1. Not finding help here? Sign up for a free 30min 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!

Hand cranked radio question

  1. Dec 4, 2008 #1
    hand cranked radio question (ignore - figured out)

    Your two friends argued whether they should crank more cycles (e.g. 180 cycles in 1 minute) or longer time (e.g. 180 cycles in 2 minutes) to efficiently charge the internal batteries. They couldn't conclude with their knowledge and decided to ask you about this. What would be your professional opinion?

    3. The attempt at a solution

    I'm not really sure on this one. It seems like speed would be a factor, but I'm not sure if the generator is only reliant on the number of turns. Can someone please help?
    Last edited: Dec 5, 2008
  2. jcsd
  3. Jan 18, 2009 #2
    They don't specify the type of battery but I'm assuming they aren't lead acid batteries. What do you know about recharging currents of non-lead acid batteries?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?