Electricity Grade 11 and 12: Exam

[@niamomusic1826]

"your teacher probably used the same textbook for the last 634 years" 😂😂😂Thank you for the lesson Kevin🙏

[@kevinmathscience]

Haha :)

[@azaa2188]

Important to know about resistance, taking resistors away in parallel from 16:00

[@youngarrogant6172]

"Your teacher probably used the same textbook for the last 634 years"😭😭😭🤣

[@Tory442]

absolute violation🤣🤣

[@AlphaDaxter1]

6:42 why can't I just use P=V²/R(10ohm) for 8.2.2? we have the voltage and the resistance

[@5_h_a_n_e]

I dont understand why we say current moves from the positive terminal to the rest of the circuit yet in 8.2.2 we used the resistance that is on the negative terminal , how does current reach 4ohms before it 8 and 10 ohms cause that's the direction the flow of charge moves ?

[@nhlakaniphosihle7736]

I'll Always Have Hope On You Kelvin Smith❤️

[@mpumikhoza1905]

why are the 12 ohm and 4 ohm resistor in series?

[@gabriella_sekepane]

Hi sir how do we know which power formulae to use

[@kevinmathscience]

You can use any of them actually :)

[@KgopotsoManaka-g4b]

Hi kevin,i have a question based on que 8.2.2 So the way i did is the following. I calculated the V through the parallel connection & i got (1.07×7,2 = 7,70V). Since V is the same in a parallel connection, i used it to calculate the current through the 10 ohm resistor then i got 0,77A. Therefore power is 5.93W. So am i wrong?

[@KgopotsoManaka-g4b]

@@911_george oh yeah your right i didn't realise it. Thanks buddy.

[@pninasmith9626]

Why does the voltage split in series but not parallel?

[@22ka]

in a series circuit - current remains the same and voltage divides in a parallel circuit- current divides and voltage stays the same it's just the rule

[@AlphaDaxter1]

9:44 why can't I use I=V/R=12/12 to find the current in the 12 ohm resistor?

[@KgalabiMoabelo]

8.2.3 i used the power is equal to current squared times the total resistance FORMULA and got a slightly different result at the end which was 384,69 J. would my answer be considered incorrect??? PLEASE ANSWER, FINALS HAVE ARRIVED!!

[@tsakanimahumani1748]

Afternoon Kevin Sir am getting a different answer in 8.22 when using p=v²/r can you pls explain

[@Collscreativestv]

what did our teachers do to you??? and you always right about them🤣🤣🤣🤣🤣

[@masenukumatshepo1593]

Kevin is it okay if you use a different formula which is Rp = produce ÷sum will you still get the same answer

[@heraa24]

why cant we use the total resistance and voltage for 8.2.3??:( this is so confusing

[@ontha6990]

If I may ask, which between conventional and electric current do we use in gr 12...??

[@kevinmathscience]

We use conventional :) So electricity flows positive to negative :)

[@rainylizardseyes7904]

Sorry sir why won't we consider 12ohm resistor branch and 4ohm branch parallel

[@kevinmathscience]

Follow the path out of the battery,. From that you will see that it begins by going right and up and then makes a split: Some current goes 12 ohm branch, some goes top branch. Then it all joins again on the other side. Then ALL the current flows through the 4 ohm. So the 4 ohm is part of MAIN circuit.

[@heraa24]

why cant we use the total resistance and voltage for 8.2.3?? im so confused

[@KananeloMoepcoe]

SIR I WAS ASKING IS IT WRONG TO USE EQUATION W=V.t in question 8.2.3 and get 360j as your answer

[@RudzaniKhakhu]

Why did we calculate the voltage of 4resistor

[@BigStepper619]

why didn't you just use ratios to get the current ?

[@asancumilekitty2719]

Can you please do one for grade 10

[@dustysparkles999]

Hi sir can you please do science videos for grade 10

[@harper8113]

i never opened the door

[@kevinmathscience]

Haha :) That is fine too :)

[@hannahmboya1142]

Nope my bad but thank you for the lesson 🙏

[@kevinmathscience]

Awesome :) Glad you got it :)

[@Random_guy17539]

Am in grade 12 and when i saw 8.1 i was like yeah minus 2 marks😅