Posted by **rick** on Wednesday, January 30, 2008 at 8:50pm.

A car battery has a rating of 200 ampere·hours (A·h). This rating is one indication of the total charge that the battery can provide to a circuit before failing.

What is the total charge (in coulombs) that this battery can provide?

Determine the maximum current that the battery can provide for 44 minutes.

- physics -
**Damon**, Wednesday, January 30, 2008 at 9:05pm
An amp is a coulomb/second

So a coulomb = amp second

200 amp hours * 3600 s/hr = 720,000 amp seconds = 720,000 coulombs

44 minutes = 2640 seconds

i * time = charge = 720,000 c

i = 720,000/2640

i = 273 amps

(actually it would probably burn up, but that is another problem :)

- physics -
**DrBob222**, Wednesday, January 30, 2008 at 9:06pm
amperes x seconds = coulombs.

200 x 1 hour = rating.

200 x 60 minutes = rating.

44/60 of that = ??

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