The total charge that an automobile battery can supply without being recharged is given in terms...
The total charge that an automobile battery can supply without being recharged is given in terms of ampere-hours. A typical 12-V battery has a rating of 60 ampere-hours (60 A for 1 h, 30 A for 2 h, and so on). Suppose that you forget to turn the headlights off in your parked automobile.
If each of the two headlights draws 2.1 A, how long will it be before your battery is "dead"?
Homework Answers
total current = 2.1 + 2.1 = 4.2 A
time required = I/rating
= 4.2 / 60
= 0.07 h = 0.07*60 = 4.2 minutes
so the battery will die in 4.2 minutes
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