Car batteries are often rated in amp-hours. This rating indicates the quantity of charge that can pass through the battery before the battery's chemical energy must be restored by the car's generator or some other source. The amp-hour unit is convenient for simple calculations. For example, a 60-amp-hour battery can supply a current 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 62 A-h, 13 V car battery (b) a 1.2 A-h, 1.4 V flashlight battery
Car batteries are often rated in amp-hours. This rating indicates the quantity of charge that can pass through the battery before the battery's chemical energy must be restored by the car's generator or some other source. The amp-hour unit is convenient for simple calculations. For example, a 60-amp-hour battery can supply a current of 1.0 A for 60 h (or 60 A for 1.0 h) before going dead. Find the energy stored in the following.
Amp-hour (A-h) is an unit that shows for how many hours the battery can supply a current of 1 A or how much current the battery can supply for 1 hour. So, it is basically a unit for charge.
Energy is basically:
Units for the Energy would be Watt-hour (W-h) or Joule (J).
Note:
Watt (W) is a unit of Joule per seconds. So, if Watt-hours (W-h) ever needs to be converted into Joules (J), "hour part" needs to be converted into seconds by multiplying the magnitude with a factor of 3600 (seconds/hour), as 1 hour = 3600 seconds)
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