# Current and Amp hour

Discussion in 'Math' started by civic_driver, Mar 28, 2009.

Mar 28, 2009
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2. ### t_n_k AAC Fanatic!

Mar 6, 2009
5,448
790
Q.8

300 hours.

The 1A current is drawn for ten minutes every hour. The AH drawn per hour is therefore (10/60)x1 or 1/6 AH per hour. the 50AH battery will last for

50/(1/6) = 300 hours

Q.9

50 hours.

On average the current is 1A - 50% time it is on at 2A % & 50% off.

So 1AH is consumed each hour. The 50AH battery will last for 50 hours.

3. ### civic_driver Thread Starter New Member

Mar 28, 2009
3
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I still don't get it. Can you explain the second one without using duty cycles? thanks

4. ### thatoneguy AAC Fanatic!

Feb 19, 2009
6,349
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Do you need help understanding duty cycles? Or the formula to calculate AH?

On a test or real life, the numbers are different. In your case, understanding how the answer was attained is much more important than the actual answer.

5. ### thingmaker3 Retired Moderator

May 16, 2005
5,073
8
Half the time the battery supplies no current. The other half of the time, the battery supplies two amp. 50 AH / 2 A = 25 Hours. 25 hours is half of 50 hours. So the battery will last 50 hours.

6. ### civic_driver Thread Starter New Member

Mar 28, 2009
3
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I read up on duty cycles and now understand how the answer is attained. Thanks!