The total charge that anautomobile battery can supply without being recharged is

Question

The total charge that anautomobile battery can supply without being recharged is given interms of Ampere-hours. A typical 12-V battery has a rating of 77 A· h . Suppose you forget to turn off the headlights in yourparked automobile. If each of the two headlights draws 1.6 A, findout the time before your battery is “dead”.

Answer in units of h. The total charge that anautomobile battery can supply without being recharged is given interms of Ampere-hours. A typical 12-V battery has a rating of 77 A· h . Suppose you forget to turn off the headlights in yourparked automobile. If each of the two headlights draws 1.6 A, findout the time before your battery is “dead”.

Answer in units of h.

Explanation / Answer

Given that charge Q = 77 A.h                Current to single heading light = 1.6 A total current for two head lights I = 3.2 A                 time = ? We know that                           Q = I t From this relation we have                          t = Q / I                            = 77 A. h / 3.2 A                            = 24.0625 hours.

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