A 40V battery that can store 3000 J of energy is connected t

A 4.0-V battery that can store 300.0 J of energy is connected to a resistor. How much electrical charge must flow between the battery\'s termiñals to completely drain the battery if it is fully charged? A) 1200 C B) 0.05 C C) 0.01 C D) 75 C

Solution

1 coulomb across 1 volt is 1 joule

Q * V = E

Q = E/V
Q = 300J / 4V
Q = 75C

so answer is D. 75 C