Turn on thread page Beta
    • Thread Starter

    I really don't understand AC and DC - I know what they are and have a vague idea of the differences between them but I don't understand what is useful where and why? Like how do you know whether to use an AC or DC supply in a circuit or experiment or whatever? Thanks for your help in advance. x

    AC is a alternating current so it is changing from positive to negative with a chosen interval usually used in motors DC is direct current and is constant current which doesn't change
Submit reply
Turn on thread page Beta
Updated: March 14, 2018
The home of Results and Clearing


people online now


students helped last year

University open days

  1. SAE Institute
    Animation, Audio, Film, Games, Music, Business, Web Further education
    Thu, 16 Aug '18
  2. Bournemouth University
    Clearing Open Day Undergraduate
    Fri, 17 Aug '18
  3. University of Bolton
    Undergraduate Open Day Undergraduate
    Fri, 17 Aug '18
Do you want your parents to be with you when you collect your A-level results?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.