A smart home security hub is connected to the UK mains electricity supply, which has a nominal potential difference of 230 V230\text{ V}230 V.
The current in the hub is 0.08 A0.08\text{ A}0.08 A. Calculate the power of the hub.
Use the equation:
power=potential difference×current \text{power} = \text{potential difference} \times \text{current} power=potential difference×currentCalculate the energy transferred by the hub when a charge of 650 C650\text{ C}650 C flows through it.
Use the equation:
energy transferred=charge flow×potential difference \text{energy transferred} = \text{charge flow} \times \text{potential difference} energy transferred=charge flow×potential differenceA technician is repairing the hub with its protective outer casing removed, exposing the live wire connection inside. Describe the difference between the hazard and the risk in this scenario for the technician.