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!

Homework Help: Motor and Battery!

  1. Jun 12, 2005 #1
    Hey everyone,

    I built a motor for my physics exam....and it works extremely well....it spins extremely fast and there are sparks galore on the commutator.

    I have it attached to a 6V lantern battery (the ones a bit bigger than your fist).

    How long can I expect the battery to keep powering the motor at high speed? Surely if it's that big of a battery, and the circuit is shorted for a split-second...I can expect to keep running the motor for a long long time?
  2. jcsd
  3. Jun 12, 2005 #2


    User Avatar
    Science Advisor

    There is no way to calculate that without knowing a lot of details about resistance, etc. in your motor. If it's important, hook up a battery and time it.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook