Great video, thanks! That really helped me to understand a primary coil÷ secondary coil ratio of a step down transformer whose load was rectified to DC.... I couldn't understand how I was out by root 2! now, thanks to you I clearly understand it. Great job!!
Can this calculation can be use in determining the RMS rating of an amplifier? Coz im confused now how will i set my amp with the 1300w peak.. i used this method so i found out its around 900w RMS.
Hi, I am trying to decide which speakers to buy. I am looking at the peace pv215, pv215d. pv215=700watts continious(program pv215d=400watts program 800peak. I am confused, seems to me that the pv215 is better than the pv215d on continuous . Can you help me on this ? 🙏
Most meters read the rms value which is 70.7% of the rise and fall of the sine wave + and - wave which is the average of the wave. So 10v rms is actually 14.14v Peak to Peak. So when we rectify 10vac we actually get 14.14vdc.A good fluke meter will have a Peak to Peak scale or range. As for KWH meters they will read true power which is Peak to Peak. Electric Companies sure as hell won't average usage. Hope this helps
Hmm isnt rms 70.7% of the highest k/w at the peak? Like 10k watt at peak. Briged 2 ohms. Is 2400 wrms. On 2 ohm. 1200 wrms 4 ohm. 4000 1 ohm. How about 0.5 ohm?? Correct me if i am wrong
nice now 12 volt system is the same peak = 2000 w rms = 1000 5-channel car amplifier Class-D amplifier design 75 watts RMS x 4 + 350 watts RMS x 1 at 4 ohms 100 watts RMS x 4 + 600 watts RMS x 1 at 2 ohms 200 watts RMS x 2 bridged at 4 ohms + 600 watts RMS x 1 at 2 ohms Preamp and speaker-level inputs Frequency Response: A/B CH: 10Hz ~ 50kHz (+0dB, -3dB) / SUB CH: 10Hz ~ 500Hz (+0dB, -3dB) Signal-to-Noise (SN) Ratio: > 94dB Variable high- and low-pass filter (40-500 Hz, 12 dB/octave) on 4-channel section Variable low-pass filter (40-500 Hz, 12 or 24 dB/octave) on sub channel Variable bass boost (0-18 dB at 50 Hz) on sub channel Wired remote bass boost control for sub channel
this cat is to smart. so assuming this whole RMS peak thing I guess car audio amplifier manufactures lie to us. for instance 1200watt amp with peak always is doubled but should only be RMS / 0.707
Audio marketing can be very tricky. Many times yes they over rate their products. Peak power output is usually transient and can not be sustained. It's not uncommon for that market to often exaggerate peak or rms power levels. Also rms can be somewhat useless unless you know what waveform they are testing to get those rms numbers. The audio industry typically uses a 1KHz sine wave to market power levels, distortion, and low frequency to measure damping factor.
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. ua-cam.com/video/REsWdd76qxc/v-deo.html and ii. ua-cam.com/video/8BQM_xw2Rfo/v-deo.html 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.
Volt RMS is useful because voltage is squared in the formula to get power. Watt RMS is nonsensical because there is no meaningful formula containing squared power. Watt RMS is used often to stand for "continuous average power" but it's a silly misconception repeated over and over in audio marketing and by audio equipment consumers, not so much by engineers though. By the way, power cycles at twice the rate as voltage but it's always positive, unlike voltage.
myonlynick it is an average so there is no cosine involved. The average is just a number. When you have the cosine function we are talking instantaneous values. The rms values are derived using sinusoids in the next video.
thanks for replying. I am sorry, i do not want to confuse you, but cosine exists!!!There is an alternative way to represent P using the math tool called complex number. if you use complex numbers to represent power, then P is a complex number where the Im{P} part may(or may not) be 0 and Re{P} = Vrms*Irms*cos(θ).We know that cos0=1. i am talking about AC circuits. As a side note, that cos is what all power plant companies are afraid of in power lines and they always try to keep it in check, it's called the 'cosine factor'.
You are thinking of complex power. In that case the cosine represents something called power factor. It is the real component of complex power. In this video I don't talk about that. The power factor is the ratio of real power to apparent power and that ratio is the cosine of the phase shift between the voltage and current waveforms.
myonlynick also in the video I used only resistive loads in the example. In that case you can disregard the cosine. Howeve the cosine would come into play if the load had any reactive components. I just didnt talked about that to keep the video simpler. Often it confuses people talking about the many types of power.
You can think of it sort of like that. Although average is an entirely different concept. Average and RMS are not the same. The average value is actually 0 because it is equally positive and negative over one cycle. You can take the average of the absolute value of the waveform which is close to the RMS but still not the same not the same. Average of the absolute value which is equal tho the average of the positive half of the cycle is 0.637 rather than 0.707 from the RMS value.
Your explanation is not correct. The average value of sine wave is zero. 1/T * integral of ( A*sin(wt) dt ) , integral from 0 to T. Vavg = 0. So it's not correct to use the term average value. The RMS - Root Mean Square value = Also called Effective value. root two of [ (1/T) * integral of ( |A*sin(wt)|^2) ] dt ) , integral from 0 to T. This will give Veff=Vmax/(root of 2).
Some people are really great at explaining certain ideas, you sir are one of those people. Thanks!!!
Viva Colombia!
The best explanation for RMS I found on UA-cam, Thank You very much.
Dude. Thank you for explaining something my professor didn't have the patience to explain. He always says "it is what it is".
great job.
Very simple and articulate.
Thank you.
Thank you so much for explaining this; it helps to understand the concept!
Jacob, you explained RMS very well in a practical sense, without all of the cumbersome math, that I learned in school!
Thank you for this tutorial. It just cracked the code for me again to refresh.
Great video, thanks! That really helped me to understand a primary coil÷ secondary coil ratio of a step down transformer whose load was rectified to DC.... I couldn't understand how I was out by root 2! now, thanks to you I clearly understand it. Great job!!
you are the best teacher. Everything became clear after I see your video.
Fantastic Explanation! It finally clicked for me, thank you. If this was reddit, I'd give you Gold lol
Thank youuuu very much! You are very good at explaining.
please do more explaining the concept videos without too much math.
Great job I now understand rms thanks to you.
Great explanation and video. Thank you.
Awesome Explanation....liked and subscribed!
Thanks man it helped me a lot
Excellent explanation. Thank you.
awesome tutorial, best on this topic
amazing, really I like your explanation, you are informative
Great explanation. Thank you
brilliant dude..thanks for such amazing explanation.
outstanding video!
Good job Mr.
Thank you, my teacher is doing this in algebra as well.
excellent lesson!!!!!!!
Great explanation
Excellent explanation
Nice explanation
great explanation
Helpful 👌🏼
Nice video...
Can this calculation can be use in determining the RMS rating of an amplifier? Coz im confused now how will i set my amp with the 1300w peak.. i used this method so i found out its around 900w RMS.
Hi, I am trying to decide which speakers to buy. I am looking at the peace pv215, pv215d.
pv215=700watts continious(program
pv215d=400watts program
800peak.
I am confused, seems to me that the pv215 is better than the pv215d on continuous . Can you help me on this ? 🙏
Thank you sir ❤
In 3 phase 415 vac to convert DC what will be effect on current or voltage
Very good
Where do I find that other video he's talking about?!
Thank you
I remember it as the square root of the mean of the squares
Thanks, when we put a measurement instrument in main supply (AC supply) let say KWH meter or Voltmeter, is it reading the peak or RMS value?
Fardan Fardann power is a little different there are many ways to measure power. Typically a simple KWH meter measures RMS real power.
Most meters read the rms value which is 70.7% of the rise and fall of the sine wave + and - wave which is the average of the wave. So 10v rms is actually 14.14v Peak to Peak. So when we rectify 10vac we actually get 14.14vdc.A good fluke meter will have a Peak to Peak scale or range. As for KWH meters they will read true power which is Peak to Peak. Electric Companies sure as hell won't average usage. Hope this helps
Utility companies do not measure or bill peak to peak. KWH meters are based on RMS values.
Let we have 230 v RMS to what effect on DC after rectification
Cool
Haiiii sir how to find margins on angle broking in company to company plz reply me sir
I like Sharpie markers!
well explained
Thanks!
👍👍👍👍👍👍
Smart
i hate proofs, its like they've been done a million times before so can we just accept the numbers and move on lol , great video!!!
Can you tell me the actual formula for rms? I couldn't understand it well
Sorry
Hmm isnt rms 70.7% of the highest k/w at the peak? Like 10k watt at peak. Briged 2 ohms. Is 2400 wrms. On 2 ohm. 1200 wrms 4 ohm. 4000 1 ohm. How about 0.5 ohm??
Correct me if i am wrong
How different between max and peak؟؟
The mains voltage is 120v peak to peak so the mains voltage when treated as VRMS is 0.707 x 120v
Chris Cain no mains voltage is 170V peak to peak and 120 Vrms is obtained by 170 Vpp * 0.707
Jacob Dykstra did u mean, vpp is 0v to positive peak? Or from negative peak to positive peak? (170v vpp)
@@electricfieldtv709
170V is from 0 to peak and not Vpp(negative to postive peak)
0.707 X supply Voltage for a full wave rectifier circuit FWR. Not HWR circuit.
Right? Right!
what is the relation between rms value and peak value?
RMS value =peak value /√2
nice now 12 volt system is the same peak = 2000 w rms = 1000 5-channel car amplifier
Class-D amplifier design
75 watts RMS x 4 + 350 watts RMS x 1 at 4 ohms
100 watts RMS x 4 + 600 watts RMS x 1 at 2 ohms
200 watts RMS x 2 bridged at 4 ohms + 600 watts RMS x 1 at 2 ohms
Preamp and speaker-level inputs
Frequency Response: A/B CH: 10Hz ~ 50kHz (+0dB, -3dB) / SUB CH: 10Hz ~ 500Hz (+0dB, -3dB)
Signal-to-Noise (SN) Ratio: > 94dB
Variable high- and low-pass filter (40-500 Hz, 12 dB/octave) on 4-channel section
Variable low-pass filter (40-500 Hz, 12 or 24 dB/octave) on sub channel
Variable bass boost (0-18 dB at 50 Hz) on sub channel
Wired remote bass boost control for sub channel
this cat is to smart. so assuming this whole RMS peak thing I guess car audio amplifier manufactures lie to us. for instance 1200watt amp with peak always is doubled but should only be RMS / 0.707
Audio marketing can be very tricky. Many times yes they over rate their products. Peak power output is usually transient and can not be sustained. It's not uncommon for that market to often exaggerate peak or rms power levels. Also rms can be somewhat useless unless you know what waveform they are testing to get those rms numbers. The audio industry typically uses a 1KHz sine wave to market power levels, distortion, and low frequency to measure damping factor.
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. ua-cam.com/video/REsWdd76qxc/v-deo.html and
ii. ua-cam.com/video/8BQM_xw2Rfo/v-deo.html
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.
Volt RMS is useful because voltage is squared in the formula to get power. Watt RMS is nonsensical because there is no meaningful formula containing squared power. Watt RMS is used often to stand for "continuous average power" but it's a silly misconception repeated over and over in audio marketing and by audio equipment consumers, not so much by engineers though. By the way, power cycles at twice the rate as voltage but it's always positive, unlike voltage.
where is *cosθ* in Pavg= Vrms * Irms ? Nice video though.
myonlynick it is an average so there is no cosine involved. The average is just a number. When you have the cosine function we are talking instantaneous values. The rms values are derived using sinusoids in the next video.
thanks for replying. I am sorry, i do not want to confuse you, but cosine exists!!!There is an alternative way to represent P using the math tool called complex number. if you use complex numbers to represent power, then P is a complex number where the Im{P} part may(or may not) be 0 and Re{P} = Vrms*Irms*cos(θ).We know that cos0=1. i am talking about AC circuits. As a side note, that cos is what all power plant companies are afraid of in power lines and they always try to keep it in check, it's called the 'cosine factor'.
You are thinking of complex power. In that case the cosine represents something called power factor. It is the real component of complex power. In this video I don't talk about that. The power factor is the ratio of real power to apparent power and that ratio is the cosine of the phase shift between the voltage and current waveforms.
myonlynick also in the video I used only resistive loads in the example. In that case you can disregard the cosine. Howeve the cosine would come into play if the load had any reactive components. I just didnt talked about that to keep the video simpler. Often it confuses people talking about the many types of power.
lol very complex.... (>o
Because it's not always 170 it averages to 120
You can think of it sort of like that. Although average is an entirely different concept. Average and RMS are not the same. The average value is actually 0 because it is equally positive and negative over one cycle. You can take the average of the absolute value of the waveform which is close to the RMS but still not the same not the same. Average of the absolute value which is equal tho the average of the positive half of the cycle is 0.637 rather than 0.707 from the RMS value.
i thought this was music PEAK and RMS
Aldsome ISAWESOME same thing, music is just electrical signals when played through a stereo
When you keep using the word "Average". Don't you mean Effective?
I couldn’t watch this video because of the sound of the sharpie
Your explanation is not correct. The average value of sine wave is zero. 1/T * integral of ( A*sin(wt) dt ) , integral from 0 to T. Vavg = 0.
So it's not correct to use the term average value. The RMS - Root Mean Square value = Also called Effective value. root two of [ (1/T) * integral of ( |A*sin(wt)|^2) ] dt ) , integral from 0 to T. This will give Veff=Vmax/(root of 2).
HWT THE HECK IS UP
يابن الحلال اتكلم براحة شوية
Rewatch this. 1 math is a lie, and dc vs ac is the biggest shit vs piss situation. We need cold electricity from tesla
Very good