IGCSE Physics Revision: Unit 4 Electricity & Magnetism | for Cambridge IGCSE 2023 Syllabus

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  • Опубліковано 14 гру 2024

КОМЕНТАРІ • 359

  • @maryamaurangzaib7176
    @maryamaurangzaib7176 Рік тому +701

    Electric charge 3:58
    Electric field 5:43
    Charging insulators by rubbing 8:11
    Charging conductors by induction 9:26
    The electric circuit 13:20
    Circuit diagram 15:39
    Voltage, current and resistance 16:21
    Measuring voltage and current 22:53
    Ohm's law 23:48
    Resistance of wires 29:27
    Calculating electric power 31:05
    Kilowatt-Hour 34:35
    Resistor types 38:29
    Diode 42:00
    IV Graph 46:57
    Series connection 48:55
    Parallel connection 52:45
    Advantages of parallel circuit 57:32
    Potential divider circuits 58:48
    Mains electricity 1:05:01
    Fuses 1:06:52
    Circuit breaker/trip switch 1:09:50
    Earth wire 1:13:08
    Magnetism 1:14:30
    Magnetic field 1:16:03
    Magnetic field of conductors 1:19:23
    Right hand grip rule - wire 1:20:42
    Magnetic field of solenoid/coil 1:22:17
    Right hand grip rule - coil 1:23:33
    Relay 1:24:50
    Speakers 1:25:54
    Megnetizing and demagnetizing 1:27:08
    Force on a current carrying conductor 1:35:06
    Fleming left hand rule 1:36:53
    DC motor 1:38:50
    Electromagnetic induction 1:41:03
    Lenz's law 1:43:32
    AC generator 1:49:41
    Transformer 1:52:09
    Transmitting Electricity 1:56:25
    Transformers - power 2:00:10

  • @smithgretzky5989
    @smithgretzky5989 Рік тому +300

    This great man did what a school tries relentlessly to do in 2 years, in literally half a days' worth of time.

    • @atwumer
      @atwumer 6 місяців тому +1

      my exam’s in an hour

    • @straight.2503
      @straight.2503 4 місяці тому

      @@atwumer how'd it go ?

    • @atwumer
      @atwumer 4 місяці тому +2

      @@straight.2503 really good, hope i get an A*

    • @iloveyoumorethanthemoon
      @iloveyoumorethanthemoon 3 місяці тому

      @@atwumer what did you get and can you please tell me how you studied

    • @atwumer
      @atwumer 3 місяці тому +9

      @@iloveyoumorethanthemoon i got an A* Alhamdulilah

  • @Saif-cc5jq
    @Saif-cc5jq Рік тому +306

    Good luck to the first batch including myself that's doing space physics this year. Unarguably the batch with the most odds stacked up against them.

    • @Hoellz
      @Hoellz Рік тому +5

      Space physics can't be the biggest deciding factor though, can it?

    • @Saif-cc5jq
      @Saif-cc5jq Рік тому +38

      @@Hoellz space phy new unit, new additions to all syllabuses, shitty timetable, new bio style que. Need I say more ?

    • @Hoellz
      @Hoellz Рік тому +4

      We gotta cope

    • @nysanayeem4106
      @nysanayeem4106 Рік тому +10

      istg we are not only gonna get non lenient examiners but also new editions in the syllabus. we are the unluckiest batch on earth

    • @user-cu3fh5hn4t
      @user-cu3fh5hn4t Рік тому +1

      @@Saif-cc5jq wdym by new style of questioning
      for bio??

  • @hafsausman4725
    @hafsausman4725 Рік тому +47

    13:17 circuit
    16:22 voltage, current, resistance
    34:32 kilowatt hour
    46:52 IV graphs
    48:47 resistors in series
    59:18 potential divider circuit
    1:25:11 relay
    1:38:45 dc motor
    1:40:52 electromagnetic induction
    1:43:51 lenz's law
    1:47:36 angle at which current is cut effects
    1:49:36 ac generator
    1:52:15

  • @parthaarnav3469
    @parthaarnav3469 Місяць тому +3

    00:04 Changes in the IGCSE Physics syllabus for 2023
    02:15 Electricity and Magnetism
    06:52 Understanding field strength and uniform fields
    09:31 Charging a metal by induction
    14:41 Resistance slows down charges, releasing electrical energy into light bulb
    17:20 Voltage has two names: potential difference and EMF.
    21:46 Materials with high resistance have lower current flow, while low resistance allows for higher current flow.
    24:00 Maintaining constant resistance is crucial in electrical circuits
    28:24 Resistance affects current, not voltage
    30:39 Power calculation in electricity using voltage and current.
    35:10 Calculating energy cost based on consumption in kilowatt hours
    37:14 Understanding energy expenditure and costs in electricity consumption
    41:36 Diodes allow current to flow in one direction only.
    43:43 AC and DC currents explained
    48:22 Series and parallel connections affect resistance, current, and voltage.
    50:34 Voltage distribution in series and parallel circuits varies based on resistance
    55:01 Explanation of voltage sharing in series circuits
    57:11 Advantages of connecting components in parallel
    1:01:16 A variable potential divider controls the voltage across a component.
    1:03:27 Safety precautions and control of voltage in electrical circuits.
    1:08:06 Fuses and circuit breakers protect against current overloads.
    1:11:35 High current protection and earth wire in household electricity
    1:16:02 Magnets have a magnetic field just like electricity with electric fields.
    1:18:15 Compass plotting method for determining magnetic field direction
    1:22:29 Electricity can also create magnetism
    1:24:37 Electromagnet applications: relay and speakers
    1:28:42 Magnetically magnetizing steel efficiently without hammering
    1:30:42 Magnetizing and demagnetizing methods
    1:34:47 Force on a current carrying conductor due to interaction with a magnet.
    1:36:51 Understanding Fleming's Left Hand Rule
    1:41:15 Moving a wire through a magnetic field generates electricity through electromagnetic induction.
    1:43:20 Understanding Fleming's Right Hand Rule in Electricity Generation.
    1:47:59 Movement of wire or coil in a circle generates alternating current
    1:50:01 Human-generated electricity through exercise
    1:54:39 Step Down Transformer reduces voltage for safe transmission.
    1:56:51 Using a Step up Transformer to decrease current and reduce heat in cables.

  • @huskyfan201
    @huskyfan201 6 місяців тому +29

    All the best to this year's IGCSE candidates, including myself. Space physics is my only favourite chapter for the whole Physics syllabus. I am personally glad it is added to the syllabus (better than having barometers and manometers)

    • @localbookworm5384
      @localbookworm5384 3 місяці тому

      Honestly yes like I was so confused when I tried to understand things like logic gates and manometers

    • @FatimaFarukh-i8y
      @FatimaFarukh-i8y 17 днів тому

      frrr space physics is soo interesting, so glad i was added

  • @AwesomeDooshi
    @AwesomeDooshi 11 місяців тому +45

    I actually have started loving physics because of your videos. Thank u 🙏

  • @purbitasaha930
    @purbitasaha930 Рік тому +6

    1:14:08 Magnetism

  • @devikas.9088
    @devikas.9088 Рік тому +66

    you should solve past paper questions too, that would be fun to watch!

  • @khizerahmad999
    @khizerahmad999 Рік тому +24

    Very good explanation. Not long, but very well explained. This video helped me to prepare for my school examination for physics.

  • @nevaehjol9319
    @nevaehjol9319 Рік тому +57

    sir u explained a concept that I struggled with for two years, why didn't I know you earlier

  • @centric145
    @centric145 Рік тому +15

    You are a life saver sir.Thank u a lot

  • @Adam-dn4bq
    @Adam-dn4bq Рік тому +12

    I am amazed by your explaining Mr.Mohamed thank you so much

  • @abdullahalali2836
    @abdullahalali2836 Рік тому +15

    you are a hero
    this will save a lot of time
    thank you!!!

  • @cooller355
    @cooller355 Рік тому +38

    oh my days, god bless u. My teacher is so trash at explaining and u literally made me understand everything in one video, i love you. ❤❤❤❤❤❤ i will subscribe and rely on ur videos, and i will get a 9 on my igcse cuz of u. ur students r so lucky

    • @fanta.k.camara6537
      @fanta.k.camara6537 6 місяців тому

      Did you get a 9

    • @EditsCR7AndRealMadrid
      @EditsCR7AndRealMadrid 2 місяці тому

      Congrats, I mean if u got 9

    • @ZeeKho
      @ZeeKho 12 днів тому +2

      Don't ever disrespect your teacher no matter how bad they teach you don't call him/her trash they must be working hard and giving full from their side

  • @maahishah773
    @maahishah773 Рік тому +17

    Thank you soo much sir!!! You made this topic 10 times easier to understand. Once I understood the concept, I started having a lot of fun in learning topic instead of thinking it was deadly and extremely difficult. It's all thanks to you!!

  • @neha_reddy121
    @neha_reddy121 Рік тому +18

    I have my physics preboard in a week! You explained a chapter I had lots of doubts in so effectively. Thanks a bunch!

    • @K3LV1NZ
      @K3LV1NZ 2 місяці тому +1

      I have mine on wednesday next week and I was about to sacrifice this topic bc i didnt understand it and thanks to him i now fully understand it and btw if u dont mind was the physics paper hard?

    • @shaizamaryam2002
      @shaizamaryam2002 Місяць тому

      @@K3LV1NZhow did it go

    • @K3LV1NZ
      @K3LV1NZ Місяць тому +1

      @@shaizamaryam2002 imma give an overview, it was like my paper was on fire then my hand was on fire and then everything else was on fire and then i got cancer and died. Thats how it went (kinda hard)

    • @shaizamaryam2002
      @shaizamaryam2002 Місяць тому

      @@K3LV1NZ Damn I’m gonna appear in m/j 2025 and now I’m scared lol.But hope you get an A* dw

    • @K3LV1NZ
      @K3LV1NZ Місяць тому +1

      @@shaizamaryam2002 dont be scared bro just dont commit the same mistake as i did, i played the whole school year and studied the whole syllabus like 1 week before the exam, as long as you understand the syllabus fully one month before the exam u are goos

  • @Allahthesupreme1701
    @Allahthesupreme1701 11 місяців тому +6

    This man is my first sight love because the way of the expression and teaching skills are remarkable best physics teacher in the world

  • @cappybaraeats
    @cappybaraeats Рік тому +6

    omg no wonder i got so confused with the current direction stuff because like they literally said electrons but then the direction is the opposite?!?! like it was literally contradicting themselves... luckily i found you teacher omg i finally get it

  • @AnnAnn-oj4ct
    @AnnAnn-oj4ct 6 місяців тому +3

    Sir, you really are a life saviour !!! You just explained all at once in 2 hours which I've been struggling for two years... I'm so glad that I found you earlier before my final exams is getting close and you kinna make me love Physics now which I've been considering as my archenemy loll... Thankyou so much Sir! May God bless you Sir!

  • @omardoper8193
    @omardoper8193 Рік тому +3

    jazakallah khair Mr Mohammed thank you!

  • @raramaisharmainechari1425
    @raramaisharmainechari1425 Рік тому +4

    You really are a genius
    Hats off to you

  • @cappybaraeats
    @cappybaraeats Рік тому +34

    im so angry at myself that i only found this channel now when Im literally having igcse phy exams in 4 days .

    • @i_am_blue1619
      @i_am_blue1619 10 місяців тому +9

      same but i found it in the morning of my exam

    • @holycheeshus
      @holycheeshus 7 місяців тому +1

      How did it got?

    • @cappybaraeats
      @cappybaraeats 7 місяців тому +8

      @@holycheeshus this guy is amazing honestly I got A* for physics ❤️❤️❤️❤️❤️❤️

    • @Mahmood0419
      @Mahmood0419 7 місяців тому

      @@i_am_blue1619me just 1 day before

    • @jennie08._
      @jennie08._ 7 місяців тому

      @@Mahmood0419 sameee

  • @maryambint9973
    @maryambint9973 8 місяців тому +2

    I literally hated magnetism as I couldn’t understand it, but now it’s so easy and everything’s clear. Really love the way you teach 🥰🥰

  • @7tiax_shimndo10
    @7tiax_shimndo10 Рік тому +4

    I must admit, you're an excellent Teacher!

  • @Marony1142
    @Marony1142 7 днів тому +1

    You seriously maybe physics soooo fun 😭😭 thank you so much!!!!

  • @Spex07
    @Spex07 Рік тому +7

    Thank you so much Mr Mohamed for such a detailed explanation, this solved all my queries.

  • @al3firit
    @al3firit Рік тому +4

    You're a lifesaver !

  • @kxvld595
    @kxvld595 Рік тому +7

    tysm for your videos, honestly way too good we wrote our physics paper today variant 2 (p4) and it went great

  • @Piqaiso
    @Piqaiso Рік тому +5

    i am forever in your debt teacher. thank you for the great lesson

  • @muiisalvatore2955
    @muiisalvatore2955 Рік тому +5

    I just want to thank you so muchhh..... this channel helped me a lot .I never really liked physics but had to do it anyways and i finally finished today and i used ur videos to revise.Helped a ton !

  • @simritnanda7395
    @simritnanda7395 Рік тому +2

    you are a phenomenal teacher and i am so grateful to be able to have access to your lectures, you make learning entertaining and effective. always keep teaching!

  • @xepherart2153
    @xepherart2153 Рік тому +3

    thank you so much sir It helps with grasping the topics easily and developing an understanding which helps in revision or practicing in your terms Thank you so much !!

  • @weetabix921
    @weetabix921 Рік тому +2

    Thnanks a lot.. great recap and revision before finals

  • @Mujiboy
    @Mujiboy Рік тому +2

    I am so glad you got recommended. Thanks for everything.

  • @rufirizwan2542
    @rufirizwan2542 Рік тому +5

    you make studying so fun, extremely glad i found your channel❤

  • @prof-pras
    @prof-pras 3 місяці тому +5

    Me watching this video the 4th time to finally understand everything once and for all!!

  • @kehandezoysa357
    @kehandezoysa357 11 місяців тому +2

    thank you sir

  • @studygaming1552
    @studygaming1552 Рік тому +2

    sir you are great

  • @inderbirsingh5463
    @inderbirsingh5463 2 місяці тому +1

    Sirrr, i have my mid term exams tomorrow and due to shifting schools, i am not done with the syllabus which is coming out in the exam, your videos helped me learn all of the concepts super fast.
    You are the third teacher i have met in my life so far who teaches physics with so much enthusiasm. Thanks a lot sir, u aint got the name mohammed ali for nothin. W

  • @EditsCR7AndRealMadrid
    @EditsCR7AndRealMadrid 2 місяці тому +1

    Thanks mister, like in school my teacher is bad, Im pre- IG though, we were studying these things at school, although Im the best in my class, I still understood almost nothing. But I heard about your channel from a friend who had the same problem before me, your videos really helped, especially this one. I will watch the next chapters' Videos too.
    EVERYBODY SHOULD SUBSCRIBE, AND MAKE THE PHYSICS A LOT EASIER

  • @Lomash287
    @Lomash287 Рік тому +3

    OMG, THE LEGEND IS BACK!!

  • @nooraluvsfood
    @nooraluvsfood Рік тому +2

    Best physics teacher everr

  • @Lord_Of_Demise
    @Lord_Of_Demise 7 місяців тому +1

    27:33 and 27:38 "Whroom, Super Fast!" 😂

  • @NihalDevalapally-mj3pc
    @NihalDevalapally-mj3pc 9 місяців тому +1

    Thank you so much for making these videos man. It helped me and my friends a lot and made our final paper very easy. I appreciate it man. One small recomendation, you should start making videos on past papers too.

  • @tia1294
    @tia1294 Рік тому +4

    Thank you so much for your precious time sir. I genuinely enjoyed the video while understanding all the concepts.🌷

  • @reanimatorism
    @reanimatorism Рік тому +3

    you've literally saved my life

  • @afifhossain5345
    @afifhossain5345 10 місяців тому +1

    59:45

  • @chothar8211
    @chothar8211 7 місяців тому +1

    Tr why did u say the higher the temperature the higher the resistor and the lower current in 48:38 even tho u said if the temperature is increased the resistance will decrease in mentioning the thermistor

    • @bluednbfu5678
      @bluednbfu5678 7 місяців тому +2

      In the graph, the resistor was a metallic conductor that's why when the temperature increased, the resistance also increased but before that he was talking Abt thermistors which are non metallic, which decrease the resistance as they gain temperature

  • @mohsenelshazle7220
    @mohsenelshazle7220 8 місяців тому +1

    My physics teacher could never w allah
    Thank you so much mo you are a hero for real

  • @varunniilesh
    @varunniilesh 3 місяці тому +1

    Mo Ali, I can't thank you enough! I have been struggling with physics, especially space and general topics, because of bad teachers, but your explanations made everything so clear and easy to understand. You stick to the syllabus without all the extra content that just confuses me, unlike my textbook. Plus, your funny jokes make learning so much more fun,your videos never get boring!! I have my exams next month, and I am aiming for an A* in physics, and if I get it, it’s all thanks to you! LOVE YOU TEACHER!
    Please consider making videos for A Level physics as well, It's going to be really helpful for me in the future.
    ♥🥰

  • @AniqaRizwan-u1w
    @AniqaRizwan-u1w Місяць тому

    Hello sir.Can you please tell explain how resistance and temperature are inversely proportional 40:06

  • @ugyenthinley8742
    @ugyenthinley8742 Рік тому +1

    Hello sir, I have been enjoying your teachings 😊 everything you have explained in a very simple terms and comprehensible.
    I would like to request if you could also have a video on college physics 😊 would be very grateful.
    Thank you

  • @jeongie9351
    @jeongie9351 Рік тому +2

    OMGGGGGGGGGG THANK YOU SO MUCH!!!!!!!!!!!! You saved my lifeeee

  • @AIDreams666
    @AIDreams666 7 місяців тому +1

    Allah bless u brother v good media u have made mashallah i watched complete 3 hours. v impressed by your skill set, everyone watch this video i greatly recommend it and it has a special space in my lil tinsy binsy heart

  • @Arab_Lanka
    @Arab_Lanka Рік тому +1

    Thank you so much 😊 you really helped me

  • @Hello46446
    @Hello46446 Рік тому +2

    Thank You Very Much for you videos ❤

  • @whoknows2298
    @whoknows2298 Рік тому +2

    sir, can you do a paper 6 revision before our igcse physics exams

  • @SaadKhan-jy1pk
    @SaadKhan-jy1pk 9 місяців тому

    really respect the content it was clear and direct appericiate it

  • @richardmueller3396
    @richardmueller3396 3 місяці тому

    Thanks for that highly interesting lecture!

  • @langkahberjasa5802
    @langkahberjasa5802 Рік тому +2

    I love u u are too great sir ..I won’t send my son to international school anymore … because IT cost a lot of money .You are too ,Great keep IT up.

    • @zade4545
      @zade4545 Рік тому +1

      I recommend sending your son to the school. It can help build memories and increase his skills in various subjects.

  • @MarvellousHarrison
    @MarvellousHarrison 2 місяці тому

    I literally wrote a mock today against next month exams and the last question you asked about why voltage is increased came out, and I just smiled thanking you so much in my heart.
    That was just one among the numerous other questions your videos helped me answer.

  • @anuvijay5683
    @anuvijay5683 Рік тому +2

    Thank you, sir. This helped me a lot. Sir, may I know if you take any online classes

  • @hamzasalmann
    @hamzasalmann Рік тому +2

    MashAllah sir, your english has improved drastically! Thank you for these amazing videos, super helpful

  • @mettabojang1562
    @mettabojang1562 2 місяці тому

    THANK YOU SO MUCH! YOU MADE PHYSICS EASYYYYY

  • @chiefchamp1841
    @chiefchamp1841 Рік тому +3

    thank you sir. can you also please do a video on unit 3 : waves? it would be really helpful.

    • @Hoellz
      @Hoellz Рік тому +1

      wish granted

  • @hishamawudu7532
    @hishamawudu7532 Рік тому

    Good video wish more people liked it

  • @deanachang201
    @deanachang201 Рік тому +1

    can you please please please have IB physics videos? i love your videos thank you!

  • @saadzzz1293
    @saadzzz1293 8 місяців тому

    Iv graps 47:13

  • @aditiroy2008
    @aditiroy2008 2 місяці тому

    Sir you deserve much more 🙏

  • @shaheerrehan474
    @shaheerrehan474 Рік тому

    very nice video .........would like if you consider going live on youtube to explain toipics

  • @ahmedlooo1914
    @ahmedlooo1914 2 місяці тому

    May god bless you youre a lifesaver!

  • @Tristanlu789
    @Tristanlu789 Рік тому +3

    It is so damn helpful, it is extremely clear and a million times better than my teacher 😅

  • @Why_did_YouTube_add_handles
    @Why_did_YouTube_add_handles Рік тому +10

    mr can you please do waves, they added a bunch of things about communications which i don't really understand. thanks a lot for this video, literally the only physics teacher i understand

  • @makerAr-qj3mk
    @makerAr-qj3mk Рік тому +6

    This was so helpful 💓💓plz can u do for general physics unit 1🙏🙏

    • @shamasshah4547
      @shamasshah4547 Рік тому +2

      its already done by him just click on his channel and you will find it there~

    • @localbookworm5384
      @localbookworm5384 3 місяці тому

      He uploaded this video before ch. 1

  • @Fz_v7
    @Fz_v7 Рік тому +2

    Waiting 🔜🔥🔥

  • @aasho2361
    @aasho2361 7 місяців тому

    Allah apko lambi aur kushi wai zindagi day

  • @helix336
    @helix336 Місяць тому

    literally the best teacher ever i passed last year because of you

  • @igcseteen
    @igcseteen 10 місяців тому +1

    i.swear.to.god you have singlehandedly saved my physics grades. I just know that ill manage to get above B in physics JUST by watching your videos. I thought i was so done for electricity but you just saved my LIFE! sir, i seriously dont know how to contact you personally for thanking you, but omg thank you so so so much. Literally saved my day, my year, and my physics grades😭

  • @MYMNegm
    @MYMNegm 10 місяців тому

    Thank you so much , very helpful

  • @smarttvacc-r1c
    @smarttvacc-r1c 6 днів тому +1

    all those who got a* and a pls sshare tips for eng math phy bio chem plssssssss

  • @Lhknvvnn78
    @Lhknvvnn78 7 місяців тому +1

    my final is in a month, thank you so much for this

  • @adiaryofateen2239
    @adiaryofateen2239 Рік тому

    Thx w za help , 👍 👍 👍 👍 good luck 4 y'all tmro 🎉

  • @thanos444.t
    @thanos444.t Рік тому +2

    can i get the ppt pls
    ty sm helped me so much

  • @dinas1623
    @dinas1623 8 місяців тому

    Very good video

  • @B______1_0._
    @B______1_0._ Рік тому +1

    thank you for this :)

  • @Lord_Of_Demise
    @Lord_Of_Demise 7 місяців тому +1

    4:25 Mo Ali getting excited about everything being charged 🤣
    (Just a Joke btw, he is a great teacher)

  • @wrishyawrishav882
    @wrishyawrishav882 11 місяців тому

    Thank you so much sir!!!

  • @BunmiOMODELE-g6p
    @BunmiOMODELE-g6p 2 місяці тому

    you seriously helped my life in a series video that will make me pass IGCSE what teachers struggled to do in 6years

  • @Official_ukc_
    @Official_ukc_ 4 місяці тому

    Thank you ❤

  • @Brenda-d5g
    @Brenda-d5g 11 місяців тому

    you're saving my life...thankyou :)

  • @MuhammadYussre
    @MuhammadYussre 2 місяці тому

    Mo, how do we change and measure current in a circuit

  • @Irshad5554
    @Irshad5554 Рік тому

    Good explained topic my teachers also can't take his job.

  • @Aisha-gd6dq
    @Aisha-gd6dq Рік тому

    Thank you so much sir.

  • @TZX_CLUTCH_FF
    @TZX_CLUTCH_FF 3 місяці тому +1

    The end peace was very satisfying😂 after making us use of so much brain bro said peace 😂.
    No joke bro literally taught better than schools.

  • @OG_Shady
    @OG_Shady Рік тому +3

    can u pls give us this pdf
    Thanks a lot btw this is a life saver!!!

  • @Itszzmeaisha
    @Itszzmeaisha 2 місяці тому

    Sir ur an amazing teacher and im really struggling with A level phy can you also make videos them?

  • @SpaceIntellect
    @SpaceIntellect 8 місяців тому

    17:45 No need to scream brother!!!!!!
    keep up the good work

  • @drzven_xx6872
    @drzven_xx6872 Рік тому +2

    YOU GOT ME AN A Thank you

  • @boblocdoge6581
    @boblocdoge6581 10 місяців тому

    mashallah mohammad bhaijan