Car batteries are often rated in amp-hours. This rating indicatesthe quantity of
ID: 1669459 • Letter: C
Question
Car batteries are often rated in amp-hours. This rating indicatesthe quantity of charge that can pass through the battery before thebattery's chemical energy must be restored by the car's generatoror some other source. The amp-hour unit is convenient for simplecalculations. For example, a 60-amp-hour battery can supply acurrent of 1.0 A for 60 h (or 60 A for 1.0 h) before going dead.Find the energy stored in the following. (a) a 64 A-h,10 V car battery? J
(b) a 1.2 A-h, 1.7 V flashlight battery
? J (a) a 64 A-h,10 V car battery
? J
(b) a 1.2 A-h, 1.7 V flashlight battery
? J
Explanation / Answer
energy=v*i*time=64*10*3600==2304000J b) energy=v*i*time=1.2*1.7*3600==7344J