Ohm's law, resistance and power [IB Physics SL/HL]

We're so excited to be able to share our exams with you!

Cheers, Mitch

[kofiampo]

this guy makes the academic comeback insane fr

[hoang-yennguyen]

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

[rituanand]

you're such a life saver, watching these before my physics hl unit exam <333

[onelastmanstanding]

Im trying to learn all HL Physics in a couple of days, thank you for being the teacher I needed. Academic comebackk

[taniaarelialvarezreyes]

Wow! Thank you SO much, you are really a great teacher :)

[amymikhail]

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'

[ccl]

rly saving me tons of time (recommended teaching time by the ib is 6 hrs)

[JunenOwak]

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?

[nitindasari]

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

[aboudtartir]

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?

[davidexeli]

Hey,
Thank you so much, great job on showing how this works!

[Angad-lwei]

11:43 is it possible to solve this question by using the current method?

[Alfonso.]

This one might be the worst meme of the series, but is good to remember that resistence is measured in ohms