All Science Fair Projects  

Science Project Forum

Welcome to the Mad Scientist's Forum! Join thousands of other students who've received help from the Mad Scientist and our science Mentors!
Register first, then post your questions below. Registration takes only 1 minute! Meet the Mad Scientist
Lost your
Go Back   All Science Fair Projects > Get Help for Your Grade K - 5 Science Fair Projects > Physics (Grades K-5)
User Name

Thread Tools Display Modes
Old 11-13-2005, 09:35 AM
confusedscientist confusedscientist is offline
Junior Member
Join Date: Nov 2005
Posts: 1
Rep Power: 0
confusedscientist is helpful, nice and has lots of friends here
Exclamation help me if you can!!!

Thanks for viewing this. I am making a project on lead-acid batteries and i dont exactly know what is meant by "Ah" which is written on the batteries and if there is more "Ah" does the motor or something runs for a long time?

If there is a 12v 0.3A bulb how can we calculate that for how much time can it glow with a fully charged 12v 2Ah lead-acid battery?

Last edited by confusedscientist; 11-13-2005 at 09:43 AM..
Reply With Quote
Old 11-13-2005, 08:25 PM
catwood catwood is offline
Junior Member
Join Date: Nov 2005
Location: United States
Posts: 8
Rep Power: 15
catwood is helpful, nice and has lots of friends here
Default Ah

a chance to use my knowledge from my fighting robot experiences!

AH means Amp-hours. all batteries (that i know about) are measured in Amp-hours or milliamp-hours, which are 1/1000th of an amp-hour. Ah refers to the capacity of the battery, so a 12 ah battery should power a motor for about twice as long as a 6 Ah battery. A 2 Ah battery is capable of putting out 2 amps for an hour or 4 amps for 1/2 hour or 1 amps for 2 hours etc.

The formula for battery power with an SLA is AH = ((I * T) / 60) * 1.6) where I = current draw, T = time in minutes and AH = amphours of battery so plug in your 2 ah battery and .3 amp lightbulb and solve for T. so your lightbulb should be able to be powered for 250 minutes or just over 4 hours.

hope this helps
Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Forum Jump

All times are GMT -8. The time now is 03:46 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Copyright (C) 2006 All Science Fair All Rights Reserved