A spark is produced between two insulated surfaces, maintained at a constant potential difference of 5.0 × 10⁶ V. The energy output is 10⁻⁵ J. How many electrons have been transferred in the spark?
a. 1.25 × 10⁷
b. 1.20 × 10⁷
c. 1.35 × 10⁷
d. 1.25 × 10⁶
e. 1.25 × 10⁸