An implantable medical telemetry sensor has an effective resistance of 12 kΩ12\text{ k}\Omega12 kΩ and is powered by a steady potential difference of 3.0 V.
What is the electrical energy dissipated by this sensor during 8.0 hours8.0\text{ hours}8.0 hours of continuous operation?
6.0×10−3 J6.0 \times 10^{-3}\text{ J}6.0×10−3 J
7.2 J7.2\text{ J}7.2 J
21.6 J21.6\text{ J}21.6 J
2.16×104 J2.16 \times 10^{4}\text{ J}2.16×104 J
