Question

How much energy is supplied to each coulomb of charge that flows through a 12-v battery?

Answer 1

Energy supplied to the charge is given by

$U = q\Delta V$

here we know that

$q = 1C$

also we have

$\Delta V = 12 volts$

now we have

$U = (1)(12) J$

$U = 12 J$

so the energy given by battery will be 12 J