Watching every single one of your videos and let me just say the amount of details you give us in such a short amount of time is super helpful and covers so much. Thank you!
Thankyou for this video, i'm currently doing an auto electrical trade apprenticeship and the material and way in which it was presented in class was for some reason no where near this clear.
Ohm's Law is our everything😀 Not only in instrumentation but everywhere where electricity is of use. It's also of high importance and usage in automotive electrical and electronics systems repair.
In a circuit with only a resistor connected to a battery the resistor drops all the voltage. The voltage before the resistor is the same as the battery voltage and after the resistor 0V. The current in the circuit is the same everywhere. If you put a light bulb in series with the resistor it doesn't matter if it is before or after the resistor. The voltage across the light bulb the same everywhere.
So voltage is directly proportional to current and resistance V=IR. So I was thinking about putting a volt meter across a battery. There must be current flow to measure the voltage. So I looked this up and the volt meter has a very high resistance resistor in the circuit and uses ohms law to calculate voltage (from current and a known value of a resistor). So all these years checking power supplies, batteries, etc. I am really checking voltage drop across the battery or power supply with a very high amount of resistance in the circuit to give the maximum possible voltage drop of the power supply or battery. If there is a load in a circuit, lets say with less resistance, then current goes UP and voltage drop goes DOWN. So HIGH resistance means HIGH voltage drop and low current in a circuit. Low resistance means low voltage drop but HIGH current. Can someone tell me if I have this correct?
How do we apply ohms law? How is ohms law useful in designing a circuit? I designed a simple circuit between a terminal holding 2 AA batteries and a led light. The battery got so hot it started to melt! Why did this happen? How can it be avoided? What is the process for wiring circuits?
We know that current is only present when a voltage is applied, but how can voltage exist without current? E=I/R and if I=0 or R equals infinity, then E must equal zero, yet voltage is a potential and can exist with no work being done. So how can one side of the equation =0 and the other side =X?
In an insulator the resistance is practically infinite so no current flows. Also current can exist without voltage in a superconductor because the resistance is zero
@@brianlittle717 I don't think we can apply ohms law very well in those scenarios. 0×∞ is not defined. Also the voltage in ohms law means voltage drop over resistance. You could argue that there can't be voltage drop without current. If you put a resistor in series with the open circuit the voltage drop over that resistor would be zero
I think I see what you’re saying. Voltage is defined as difference in potential. If there is no “difference” there is no voltage. However an unplugged electrical receptacle has voltage, but there’s no load, no current, and no power. No work. I=0 but the other side of the equation equals 120 volts. Maybe ohms law doesn’t apply when there’s no load, or like you’re saying, no resistance drop. Ohms law applies to circuits. If there’s no load, it’s not a complete circuit. Maybe this explains how one side of the equation can be zero and still have voltage.
Great but Ohms's law is actually E=IR where E=Electromotive force measured in Volts. It seems that electrical formulae have been mixed up between what is measured vs. the units of measurement used. (But V=IR is easier for the lay person).
i literally sit in a lesson from 9am til 4.30pm majority of it being about ohms law and come out of the lesson confused because of the guys shit analogy's. i watch a 5 min plus youtube video and understand better than i did in a 7 and half hour lesson.
Watching every single one of your videos and let me just say the amount of details you give us in such a short amount of time is super helpful and covers so much.
Thank you!
Thank you so much. I’m in an audio engineering class studying electricity and this was the unlock I needed!
Studying for an electrical maintenance exam and this helped a ton thank you!
I was having such a hard time getting this to stick in my head. I finally got it. Thank you.
Thank you! I work with neurons and electrophysiology. This video helped a lot!
Glad it was helpful!
Finally a simple explanation. Thank you so much for posting this video.
im not ashamed to say i still draw the ohms law pyramid and im 22 now
😀
Shit im 32 😂
22 is young lol I’m 34 doing this
I’m just now learning this at 22 haha
I'm 56😞. refreshing myself for an assessment on wednesday 🤔
Thankyou for this video, i'm currently doing an auto electrical trade apprenticeship and the material and way in which it was presented in class was for some reason no where near this clear.
No problem, hope it helped!
Buddy im taking the course in feburary, what kind of things should I study before class?
@@OvercomePain this video 🤣
Brilliant explanation
Excellent, clear explanation. Thankyou!
Quick and simple video..Great Job
That helped, I think I'm close to cracking it, thanks.
Thank you Sir , i love your videos and I am learning alot on them
Glad you are enjoying :)
Excellent explanation. Thank you. Im taking an appliance repair certification program and this helped me alot.
Yes, it's a very nice video. Thank you for the reply also!
Thank this helped, currently studying this for a test at my jobs signal department
Very clear & just the facts. Thanks!
thanks so much bro I got a test tomorrow
Ohm's Law is our everything😀 Not only in instrumentation but everywhere where electricity is of use. It's also of high importance and usage in automotive electrical and electronics systems repair.
Thanks so much.... Awesome presentation....very easy to understand...
Glad you liked the video and hope it helps.
4:02 since the M on 48MA is capitalized that would mean you have 48 million amps, lowercase identifies millionth
honestly one of the best explanations
Just started this in class at pennco tech for electrician. I think I get it, I just have to memorize the abbreviations
Brilliant 🤩 thanks.
Thank you!!
good job
Thanks
Thank you so much sir 🙏🙏
Most welcome
Perfect video, thanks 🤘
Glad you found it helpful
is the voltage the same before and after the resistor?
In a circuit with only a resistor connected to a battery the resistor drops all the voltage. The voltage before the resistor is the same as the battery voltage and after the resistor 0V.
The current in the circuit is the same everywhere. If you put a light bulb in series with the resistor it doesn't matter if it is before or after the resistor. The voltage across the light bulb the same everywhere.
Thank you !
Thanks I’ll be teaching it in a week and a half and I didn’t have 10 to 14 minutes for the other videos to watch
So voltage is directly proportional to current and resistance V=IR. So I was thinking about putting a volt meter across a battery. There must be current flow to measure the voltage. So I looked this up and the volt meter has a very high resistance resistor in the circuit and uses ohms law to calculate voltage (from current and a known value of a resistor). So all these years checking power supplies, batteries, etc. I am really checking voltage drop across the battery or power supply with a very high amount of resistance in the circuit to give the maximum possible voltage drop of the power supply or battery. If there is a load in a circuit, lets say with less resistance, then current goes UP and voltage drop goes DOWN. So HIGH resistance means HIGH voltage drop and low current in a circuit. Low resistance means low voltage drop but HIGH current. Can someone tell me if I have this correct?
You have this spot on Darrell. Hope the video helped you!
Thanks
Good😃
No problem
How do we apply ohms law? How is ohms law useful in designing a circuit? I designed a simple circuit between a terminal holding 2 AA batteries and a led light. The battery got so hot it started to melt! Why did this happen? How can it be avoided? What is the process for wiring circuits?
4 minutes and I’m conceited like a pro.
Lo quiero en español
0:52
We know that current is only present when a voltage is applied, but how can voltage exist without current? E=I/R and if I=0 or R equals infinity, then E must equal zero, yet voltage is a potential and can exist with no work being done. So how can one side of the equation =0 and the other side =X?
In an insulator the resistance is practically infinite so no current flows. Also current can exist without voltage in a superconductor because the resistance is zero
But ohms law literally says if voltage is zero then so is current and vice versa.
@@brianlittle717 I don't think we can apply ohms law very well in those scenarios. 0×∞ is not defined. Also the voltage in ohms law means voltage drop over resistance. You could argue that there can't be voltage drop without current. If you put a resistor in series with the open circuit the voltage drop over that resistor would be zero
I think I see what you’re saying. Voltage is defined as difference in potential. If there is no “difference” there is no voltage. However an unplugged electrical receptacle has voltage, but there’s no load, no current, and no power. No work. I=0 but the other side of the equation equals 120 volts. Maybe ohms law doesn’t apply when there’s no load, or like you’re saying, no resistance drop. Ohms law applies to circuits. If there’s no load, it’s not a complete circuit. Maybe this explains how one side of the equation can be zero and still have voltage.
Great but Ohms's law is actually E=IR where E=Electromotive force measured in Volts. It seems that electrical formulae have been mixed up between what is measured vs. the units of measurement used. (But V=IR is easier for the lay person).
You are right @Robin Smith. For practical use and beginners I think using V works fine.
i literally sit in a lesson from 9am til 4.30pm majority of it being about ohms law and come out of the lesson confused because of the guys shit analogy's. i watch a 5 min plus youtube video and understand better than i did in a 7 and half hour lesson.
Electrons flow negative to positive
Over a century... we can't change the 'I' to a 'C' ???
I know.....I've always thought that too
Lewis Daniel Lewis Mark Young Matthew
good job