come the 200 watt is not the maximum power but rather the average power?

[@winnieokeyo6778]

Will my tester indicate a voltage on the negative line in AC at the moment flow of current is reversed ?

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A small thing, but i like hearing the calculator in the background.

[@abdirahmanbutugey2315]

Thank you so much

[@sridharchitta7321]

A sinewave depicts movements in the form of waves. It has a datum, rapid, slowing and steady growth in one direction for a quarter cycle with reference to a datum (a reference), and then slow and faster decay in one direction for the next quarter cycle, and all these elements again in the opposite direction (reversal) of the forward movement for the next half-cycle. It has peaks and valleys. In essence, the sinewave is a perfect embodiment of oscillatory movements like springs and quantities like voltage. It retains its waveshape when added to another sinewave of the same frequency and arbitrary phase and is the only periodic waveform which has this property. The charges in a resistor subject to a sinusoidal voltage do not migrate elsewhere on the average. They merely slosh back and forth, so to say, over each cycle without a change in their position when the resistor was not energised. Electrostatics and circuits belong to one science not two. To learn the operation of circuits it is instructive to understand Current, the conduction process and Voltage at the fundamental level as in the following two videos: i. kzbin.info/www/bejne/ioXXpWVul5aXj9E and ii. kzbin.info/www/bejne/bnO0fpKurJeFnNE A sinusoidal voltage generator operates by separating charges for the positive half-cycle in one direction initially rapidly and slowing down and momentarily halting when its voltage is at the positive peak, and then gradually reuniting the separated charges to make the separation zero; when all charges reunite, the generator voltage is zero. The negative half-cycle now commences, when the generator operates by separating charges in the opposite direction initially rapidly and slowing down and momentarily halting when its voltage is at the negative peak, and then gradually reuniting the charges to make their separation zero; when all charges reunite, the generator voltage is zero. It then begins the next positive half-cycle followed by the negative half-cycle and the process repeats. The last frame References in video #1 lists textbook 4 which discusses these topics in more detail using a unified approach and provides an intuitive understanding of sinusoidal steady-state voltages and currents in capacitive and inductive circuits.

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Why do we multiply by root 2?

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Ya cuz the I dont understand these damn assignments

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You

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Amazing

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I was hoping for AC to DC converter voltage, and amp drop.

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Please help me with this question because I have been trying solving it since almost ten years now but still couldn't solve it. This is question; A lump of gold is suspected to contain some aluminium. If d gold sample has a mass of 500g and is found to av a relative density of 5.2, find what mass of gold is present if d relative densities of gold n aluminum are respectively 19.3 and 2.6

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the answer is 78g

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[@sevdrakegavial]

what is rms voltage

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[@kiritbeedasee1034]

why the 240 V is equal to Vrms??

[@Astonreid43]

Conventional, - negative to + positive...

[@misc_]

Bravo

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your good

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The answer to no.4 500 right

[@olatunjinurudeen1230]

Can any body help with this : When 100v DC is applied across a coil , current of 1A flow through it.When 100v, 50Hz A.c is applied to the same coil, only 0.5A flows ,The Inductance of the coil is __

[@saatieshmogan3276]

Inductive reactance

[@marceorigoni6614]

Well the issues come when they are not purely resistive circuits

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I love you

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Can somebody help me pls in this direction do i use the battery symbol or the (AC) symbol like "Draw a shematic diagram of four bulbs connected in parallel controlled by a single pole switch using alternating current" PLS HELPP NOW __________ | | | | | Ac sym. ○ ○ ○ ○ | | | | | |__switch__| Or __________ | | | | | Bat sym. ○ ○ ○ ○ | | | | | |__switch__|

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11:28

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I am in computer science majorand chemistry minor

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And you can teach me anything I need

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How do I do this if I only have hertz

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@@Jess_Atomoxetine V = Vosin2πft where f is the frequency in Hz or rad/s.

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I thought (IR)I=I^2(IR)

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Hi... Voltage Rock n Roll!

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He sounds like mark wahlberg

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I don't like the coldness of his explanation.. I feel like I'm gonna fall asleep

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