Electric Current – A Level Physics

Published on May 12, 2015 by

Why does electric current have the symbol 'I' and is it just the flow of electrons? Watch this short video to find out a bit more.

Thanks for watching,



Find even more videos organised by exam board and topic at:

GCSE Physics Online
► https://www.gcsephysicsonline.com
A Level Physics Online
► https://www.alevelphysicsonline.com

Your support in watching this video has been invaluable! To contribute towards the free videos on YouTube, make a small donation at:
► https://www.paypal.me/physicsonline

► https://www.youtube.com/physicsonline?sub_confirmation=1
► https://www.instagram.com/physicsonline/
► https://www.facebook.com/gcseandalevelphysicsonline

#currents #alevelphysics #physicsonline

Category Tag


Advertise here. Telegram, Signal - Call/message +1-868-308-4028.


  • Louis Wright 7 years ago

    No joke I would literally be failing physics without these videos

    • mackenzie thompson 3 years ago

      is a level physics difficult?

    • Coding Barber 3 years ago

      @LoliLicker just wait till u start quantum physics

  • Ishan Shezad 7 years ago

    Great stuff man!

  • Robert Thompson 6 years ago


  • Jaisul Naik 6 years ago

    Is this exam board specific? I’m doing OCR AS and I’m starting this year? Would it be suitable for the new spec (AS exams in 2016)?

    • Physics Online 6 years ago

      +Jaisul Naik Everything is suitable for the new spec (first exam next year), have a look at my website where there are a few resources for the OCR Spec A course.

    • Jaisul Naik 6 years ago

      +A Level Physics Online ok cheers

    • Nicholas Lo 6 years ago

      +A Level Physics Online What about CIE?

    • Physics Online 6 years ago

      There’s no reason why this isn’t suitable, just make sure you check with the course specification to find the exact content you need.

  • Jaisul Naik 6 years ago

    How would you recommend these videos are best used? I’m guessing they’re not enough as a lone source of revision?

  • Shayan Azad 6 years ago

    i am going to sit for the IAL exams in may.Will this solve all my problems?

  • Ryan Varghese 6 years ago

    Will these videos help me if I am doing WJEC for Physics this Summer ???

    • Physics Online 6 years ago

      Yes they will. Just check on the WJEC spec which ones in particular, there is a full list of every video on my website. Good luck.

  • Mehbubul Alam 5 years ago

    Why does the ammeter need to have a low resistance in the circuit?

    • Physics Online 5 years ago

      Otherwise its resistance would reduce the very flow of current it is trying to measure.

  • Tanya Y 5 years ago

    Thank you!!! I’m writing my pre mocks tomorrow and this was a great refresher!

  • DanLiti Usman 5 years ago

    Sir, I would like to ask, on which exam board do you teach students in?

    • Physics Online 5 years ago

      Ibrahim Usman Last year it was OCR Spec A, now its AQA.

  • Ethan Bradshaw 5 years ago

    Hi, why should ammeters have very low resistance, I can never give a good enough explanation?

  • tanna mcdaniel 4 years ago

    Thanks my lecturer

  • Holly Ullyott 3 years ago

    Can someone please explain why current flows form the positive to negative terminals while the electrons are repelled from the negative and move towards the positive?

    • Physics Online 3 years ago

      Holly Ullyott Because conventional current is defined as the rate of flow of positive charge (but electrons happen to be negative)

    • Holly Ullyott 3 years ago

      GCSE and A Level Physics Online  I heard it was because when electricity was first discovered they assumed the positive particles were moving. Is that why the definition stands?

    • Physics Online 3 years ago

      Holly Ullyott That’s right

    • mackenzie thompson 3 years ago

      is a level physics the hardest science a level?

    • Sea 3 years ago

      mackenzie thompson i feel like Chemistry is harder but depends on the person

  • The Sack of Chilinuts 3 years ago

    How do you afford lego?

  • Joshua Wainwright 3 years ago

    Anyone else think that the copper sulfate was powerade at first glance?

  • Saym 2 years ago

    your visual teaching method is really helpful it’s just a shame not enough people know about you because you could really help a lot of people

    • Physics Online 2 years ago

      I’m aiming to change that, so more people do know about me. Keep spreading the message!

    • WeekendNumbered 2 years ago

      @Physics Online I was at the Emmanuel Centre in London and I heard you’re talk. It was really good, thank you.

  • Safe Rehman 2 years ago

    Wow looks like a lot of planning and work for this, defo will try to share with my whole year thanks

Comments are closed.