Voltage, Current, Resistance & Power 

0:00 - Introduction 0:57 - Voltage basics 2:40 - Current basics 3:47 - Voltage & Current relation 4:40 - Resistance, Voltage & Current relation 7:21 - Ohms Law (V,I,R) 12:12 - Watts Law (P,I,V) 18:18 - Ohms Law & Watts Law relation 20:23 - Recap 22:08 - Conclusion & advice

Just wanted to say thank you for this fantastic simplified explanation John. You explain the symbology clearly and then show how to calculate each in a simplified manner. It took me a good hour searching to find this, but you have now shown me how I can simply find out the relevant values. Thank you for the time you put in and the clear explanation of the topic without over complicating it. I wish my maths teacher had been like this! ☺

Thank you John, Your videos are excellent. I'm personally very grateful for you time & effort to make these. They truly are a great help. Thank you again Mark.

Thanks John! Great video and thanks for taking out the time to help others

Great videos JW. You explain the practical and in plain English way. You also sound like a BA pilot describing the journey ahead! quite reassuring. Red

for some reason I found this way easier to understand than others I've watched thanks!!

Very clear explanations. Thank you for helping the concepts "click" so painlessly.

Thanks JW for your eloquent and simple explanations regarding all things electrical. I follow your videos with great interest, and I am learning much.

I love your videos. This is a great video for people starting out on electrical engineering. I wish I had you around when I was at college. Love the videos you make too of where you take things apart and explain how they work like trip switches etc... thanks for making them.

Thank you,John! This helped me a lot in my presentation!

Thank's alot, just started an electrician course at home, this is my first day on it and already getting a great understanding

Thanks JW. The best explanation I have ever heard and this has been something of a mental block for me.

John I love your video. I thank you for your time and trouble, you amuse and educate thousands. If you do requests I would love your take on technique of fault finding on circuits and practical testing maybe. Warmest regards

Thanks for your time and trouble, you are actually a very good teacher. I wish you could do more videos on series/parallel on electric motors and alternator wiring? Thanks.

Thank you very much for this memory refreshing video, John.

This video is great video, thanks for taking the time out to shows us

Thank you so much for your video! It was so much easier now that you've explained it.

Wish you was my teacher in school may be then I would have listened and had better exam results,love the presentation even someone as thick as me can now learn the basics thank you mr ward keep up the good work

Thank you for this video, explained very well & helped me pass what i thought was a difficult electrical course. With these simple methods it was actually quite easy:)

Best explanation anywhere on line or classroom well done John, you should be a lecturer if you're not already one ,you've got that rare talent of explaining things in a way students can understand, well done sir

Thanks John for the videos they are very helpful !

great videos...REALLY USEFUL....Cheers John for all your videos.

Thanks for simplifying. Made it look so easy

JW the best teacher! If JW taught at my school I would have put my Nintendo Game boy away.

Thank You John for this video. This was explained very well. I hope you would make more videos on the basics of electricity for example when adding additional light circuits or plug sockets to your main connection and what you need to look out for.

Thanks for the lessons.... Enjoy your lectures very much. Cheers

Thanks for the great vid. Just a question-- In fixing any electrcial gadget, if the resistance is low than what's required, how do we go about it?

Thank you very much. Everything was clear and they were easy to understand.

Sir, I have been pulling out my hair for the last hour or two trying to figure out something that ought to be pretty simple, but for some reason I couldn't figure out. I knew there were two formulas, and that they were connected, but couldn't quite put it together. Then I found your video, and your very helpful links on the times. Your explanation at 18:18 solved my dilemma. Thanks!

John, your a good teacher.

Cheers John. Great video I have a exam on Sunday morning.

Thanks John this was really helpful, cheers

Great vid. Any chance you could explain, series/parallel circuits? also fault finding and testing? Thanks

Sir you are a good teacher. Thank you

Very Very Well Explained. Thank you so much for this video helped me clear a few things up 😀😀😀

Really good video, well presented!

Thanks for your wonderful ,brief and sharp eleboration . It's really help . Thank a lot.

Thanks John Made it really easy to understand. Just subscribed

very well explained you loove your subject I wish you had been my tech. teacher when I was training back in mid 50s thank you.

thanks for your time and effort to share the knowledge

I clicked for the lesson Stayed for the cool shirt Left just a little bit smarter Thank you kind sir

Thank you for making this video. You're a very good teacher. Great to refresh ones knowledge.

your a absolute star mates.....helped me a lot!

Thanks for the information John.

Best video on the subject, thank you.

Joseph from Ethiopia You are a perfect explainer,thank you very much.

Love your video, i seen this type off wall tons off times... I noticed you never put the triangle round, right away, that awsome because the more lines added the worst it is for my head to understand what I'm looking at... The less information fir my brain when explaining the better information gose in... Thus video where you used both triangle help me loads how they both work together! Any more like this be much appreciated

I rely thank your generous and valuable knowledge you share us .

Great refresher. Purse since my physics classes 30 years ago. :)

Big thanks JW... top man👍

Thankyou very much, you have really helped me. Cheers from 🇭🇲👍🏻👌🏻👏👏👏

gcse physics tomorrow. last exam. this was class, but your tshirt was even better.

iam so happy. stayblessed

This helped with my science revision

Great video as always

Excellent video, let me tell you why . You keep lofty theory in bite size installments. You also write it all down, this slows it down and thus, gives our mind enough time to assimilate the information . Instead of intimidating us with knowledge through a clouded window, you keep the transfer of the data clear .

How do u test coax and what setting do you use?? I have a commercial Electric MS8301A Digital multimeter

awesome vid!! helped me with homework so much much thanks

Explains everything in a lot of detail big help cheers

very clear explaination sir.they are very helpful thanks for this video.

Brilliantly explained thank you very much

Another great video John.clear and concise.if you get time will you do a video on 'Clean Earths' i get confused with what should and shouldn't be on them.Thanks.You do great work

You would make a brilliant teacher!

that was great and informative- thanks John!

Excellent tutor, please post more of it.

this actually helped me with my homework.THANKS!!!!!

Very good video. Thank You.

Excellent explanation.. Made it very clear and logical. Many thanks

this man explained 2 full 1.5-hour classes in just 20 minutes. Respect.

I have a 150/watts led... Power to 12 volts PSU ....how do I need a resistor...? How many ohms.may I put to my led? Thanks for reply

Thanks a lot Sir 🙏 I find it really really helpful

Beautifully explained!

Nice. Thank you. My main problem is finding out how long I can run a power amplifier from a wh battery so I get confused between amps and amps!

Your video make me to easily understood relationship between VIRP thank you

Great video!

JOHN WARD what is the formula to get "how much current in amps" can a 4700uf cap can hold from B+450vdc from a linear power supply?

Another great video!!

In welding when they say "there has to be 1amp of current for every thousandth inch of material thickness" can explain little more?

Thanks for a good, informative video. :)

Hi John, Thank you for your video. This is obviously for AC correct? Does this apply to DC? Example if you connect 6 x 6 volt 4 amp batteries together in a way that makes 36 volts at 4 amps. What is the resistance and the watts supplied? Regards Kurtis

This is late at night, and it's probably a dumb question but suppose I know the Power and Resistance, how do I go about finding the amps or volts?

Great lesson,easy to understand even for someone who a foreigner

Excellent. Thank you.

Thanks, this helped.

great job explaining, i dof my cap to you sir...

Good your formula is easy to understand .

brilliant video....

thankx alot, very helpful sir. #subscribed 👌

Great job👍🏽

Nice teachings boss

When I try to relate these laws with the transformer which rise the voltage and and decrease the amp and vice versa .. my brain can not accommodate it 😅!

Great professor.

So clearly explained............................ cheers

thanks, mr,John

Aap Jo be bola sur ka upar se nikal gaya Lekin magic triangle and magic circle bahut useful hi Thank you sir

Let's say i have a older automotive relay that does not have an amp rating on it ,but i know it came out of a car with a 12 volt system. Are you saying i can check the resistance across pins 30 and 87 (pins 85 & 86 are the coil) That way i would have two of the values needed to find the amp rating?

Hey, John, i have got 2 bulbs, 6v / 55w, each, if i put them in a series, and connect to a 12 v supply (battery), What will be the Amps drawn?

Great lesson, easy to understand! :-) What about a Vandagraph that can make thousands of volts but nearly no current, how do that fit in if voltage and current raises together?

I learned The liked button works Keep it up to many supporting you

Can you show cable calculation. How to calculate length and diameter.