Physics | Electric circuits | Energy and Power

Electrical devices consume energy. But how is that energy calculated? How can we calculate the power delivered by a battery? This video will teach just how to do that... Another video on the cost of using electricity will be follow for IEB candidates.

Enjoy!

[bhutmanando]

I got myself 89% in physics all thanks to you sir

[misbahali]

sir, can you do a video on the use of diodes for half and full wave rectifications?

And yes, thank you for making physics bearable!

stay blessed :)

[victornkgweng]

Mlungisi I just want to thank you for the chemical equilibrium lesson sir I got all the marks on my june examination I wrote last week❤️💯

[sydwellrangile]

Sir . This video is not relevant to me bc it has internal resistance and our teacher said at grade 11 she does not introduce internal resistance the department introduces it in grade 12 😭😭😭

[NoluthandoMbatha-jlqe]

😢 I'm struggling with physics please 🙏🥺 help me
I will Love to improve my marks on this subject

[BeingBahle]

But how is the voltage = emf, when the switch is closed ? Im confused, instead i used p=w/t

[afnaantoefy]

hi sir, don't they ask cost in the nsc finals exams ?

[nismav]

You said we can't use the equation "W=VIT" but we can by finding the potential difference across the resistor by using the formula "V=IR", which I am sure we all already know I guess😉. I just wanted to highlight that part for some students yet to watch the video and read the comments. Thank you for the lesson👍😉💞

[roshaanghani]

sir can you please make one full video of you going through an IEB final paper before our final exam? it is on the 26th of October

[bryangomez]

Meneer. i have a ask.😆Do you use emf voltage or external voltage when calculating POWER? and why?

[SimamkeleSikali]

Me at grade 11 starting grade 12 electrical circuit

[moneuamber]

For number 2, the totalresistance, was it not 16.5

[shasha]

My good Sir I'm struggling on paper 2 last topic (Fertilizers). Please help me sir🙏

[Nobars-zq]

Could you please help, I still do not understand why we didn't use the internal restistance to calculate the total power of the battery?

[masitembedudula]

Hello sir, I had a problem with #3 .. so I just calculated using p=v²/R ( for R I added both internal and external resistance) and got the same answer ( well yours is 7.8, mine is 7.783) could this just be a coincidence..? I hope you see this question and respond.. thanks in advance

[banzokubheka]

Patiently waiting for the cost video❤️

[giannisnyderss]

Goodday sir! Do we use emf for (v) in the power formula? 🙆‍♂️

[jabulilejulia]

Sir I don't understand why you used emf instead of Vext to calculate Power.Can you kindly give some explanation on that 🙏

[misst]

Hi Sir, on 16:16 why couldn't I use P= W/t?

[twistbubbles]

Sir I'm confused by when we have to calculate the power dissipated by the battery what if we calculate the voltage of the battery and then use tht voltage in the formula to get to the answer?