The potential difference across a car headlamp is $12\,\text{V}$. The current in the lamp is $2.5\,\text{A}$. What amount of energy does the lamp transfer in $1.0\,\text{hour}$?
- A$1800\,\text{J}$
- B$1800\,\text{W}$
- C$108\,000\,\text{J}$
- D$108\,000\,\text{W}$