Yes, the differences in mains voltages between countries can have an impact on the performance of electrical appliances, including both kettles and toasters. In general, appliances designed for use in countries with higher mains voltages will tend to operate more efficiently and potentially faster than those designed for lower mains voltages.
Here's why this happens:
Power Consumption: Power (Watts) is the product of voltage (Volts) and current (Amperes). In the UK, with a mains voltage of 240V, electrical appliances like kettles and toasters can draw more power compared to the US, where the mains voltage is 120V. For the same power rating, a UK appliance will draw half the current compared to a US appliance.
Faster Heating: In the case of kettles, with higher power consumption in the UK, the heating element can generate more heat in a shorter time, leading to faster boiling times. The same principle applies to toasters. With higher power consumption, the heating elements in a UK toaster can reach toasting temperatures more quickly than a US toaster.
Energy Efficiency: Appliances operating at higher voltages can often be more energy-efficient since they achieve their desired results in less time, requiring less electricity overall.
Design Considerations: Manufacturers design appliances to perform optimally in the regions where they will be sold. Appliances in countries with higher voltages may be engineered differently to take advantage of the higher power supply.
However, it's important to note that the difference in toasting time between UK and US toasters might not be as noticeable as in kettles, as toasting involves a slightly more complex process. The type of heating element, insulation, and design of the toaster can also affect toasting times.
In summary, appliances like kettles and toasters in the UK, operating at 240V, may have a performance advantage over their US counterparts, which operate at 120V, leading to faster heating and toasting times.