Question

What is the total amount of energy stored in a 12-V, 75 A*h car battery when it is fully charged?

Answer 1

Explanation:

Power is current times voltage.  Power is also energy per time.

P = IV = E/t

Solving for energy:

E = V It

E = (12 V) (75 Ah) (3600 s / h)

E = 3,240,000 J

E = 3240 kJ