A car battery has a rating of 250 ampere-hours. This rating is one indication of the total charge that the battery can provide to a circuit before failing. (a) What is the total charge (in coulombs) that this battery can provide? (b) Determine the maximum current that the battery can provide for 37 minutes.

Respuesta :

Answer:

Total charge provided by the battery could be 900000 C.

Maximum current provided by the battery for 37 minutes could be 405.405 A

Explanation:

Rating= 250 A-h

a. Total charge:

[tex]Rating=Q/t\\Q=Rating.t\\[/tex]

Suppose t=1h

[tex]Q=250 A(1h)\\Q=250 A(3600 sec)\\Q= 900000 A.sec[/tex]

We konw that [tex]Ampere=\frac{Coulomb}{sec}[/tex], replacing:

[tex]Q=900000(\frac{Coulomb}{sec})(sec)\\Q=900000 Coulomb[/tex]

Total charge provided by the battery could be 900000 C.

b. Maximum current for 37 minutes

[tex]I=\frac{Q}{t} \\I=\frac{900000 C}{37*60 sec}\\I=405.405 A[/tex]

Maximum current provided by the battery for 37 minutes could be 405.405 A