Resistors in Parallel - How to Find Total Resistance for Any Number of Resistors

[@GaryB1980]

Your content really joins up the gaps in my college training! Thank you.

[@JoeRobinsonTraining]

Aw, my absolute pleasure Gary and thanks so much for the donation, it is very much appreciated. 😊

[@randomj6188]

This channel is a great idea in conjunction with GSH Electrical. Keep it up!

[@JoeRobinsonTraining]

Thanks Jamie, just really hoping that it'll help people studying to understand the subject a little better. Stay tuned for more!

[@randomj6188]

@@JoeRobinsonTraining Well I look forward to more great content and in depth videos on the theory side mate. Thanks!

[@lsnogaming2893]

Jamie I also follow both channels these guys are amazing 👍

[@wagabira]

hi Joe , this is my 14th video of yours that I see . I'm in an electricians course and I must say you are much clearer then my tutor . thanks a lot, you have great content and knowledge . keep teaching us please . all the best

[@wallbouncer9655]

Another world class video from Joe Robinson Training 👍

[@tomcov5986]

This has been such a useful video explaining finding total resistance being explained. Thank you.

[@vievlogs589]

I love your catchphrase at the end 👍

[@JoeRobinsonTraining]

I was taught by the best Vienna!

[@gbelectricks]

I bought a new Casio calculator and was disappointed to discover no 1/x button. I just realised about the x-1 thanks to this video. Cheers Joe Btw when you get the initial answer on the screen (1/rt) if you press x-1 it automatically converts to the final rt👍you should do a video on tips involving the Casio calculator with regards to electrical equations👍

[@Sergey3023]

OMG, mind blowing .Can thank you enough for this easiest way to calculate total resistance of resistors is parallel .Bravo

[@JoeRobinsonTraining]

My pleasure!

[@earlyyearslearningisfun]

These videos are truly amazing 👍

[@teyronnewreality]

Incredibly helpful

[@JoeRobinsonTraining]

Glad it's helping. 👍

[@simonlloyd7557]

My 'teacher' made this so uneccessarily complicated with garbled babble and contradictory information. This explanation is clear, methodical, progressive and concise.

[@JoeRobinsonTraining]

Glad it helped Simon. 👍😊

[@craigemmott4976]

I paused before you finished your first calculation to see if I remembered how to do it. All I did was flip around the equation. I'm not as stupid as I think! 😃

[@JoeRobinsonTraining]

Nice work Craig, I'm glad it's all coming back to you. Thanks for the support and the comments. Keep it up and if you have anything you'd like to see covered please let me know!

[@n4thb4dc0]

​@@JoeRobinsonTraining i paused too to work it out hehe

[@lsnogaming2893]

Thanks so much for offering up these quality learning resource materials 👍

[@markadams3746]

Your videos are very helpful thanks 😊

[@jacobgordon3381]

Loving it

[@JoeRobinsonTraining]

Thanks Jacob. Keep watching.

[@IAAITKEN]

Never been good at fractions - and Iphone doesn't calculate them with native app. Is there a better way to do it with decimal only? I have: 1/27(0.037037) + 1/10(0.1) + 1/10(0.1) = 0.237037 - - - 0.237037 * 1000 = 237.037/1000 - - - flip over to 1000/237.037 = 4.218751 = 4.22ohms. Brilliant videos, just what I've been looking for without them being 15yr old videos on youtube!

[@JoeRobinsonTraining]

Hi Iain. Thanks for the comment. Your iPhone has a reciprocal button if you turn it sideways. It's marked 1/x. If you type the bottom number of the fraction first then press 1/x it gives the decimal equivalent. So your button press would go 27, 1/x, +, 10, 1/x, +, 10, 1/x, = then pressing 1/x again should spit out the total resistance. Hope this helps and please keep watching!

[@anthonymiller880]

⚡️

[@Khanjan-si8me]

Love it thank you ❤

[@JoeRobinsonTraining]

My pleasure. 👍

[@eddprice4571]

Hi Joe great video it gave me a head start into understanding how working out the resistance. Could I also do a video on mixed circuits please with both parallel and series resistors please?

[@JoeRobinsonTraining]

Thanks for the suggestion Edward, I'll add it to the list. 👍

[@identitywithheld1027]

I'm grateful for this

[@cameronmclaughlin7733]

Bless🙏🏻

[@JoeRobinsonTraining]

Thanks Cameron.

[@cubingperson]

Fantastic videos with great explanation in English ;) Just missing few hilarious jokes LOL.

[@mikeybasham5337]

Okay, this is epic...

[@JoeRobinsonTraining]

Thanks Mikey, stay tuned for more!

[@lyndamparkin7438]

Hi Joe just wondering is PRODUCT/SUM rule to be used with 2 parallel resistors and the reciprocal rule to be used with more than 2? Also these videos are great and a massive help in my studies 👍🏻👍🏻👍🏻

[@JoeRobinsonTraining]

That's the general rule Lyndam yes. Although the reciprocal rule can be used for 2 resistors also and it is possible with a few more steps to repeatedly use product over sum with more than two resistors, but it gets a bit confusing.

[@jeremykemp3782]

Hi Joe, could you please explain why you would not just use a 5 ohm resistor in series instead of using 3 larger resistors in parallel to get a lower resistance?

[@leem270]

Thank you!

[@jamesward9570]

Brilliant need that calculator

[@GamerLozT]

not many people seem to do this but i would do 1 over, 1 over 10 + 1 over 18 + 1 over 27 and always get the correct answer

[@christimms9379]

Hi, can anyone tell me what calculator this is, cheers

[@JoeRobinsonTraining]

Hi Chris, it's the Casio fx85gt plus, but it's been discontinued now. Its replacement is the Casio fx85 GTX, see this video for more details... kzbin.info/www/bejne/m4SUi3ipYrekhac

[@christimms9379]

@@JoeRobinsonTraining thank you.

[@Ressy66]

I've always wondered why its called 1/RT since its not the total value yet its more subtotal? 1/RT = 1/R1 + 1/R2 + ... RT = 1/RST = ... :) But nice explanation , though I think the basic divides are simpler than fractions, buts thats me and my cheap phone calculator lol

[@JoeRobinsonTraining]

Good observation, technically 1/RT is the reciprocal of RT, you could calculate it as RT=1/(1/R1+1/R2+1/R3... etc.)

[@breakdance4cash228]

Ty

[@ahmednor5806]

🙏🙏🌹🌹

[@anthonyminchinton3399]

Are you saying you have to buy a fancy calculator or an iPhone to be able to do this calculation? I have seen this done on a basic calculator using only division and add. Disappointed in your explanation requiring a fancy calculator hence the thumb down.

[@JoeRobinsonTraining]

Sorry you felt the need to dislike my video. I'm not saying you need to buy an iPhone to carry out this calculation, I wouldn't recommend anyone buy an iPhone as I believe you can get equivalent or better functionality from cheaper smart phones. I wouldn't recommend you buy a smart phone for the course that this video is designed to help with, this is because you can't take a mobile device into an exam. That's why at no point in the video do I mention iPhones or smart phones. That only leaves calculators, indeed you could do this calculation on a cheaper calculator, the problem is the input becomes trickier on some models without a reciprocal button. Also as the course continues you'll need to carry out other functions such as trigonometry which would be trickier or even impossible on cheaper calculators. The latest version of the calculator featured in this video can be bought for about £11 on Amazon and can often be bought for even less during "Back to School" promotions. This is a very reasonable investment in a device that will make your experience on electrical courses much easier. I have been recommending these devices since 2008 when I started teaching and will continue to do so. I hope this explanation eases your disappointment.

[@anthonyminchinton3399]

First my apology for the misdirection, I should have said SmartPhone rather than iPhone. Second my apology for the thumb-down (now corrected) as I did not realise a scientific calculator was required because of further lessons in this course. At the time I just needed a quick method to work out a problem I had at work and was a bit stressed. This is not my normal kind of work. Finally thank you for uploading these videos giving free education - please keep it up, they are most appreciated - eventually.

[@stefan359t]

its not a fancy calculator is a basic but useful casio that does the job. the x-1 or 1/x is a handy button. You cant use a iphone or any mobile in the exam.

[@JoeRobinsonTraining]

Thanks for the response it's very much appreciated Anthony. I understand the feeling of being under too much pressure and stress, hope things have eased up a bit for you now. Take care matey, plenty more content on the way. 😊