1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Increasing current ?

  1. Feb 8, 2009 #1
    In my physics lab , we do our expt. : analysis of HYSTERESIS curve which requires a current of 1-2 A to magnetise the solenoid , now we have a ready made instrument for getting that value of current .

    So what could i do manually in order to get that magnitude of current from AC mains which has a feeble current of around 30 mA.
  2. jcsd
  3. Feb 9, 2009 #2
    use a transformer, or an amplifier.
  4. Feb 9, 2009 #3


    User Avatar

    Staff: Mentor

    1-2A at what voltage? AC or DC?

    What do you mean by 30mA? You only have 30mA at 120Vrms available (why?), or you only need 30mA at some AC or DC voltage (what voltage?) for some variation on the experiment?
  5. Mar 1, 2009 #4
    Dude, if he doesn't know V=IR, why would he know what 120Vrms meant?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook