I just want to say that you are the greatest teacher ever! I missed two weeks of school because of covid and I still have to take my Unit 5 test tomorrow. You just saved me from 4 google slides that were 50 slides each. Thank you so much
There are many ways to solve circuits questions, so anything you use that gets you to the right answer is fine. I like to see it as a puzzle to solve, and sometimes you don't get to the answer directly, but instead need to solve other parts of the circuit (figure out p.d. or current or resistance somewhere else) and that gets you closer to what you need.
Hi! I thought that the resistance has to add up to the amount of potential supplied by the battery, in the example you gave it obviously doesn't (resistance adds up to 4, while there are 8 volts). So I'm a bit confused?
Resistance in series adds up for TOTAL resistance, but it does not need to equal the potential difference ("voltage"). The one thing that's important though is that the total p.d. drop in the circuit equals the p.d. gained by the battery.
Wouldn't the power be 2.91 ohm because Rp is 2 and the the other one is 20 so v^2/r is 64/22 because in a series you just add the resistance so 2 + 20 = 22?
There is a mistake in your calculation in the last example where you miss wrote the resistance as 2 instead of 20. I hope you can correct it. Thank you
![Kirchhoff's laws [IB Physics SL/HL]](http://i.ytimg.com/vi/Yrlzbq2fHRQ/mqdefault.jpg)
![Kirchhoff's laws [IB Physics SL/HL]](/img/tr.png)
![Circuit analogy 2 [IB Physics SL/HL]](http://i.ytimg.com/vi/810b--x5BJ0/mqdefault.jpg)
![Internal resistance [IB Physics SL/HL]](http://i.ytimg.com/vi/SIFdvIxmW-c/mqdefault.jpg)
![Important definitions [IB Physics SL/HL]](/img/n.gif)
this guy makes the academic comeback insane fr
Hahah....this guy is really thankful for your comment :). -Mitch
Real
I just want to say that you are the greatest teacher ever! I missed two weeks of school because of covid and I still have to take my Unit 5 test tomorrow. You just saved me from 4 google slides that were 50 slides each. Thank you so much
I'm so glad this helped you! Hopefully your test went well! Cheers, Mitch
you're such a life saver, watching these before my physics hl unit exam
Glad I could help - good luck on the unit exam! You show them who's the boss! :) Cheers, Mitch
Im trying to learn all HL Physics in a couple of days, thank you for being the teacher I needed. Academic comebackk
You can do this! :)
at 1:14 the way i actually yelled "AMPERES" at the screen and then right after you said 'i hope you're yelling at the screen'
Hah, nice!
Wow! Thank you SO much, you are really a great teacher :)
rly saving me tons of time (recommended teaching time by the ib is 6 hrs)
I'm so happy to help! Cheers, Mitch
11:43 is it possible to solve this question by using the current method?
There are many ways to solve circuits questions, so anything you use that gets you to the right answer is fine. I like to see it as a puzzle to solve, and sometimes you don't get to the answer directly, but instead need to solve other parts of the circuit (figure out p.d. or current or resistance somewhere else) and that gets you closer to what you need.
Hey,
Thank you so much, great job on showing how this works!
Hi! I thought that the resistance has to add up to the amount of potential supplied by the battery, in the example you gave it obviously doesn't (resistance adds up to 4, while there are 8 volts). So I'm a bit confused?
Resistance in series adds up for TOTAL resistance, but it does not need to equal the potential difference ("voltage"). The one thing that's important though is that the total p.d. drop in the circuit equals the p.d. gained by the battery.
Wouldn't the power be 2.91 ohm because Rp is 2 and the the other one is 20 so v^2/r is 64/22 because in a series you just add the resistance so 2 + 20 = 22?
It's 2.0 not 20*
It’s 2.0 not 20*
There is a mistake in your calculation in the last example where you miss wrote the resistance as 2 instead of 20. I hope you can correct it.
Thank you
The resistance was meant to be 2.0 ohms. Sorry it looked like it was 20 ohms with how I wrote it :)
Thanks a lot! Great video
This one might be the worst meme of the series, but is good to remember that resistence is measured in ohms