A 12 V, 24 W bulb used at its correct voltage is powered from
the 240 V main by means of a step-down transformer, which is
assumed to be 80% efficient. What current flows in the primary coil
of the transformer?
Select one:
a. 0.075 A
b. 0.125 A
c. 0.250 A
d. 1.25 A
e. 1.50 A