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 off the headlights in your parked automobile. If each of the two head-lights draws 3.8 A, how long will it be before your battery is dead?

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amnamurad28748 amnamurad28748 · Answer 1 · 2020-04-26T03:20:21+02:00

Answer:

7.894 Hours.

Explanation:

Based on information number hours that this battery will last with give load has mathematical relation of.

[tex]t = \frac{60Ah}{load in amperes.}[/tex]

with load 60A t = 1h, 30A t = 2h so on and forth.

two head lights draw total current of 2x3.8A = 7.6A.

putting this in above relation gives.

[tex]t = \frac{60Ah}{7.6A}=7.894 h[/tex].

That is how long will it be before battery is dead.

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andromache andromache · Answer 2 · 2022-03-29T17:38:01+02:00

The time taken before your battery is dead and when the two head-lights draws 3.8 A should be 7.894 Hours.

Since we know that

t = 60aH/ loadinampheres

Here

load 60A t = 1h, 30A t = 2h so on and forth.

two headlights draw a total current of 2x3.8A = 7.6A.

So, the time taken should be

= 60/7.6A

= 7.894 h

hence, The time taken should be 7.894 Hours.

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