An experimental sensor node in a remote weather station uses a heating resistor to prevent ice formation. The resistor has a resistance of 2.7 kΩ2.7\text{ k}\Omega2.7 kΩ and dissipates power at a rate of 12 W when active.
What is the potential difference across the resistor?
5.7 V5.7\text{ V}5.7 V
180 V180\text{ V}180 V
32 400 V32\,400\text{ V}32400 V
0.067 V0.067\text{ V}0.067 V
26 exam-style questions on OCR A A Level Physics Energy, power and resistance, covering Circuit symbols, E.m.f. and p.d, Resistance, Resistivity, and Power. Each one has a worked solution and a mark scheme showing where the marks go.