An experimental bio-impedance sensor implanted in tissue operates with a potential difference of 85 mV across its terminals. The current flowing through the sensor is measured to be 1.8 mA.
Calculate the electrical power, in microwatts (μW\mu\text{W}μW), dissipated by this sensor.
31 exam-style questions on Edexcel GCSE Physics 10.3 Electrical energy and power, covering 10.3.1 The heating effect of an electric current, 10.3.2 Reducing energy transfer in wires, 10.3.3 Advantages and disadvantages of the heating effect, 10.3.4 Energy transferred by an electrical circuit, 10.3.5 Electrical power, and 10.3.6 Energy transfers in domestic devices. Each one has a worked solution and a mark scheme showing where the marks go.