It's a familiar sound that usually passes without much thought – the enigmatic clicking of an electric kettle when it's not in use. But for some who have spent their lives with this household ...

An electric kettle, typically made of plastic or steel, has a heating element on the bottom. The kettle is plugged into an electrical outlet, which powers the coil and heats up the water.

The power output is used to run a 2,000 W kettle. Calculate the current in the primary coil (the input current). (The power in each coil will be the same, since transformers are 100 per cent ...

The power output is used to run a 2,000 W kettle. Calculate the current in the primary coil (the input current). (The power in each coil will be the same, since transformers are 100 per cent ...